WO2014057581A1

WO2014057581A1 - Compressed oil-palm material, bonding composition for oil-palm material, method for bonding oil-palm material, laminated plywood, and manufacturing method therefor

Info

Publication number: WO2014057581A1
Application number: PCT/JP2012/076506
Authority: WO
Inventors: 昌男福山; 隆行伊藤; 高志青野
Original assignee: マイウッド・ツー株式会社
Priority date: 2012-10-12
Filing date: 2012-10-12
Publication date: 2014-04-17

Abstract

The present invention uses the trunk of an oil palm and comprises either sheets of a prescribed thickness stripped from the outside of the trunk or boards sawed to a prescribed width, thickness, and length bonded together without the addition of components other than those naturally present in the oil palm. This invention consists of a plurality of sheets of an oil-palm material (W), obtained by stripping a prescribed length of oil-palm trunk (WD) to a prescribed thickness using a rotary lathe while rotating the trunk in the circumferential direction thereof, and/or boards (Z), sawed like lumber from a prescribed length of oil-palm trunk (WD) to a prescribed width, thickness, and length, bonded together by resin components and sugar components in the oil-palm trunk (WD) itself. Thus, with the surfaces of the oil-palm material (W) stripped to a prescribed thickness serving as adhesive bonding surfaces, a plurality of sheets of said oil-palm material (W) can be bonded together by resin components, such as lignin, and sugar components, such as cellulose and hemicellulose, obtained from the oil palm itself by compression to a thickness of approximately 1 mm, with the compression force and the temperature of the oil-palm material (W) and/or boards (Z) controlled.

Description

Oil palm compacted material, oil palm material joining composition, oil palm material joining method, laminated plywood and method for producing the same

TECHNICAL FIELD The present invention relates to an oil palm (oil palm), which is a kind of palm, and is an oil palm consolidation in which oil palm is thinly peeled or made into lumber, or an oil palm thin plate and another thin plate are joined together. The present invention relates to a material, an oil palm material bonding composition, an oil palm material bonding method, a laminated plywood, and a method for producing the same. This oil palm compacted material, oil palm material joining composition, oil palm material joining method, laminated plywood and manufacturing method thereof include building materials such as floor materials and wall materials of a house, partition materials, furniture materials, and boats. It can be used for the exterior and interior of ships, other indoor and outdoor decks and playground equipment, and vehicle body bodies.
In general, “board” is described as “thin timber thin and flat”, “thin metal or stone thin and flat”, etc. according to Kojien, but here, oil palm is made of wood. Although it does not have properties, it has properties close to bamboo, but in oil palm, “thinned and flattened” will be referred to as “peeling plate” and “oil palm material”. Moreover, since there is no term which refers to the material of oil palm in detail, it will call with the concept similar to wood. And the building material means the material in the form of a flat plate used for the building and the material for household goods, and the oil palm compaction material is the material in the form used for building and household goods using at least oil palm. Means.

In general, an oil palm tree consists of a single trunk and reaches a height of 10 to 20 m or more. The leaves are wing-shaped and about 3-5m long, about 30 young trees a year, and about 20 new trees grow over 10 years old. The flower is composed of 3 petals and 3 buds, each forming a small but dense group, and it takes about 6 months from fruiting to fruit ripening. The fruit consists of fleshy flesh (medium pericarp) with a lot of oil and one seed that is also rich in oil, and the weight of the fruit is about 40-50 kg per bunch.

It has been cultivated in plantations in Southeast Asia since the latter half of the 19th century, and palm oil (palm oil), a vegetable oil extracted from oil palm, is more productive and cheaper than other vegetable oils such as soybeans and rapeseed. Therefore, it is used for foods such as margarine and oil for fried foods. It is also widely used in soaps and cosmetics. In recent years, the amount of palm oil (palm 輸入 oil) imported to Japan from Southeast Asia such as Malaysia and Indonesia is increasing. Therefore, generally speaking, the term “oil palm” may refer to the meaning of fats and oils that can be taken from the pulp and seeds and the trunk of oil palm.

In general, oil palm is a collective term for plants classified into the genus Palmae, and is famous for two types: Elaeis guineensis, native to West Africa, and Elaeis oleifera, native to Latin America. Among the cultivars, there is a hybrid of Guinea oil palm and American oil palm. In particular, oil palm (oil palm), which is a kind of palm used as a raw material for vegetable oils and fats, may be referred to as “oil palm”.
In other words, oil palm can remove fats and oils from pulp and seeds, and the amount of fats and oils obtained per unit area outperforms other plants. Because agriculture is carried out, it may be becoming more prominent to call the oil and fat “oil palm”.
However, in the present invention, it does not mean the oil palm of fats and oils that can be taken from the pulp and seeds, but the trunk of the oil palm itself or the whole plant is called oil palm.

Patent applications dealing with this oil palm include those listed in Patent Document 1 (invention dealing with empty fruit bunch). In patent document 1, the manufacturing method of the building material using oil palm is disclosed. Specifically, after the palm fiber is washed, it is dried so that the dry oil becomes 95%, and the dried palm fiber is blown and cut in units of 1 to 1.5 cm to produce a palm fiber chip. Pulverizing the dried palm fiber with a particle size of 200 mesh, pulverizing bamboo with a particle size of 200 mesh, the palm fiber chip, the palm fiber powder, the bamboo powder, and the bioceramic powder Are prepared in a ratio of 1: 1: 1: 1 to produce a main raw material, a step of extracting fly ash having a particle size of 200 mesh from coal carbide, a flame inhibitor and a heat resistant resin. A step of producing a binder by mixing and melting a flame retardant resin for curing at a ratio of 1: 1, 20-30% by weight of the produced binder, 50-60% by weight of the mixed main raw material, fly ash 2 Mixing a powder of ˜25% by weight and kneading in a high liquid state, passing the kneading through a molding part that radiates a temperature of 150 to 200 ° C. and baking it first, and baking the molded product Rolling between a plurality of upper roller groups and lower roller groups that are arranged so that the distance between the upper roller group and the lower roller group gradually becomes narrower and gradually rolling to a smaller thickness; and A step of freezing at 0 to 4 ° C. while passing through a cooling unit composed of a number of upper roller groups and a lower roller group, and a step of cutting the molded product in a unit of a certain length by a blade that is raised and lowered by a cutting cylinder. It consists of processes.

In this patent document 1, palm fiber is not only harmless to the human body by using it as a main raw material, but palm fiber cut at 1 to 1.5 cm is used together with palm fiber powder. It becomes a solid building material by acting as a temporary bridge with other contents, and antibacterial and deodorizing functions can be realized by bamboo and bioceramics. Further, generation of far infrared rays and anions can be expected without generating mold. And nonflammable waste material can be recycled and manufacturing cost becomes cheap. Furthermore, since no toxic gas is generated from all the compositions, it is said to be highly safe as a building material.

Further, in Patent Document 2 (invention dealing with empty fruit bunches), the plate-like body or molded body is made by attaching a resin having rubber-like elasticity to the oil palm fibers obtained by defibrating the empty fruit bunches of oil palm. A plate-like body or a molded body obtained by compression molding.
Therefore, the oil palm fiber obtained by defibrating the empty fruit bunch of oil palm has a fiber repellent property because, for example, palm oil adheres to the fiber surface compared to other palm fibers such as coconut palm fiber. The aqueous solution is excellent, and the amount of cellulose and lignin contained in the fiber is relatively large, so that the water resistance is excellent. In addition, the oil palm fiber has a high fiber strength, a large fiber diameter, and a long fiber length as compared with other palm fibers such as a coconut fiber, and therefore has excellent dimensional stability. In addition, since the oil palm fiber has large irregularities on the surface and high bending strength, and the entanglement between the fibers is large, the dimensional stability is also enhanced by this. Therefore, this plate-shaped body or molded body is excellent in dimensional stability during water absorption and moisture absorption.
And since the irregularities on the surface of the oil palm fiber are large, the resin exhibiting rubber-like elasticity penetrates into the voids on the surface of the oil palm fiber and solidifies or hardens, which acts like a nail or wedge, so-called anchor effect. Therefore, the oil palm fiber is strongly bonded to the resin having rubber-like elasticity. This is also considered to contribute to the improvement of dimensional stability at the time of water absorption and moisture absorption.

The oil palm fiber is superior in elasticity recovery properties, for example, because the fiber has a large rigidity and strength, a large fiber diameter, and a long fiber length, compared to other palm fibers such as coconut fiber. Yes. Further, the oil palm fiber has high fiber bending strength and large entanglement between the fibers, so that the elastic recovery is improved. And the resin which shows rubber-like elasticity has high elastic recovery property. Therefore, a plate-like body or molded body in which oil palm fibers are connected by a resin exhibiting rubber-like elasticity exhibits excellent elastic recovery, good walking feeling and cushioning properties, and good sound insulation.

Since this plate-like body or molded body uses oil palm fiber, less labor is required for defibration, etc., compared to other types of palm fiber, so that manufacturing costs and energy can be reduced, and the product is inexpensive. Become. For example, coconut fiber is immersed in water for a long period of time to soften the coconut shell, and then requires a great deal of energy for a long period of time to be mechanically fibrillated. On the other hand, oil palm defibrates empty fruit bunches that are originally in the form of fibers, so that there is no need for immersion in water, and very little energy is required for defibration. In addition, oil palm fibers have less dusting properties than coconut fibers, and the working environment can be prevented from deteriorating in handling.
Furthermore, since a large gap is formed between the fibers of the oil palm fiber, when a resin exhibiting rubber-like elasticity is supplied by spraying or dipping, the resin adheres evenly to all the fibers through the gap, and the strength distribution is A plate state of being uniform is obtained.

And in patent document 3 (invention of an oil palm trunk), the technique of the laminated plywood which made the adhesive penetrate | penetrate the fiber exposed on the surface of the several single board bonded together by the adhesive agent is disclosed.
The palm laminated plywood according to Patent Document 3 includes a plurality of veneers bonded with a resin adhesive, and at least one of the plurality of veneers is a palm veneer, A resin adhesive is permeated into palm fibers exposed on the surface of the plate. This allows the surface to be treated with a resin adhesive using a single veneer that can be produced from a palm trunk of inexpensive waste material, without using a veneer of relatively good quality as a face and back. Thus, a laminated plywood is manufactured at a low cost.

In addition, the palm laminated plywood of Patent Document 3 uses a plurality of veneers as palm veneers, uses only palm veneers that can be manufactured from a palm trunk of an inexpensive waste material, and bonds them together with a resin adhesive. May be. The resin adhesive permeated into the palm fiber at this time is the same type as the resin adhesive that bonds a plurality of single plates. Since the resin adhesive is of the same type, a laminated plywood can be manufactured at low cost. Here, the term “same system” includes the same resin adhesive and a composition whose composition (for example, composition ratio) is changed.

And the palm laminated plywood of patent document 3 makes the palm fiber penetrate | infiltrate a resin adhesive after palm grinding | polishing the surface which makes a palm fiber osmose | permeate a resin adhesive, and reduces the palm fiber which protrudes from the laminated plywood surface. The resin adhesive is infiltrated into the resin. This laminated plywood manufacturing method includes a step of bonding a plurality of single plates with an adhesive, a step of polishing a surface of the plurality of single plates that penetrates the adhesive into exposed fibers, and a polished surface The step of applying an adhesive to the fiber and infiltrating the adhesive into the fiber, and the step of drying the adhesive, without using a veneer of relatively good quality wood as a face and back, A laminated plywood can be manufactured at low cost.
Thus, according to Patent Document 3, a laminated plywood, a palm laminated plywood, and a laminated plywood manufacturing method that can be manufactured at low cost without using a single veneer of a tree having relatively good quality as a face and a back. It is disclosed.

JP 2009-166342 A JP-A-10-8696 JP2011-68015 A

Thus, patent document 1 and patent document 2 are both utilization of the oil palm fiber obtained by defibrating the empty fruit bunch of the oil palm fruit, and do not directly use the trunk of the oil palm. Absent. However, the trunk of the oil palm is 20 m or more in mature wood, and its use is desired because it has a volume ratio of 90 to 95% of the whole.
Especially in Southeast Asia such as Malaysia, oil palm is cultivated for the production of palm oil, but the empty fruit bunch after palm oil collection contains a lot of fiber etc. Is used in various applications such as fiber boards. However, palm trunks that are harvested every year are not used effectively and are currently being disposed of.

Patent Document 3 discloses a process in which at least one outermost single plate is bonded to a palm single plate with a plurality of resin adhesives, and the surface of the palm single plate is a resin adhesive on the exposed palm fibers. Disclosed is a method for producing a laminated plywood, comprising: a step of polishing a surface that impregnates a surface; a step of applying a resin adhesive to the polished surface to infiltrate the resin adhesive into palm fibers; and a step of drying the resin adhesive is doing. However, it is unclear how to apply the resin adhesive to the palm veneer, or to penetrate the resin adhesive into the exposed palm fiber, and there is no specific method for producing laminated plywood. It is unknown. At least, it is premised on the use of a resin adhesive in which a palm single plate is bonded with a plurality of resin adhesives.

Therefore, the present invention uses a trunk of oil palm, without adding a component different from the component that the oil palm itself originally has, a peeling plate peeled off from the outer periphery to a predetermined thickness or a predetermined width and It is a first object to provide an oil palm compacted material obtained by joining a lumber plate that has been subjected to thickness and length cutting.
Further, Patent Documents 1 to 3 do not explain how to apply a resin adhesive to a palm single plate or how to penetrate a resin adhesive into an exposed palm fiber. The specific method for producing a laminated plywood is unknown. Therefore, the present invention uses an oil palm trunk, and an oil palm material joining composition capable of joining laminated plywood without adding a component different from the component inherent to the oil palm itself, and its joining The provision of the method is a second problem.

And from what is commonly called laminated plywood, lauan laminated plywood called veneer, Chinese plywood, pine, cedar, etc., where the Chinese material is pasted on the surface of the lauan plywood There are conifer plywood. Lauan plywood has been used for a long time, but formaldehyde-based adhesives are used for the bonding, and the vaporized component is a cause of sick house syndrome that adversely affects the human body. Therefore, not only the shortage of raw materials, but also the formaldehyde adhesive is disliked. The same is true for China plywood because it uses Lauan plywood. In addition, softwood plywood has a problem in that a large number of cracks are formed in the thin plate, and the use of an adhesive must be increased. Therefore, the existence of a laminated plywood that suppresses the use of formaldehyde-based adhesive that causes sick house syndrome is desired. In addition, when an adhesive different from a formaldehyde adhesive that causes sick house syndrome is used, the cost increases.
Therefore, the present invention suppresses the use of formaldehyde-based adhesives that cause sick house syndrome, suppresses the use of formaldehyde-based adhesives that cause sick house syndrome, and oil palm itself has inherent components The third problem is to provide a laminated plywood utilizing the above. Furthermore, there is little loss of materials to be used, the cost is reduced, the use of formaldehyde-based adhesives that cause sick house syndrome is suppressed, and a method for producing a laminated plywood that uses components inherent in oil palm Providing is the fourth issue.

In the oil palm compact according to the invention of claim 1, a predetermined width and a predetermined width from an oil palm material or a predetermined length of oil palm trunk in which a predetermined length of an oil palm trunk is peeled from its outer periphery to a predetermined thickness by a rotary race Similar to the wood of thickness and length, a plurality of the oil palm materials are stacked and consolidated by the oil palm material that has been cut by lumbering, and each oil thickness is 1 mm or more, so that the oil palm itself is contained. The resin component and the sugar component are joined so as not to be partially deficient.
Here, the oil palm material, that is, the peeling plate is formed by peeling the oil palm trunk to a predetermined thickness with a rotary race while rotating the oil palm trunk in the circumferential direction, that is, a thin plate as a thin plate. This means using a plate that has been peeled off to a predetermined thickness by a rotary race.

Further, the temperature of the oil palm material is increased, and the oil palm material is compressed by applying a compressive force in a direction perpendicular to the surface of the oil palm material, and the oil palm material is stacked and consolidated. The temperature rise of the oil palm material when integrally joined to the plywood may be either steam heating or hot plate heating, and both may be used simultaneously, and the compression pressure is applied to the oil palm on the joining surface. It is only necessary that the resin component such as lignin contained in the trunk itself and sugars such as cellulose and hemicellulose can be derived.
In addition, since the oil palm material has the capability to shape | mold on the uneven surface opposite to an uneven surface in this joining, the mechanical joining using the shaping | molding capability is also included.
When carrying out the present invention, a plurality of oil palm materials can be stacked and consolidated to form a columnar or plate-shaped oil palm consolidated material.

Particularly, a plurality of the oil palm materials are joined by the resin component and sugar component contained in the oil palm itself by controlling the temperature and compressive force of the oil palm material, and integrally formed as a laminated plywood. At this time, by controlling the temperature and compressive force of the oil palm material, a plurality of the oil palm materials are integrally joined by the action of a resin component such as lignin contained in the oil palm itself and a sugar such as cellulose and hemicellulose. Is. In particular, hemicellulose has a function of binding lignin and cellulose and can be firmly joined.

For example, if the thickness before compression is 2.5 mm and the compression ratio is 65%, the material that has been consolidated is 0.88 mm. However, in this state, the oil palm fiber is thick with a diameter of 0.4 to 1.2 mm, and a long-life oil palm compact is not obtained due to factors such as strong formation of voids in the joint area. However, if the thickness before compression is 3 mm and the compression ratio is 65%, the material subjected to consolidation is 1.05 mm. In this state, even if the oil palm fiber is as thick as 0.4 to 1.2 mm in diameter and strong, the resin component such as lignin and cellulose from the side of the release plate having a thickness of 3 mm before the compacting process to the bonding area, cellulose, Saccharides such as hemicellulose are supplied, and voids are not formed, resulting in a long-life oil palm compact. Therefore, the thickness of the oil palm material only needs to be a thickness of 1 mm or more in a state of being compacted.
Here, the compacting means that the oil palm material is compressed at a predetermined temperature, cooled and fixed so as to maintain the compressed state, and compression means a state in which pressure is simply applied. .

The oil palm material joining composition according to the invention of claim 2 forms a thin oil palm material by peeling a predetermined length of the oil palm trunk from the outer periphery to a predetermined thickness while rotating the oil palm trunk in the circumferential direction, Drying the oil palm material peeled at the predetermined thickness, laminating a predetermined number of layers, raising the temperature of the oil palm material, and the laminated oil palm material with respect to the surface of the oil palm material In the oil palm material joining composition in which a compressive force in a right angle direction is applied and compacted to join the laminated plywood, the oil palm material integrally joined to the oil palm material is peeled off to a predetermined thickness. The surface of the palm material is a bonding surface having an adhesive function, and the oil palm itself contains the plurality of oil palm materials by controlling the temperature and compressive force of the plurality of thin plates. It is obtained by the resin component and sugar component.
Here, a predetermined length of oil palm trunk, that is, a thin oil palm material is formed by rotating the oil palm trunk from the outer periphery to a predetermined thickness while rotating the oil palm trunk in the circumferential direction is determined by the rotary race. This means using oil palm material that has been peeled to a thickness of.

Further, drying the thin oil palm material peeled at the predetermined thickness and laminating a predetermined number of layers means laminating after the entire surface of the thin plate is uniformly dried.
The temperature of the thin plate is increased, and the laminated thin plate is compressed by applying a compressive force in a direction perpendicular to the surface of the thin plate, and the thin plate is integrally joined to the laminated plywood. The temperature rise may be any of electric heating, steam heating or hot plate heating, and both can be used simultaneously.
Further, the joining composition that is integrally joined as the laminated plywood is composed of a resin component and a sugar component contained in the oil palm itself by controlling the temperature and compressive force of the plurality of thin plates. To join and integrate the laminated plywood, by controlling the temperature and compressive force of the plurality of thin plates, by the action of resin components such as lignin contained in the oil palm itself and sugars such as cellulose and hemicellulose It means that a plurality of oil palm materials are joined and integrated as the laminated plywood. In particular, hemicellulose has a function of binding lignin and cellulose and can be firmly joined.
In addition, since the oil palm material has the capability to shape | mold on the uneven surface opposite to an uneven surface in this joining, the mechanical joining using the shaping | molding capability is also included.
In the case of carrying out the present invention, the compacting means that the oil palm material is stacked and compressed at a predetermined temperature, cooled and fixed so as to maintain the compressed state, and compression is It simply means a state where pressure is applied.

The oil palm material joining composition according to the invention of claim 3 forms a thin oil palm material by peeling a predetermined length of oil palm trunk from the outer periphery to a predetermined thickness with a rotary race while rotating it in the circumferential direction. The oil palm material peeled off at the predetermined thickness is dried, and a predetermined number of layers are laminated, the temperature of the oil palm material is increased, and the laminated oil palm material is placed on the surface of the oil palm material. When compressing by applying a compressive force in a direction perpendicular to the laminated plywood and joining the laminated plywood, the joining composition integrally joined to the laminated plywood is controlled by controlling the temperature and compressive force of the plurality of thin plates. A sheet of oil palm material is formed by a resin component and a sugar component contained in the oil palm itself.

Here, a thin oil palm material is formed by stripping a predetermined length of oil palm trunk from the outer periphery to a predetermined thickness with a rotary race while rotating in the circumferential direction. It means that a thin plate is used after being peeled off.
Further, drying the oil palm material peeled off at the predetermined thickness and laminating a predetermined number of layers means laminating after the entire surface of the thin plate is uniformly dried.
The temperature of the thin plate is increased by increasing the temperature of the thin plate, and compressing the laminated thin plates by applying a compressive force in a direction perpendicular to the surface of the thin plate so as to be integrally joined to the laminated plywood. Any of electric heating, steam heating or hot plate heating may be used, and both may be used simultaneously.
Furthermore, the joining composition that is integrally joined to the laminated plywood joins the plurality of thin plates with a resin component and a sugar component contained in the oil palm itself by controlling the temperature and compressive force of the plurality of thin plates. The laminated plywood is integrally formed by controlling the temperature and compressive force of the plurality of thin plates, by the action of resin components such as lignin contained in the oil palm itself and sugars such as cellulose and hemicellulose. It means that a single piece of oil palm material is joined and joined together as the laminated plywood. In particular, hemicellulose has a function of binding lignin and cellulose, and can be firmly integrated.
In addition, since the thin plate of an oil palm trunk has the capability to shape | mold into the uneven surface opposite to an uneven surface in this joining, the mechanical joining using the shaping | molding capability is also included.

In the joining composition of the oil palm material concerning invention of Claim 4, one sheet of the laminated plywood formed by integrally joining the oil palm material is a thin plate made of wood other than the oil palm material, and other than the oil palm material. A thin plate made of wood is integrally joined to the laminated plywood.
Here, the thin plate made of wood other than the oil palm material is one of the laminated thin plates, for example, persimmon, cedar, rice bran, bamboo leaf, rice cedar, Karamatsu, red pine, chestnut, persimmon, persimmon, persimmon It means a thin plate material utilizing the grain of cherry, cherry blossom, cocoon, etc., and it is arranged on the exposed surface on one side. Also, one piece of laminated plywood formed by integrally joining the oil palm material is peeled off from the outer periphery to a predetermined thickness with a rotary race while rotating a wood other than the oil palm material, for example, a lauan material trunk in the circumferential direction. A thin plate (corresponding to one layer of a veneer plate).

The oil palm material joining method according to the invention of claim 5 is a method in which a predetermined length of an oil palm trunk is rotated in the circumferential direction while being peeled off from the outer periphery to a predetermined thickness by a rotary race to form a plurality of oil palm material thin plates. A thin plate process to be formed, a thin plate drying step for drying the thin plate, a laminating step for laminating a plurality of the thin plates dried in the thin plate drying step, and the laminated thin plates after the laminating step A heating step for heating to increase the temperature of the sheet, a pressing step for applying a compressive force in a direction perpendicular to the surface of the thin plate to the laminated thin plates heated by the heating step, and a predetermined step in the pressing step After pressing for a period of time, a fixing step of lowering the temperature supplied in the heating step is provided.
Here, the thin plate process is a process in which a predetermined length of oil palm trunk is peeled off from the outer periphery to a predetermined thickness by a rotary race while being rotated in the circumferential direction to form a thin sheet of oil palm material.
Moreover, the said thin plate drying process is a drying process of the oil palm material which dries the said thin plate, and may be the same process as the process formed in the said thin plate, or another process.
And the said lamination | stacking process is a process of laminating | stacking several sheets of the dried oil palm materials of the said thin plate in a predetermined state, Usually, it is used in the unit of 2 thru | or 5 sheets, but should just be 2 or more .
Furthermore, the heating step is a step of heating to raise the temperature of the laminated oil palm material after the laminating step, and is a step of introducing steam or heating with a hot plate.
Furthermore, the pressing step is a step of applying a compressive force in a direction perpendicular to the surface of the laminated thin plates heated by the heating step, and compression can be performed at a predetermined compression rate. Just do it.
In addition, the fixing step is to press the predetermined time in the pressing step, lower the temperature supplied in the heating step, fix the compression state of the laminated plywood, and compress at a predetermined compression rate. It releases the compression force.
In addition, since the thin plate of an oil palm trunk has the capability to shape | mold into the uneven surface opposite to an uneven surface in this joining, the mechanical joining using the shaping | molding capability is also included.

In the method for joining oil palm materials according to the invention of claim 6, the laminating step of laminating the thin plates dried in the thin plate drying step in a predetermined state is a frame that regulates a predetermined loading surface of the surface of the thin plate. It regulates up and down and left and right.
Here, in the laminating step of laminating the thin plate in a predetermined state, an external force is applied in the surface direction of the thin plate. At that time, when the thin plate extends in a direction perpendicular to the surface to which the compressive force is applied, the laminated plywood Depending on the position, a thick part and a thin part are generated. In order to prevent this, the expansion in the direction perpendicular to the surface to which the compressive force is applied is restricted.

In the joining method of the oil palm material according to the invention of claim 7, in the laminating step of laminating a plurality of the thin plates in a predetermined state, one of the thin plates laminated is a thin plate made of wood other than oil palm, A thin plate made of wood other than the oil palm is integrally joined to the laminated plywood.
Here, the thin plate made of wood other than oil palm as one of the laminated thin plates is, for example, persimmon, cedar, rice bran, bamboo leaf, rice cedar, Chinese pine, red pine, chestnut, persimmon, persimmon, persimmon, It means a thin plate made of wood that uses the grain of cherry, cocoons, cocoons, etc., and means that it is arranged on one exposed surface. The said thin board | plate material is joined by the adhesive capability of oil palm. Moreover, one piece of the laminated plywood formed by integrally joining the oil palm material was peeled off from the outer periphery to a predetermined thickness with a rotary race while rotating a wood other than oil palm, for example, a lauan material trunk in the circumferential direction. A thin plate (corresponding to one layer of a veneer plate) can be a single sheet on the exposed surface side.

The laminated plywood according to the invention of claim 8 is one sheet after being subjected to one or more consolidation processes formed by peeling a predetermined length of oil palm trunk in the circumferential direction from the outer periphery to a predetermined thickness with a rotary race. An oil palm material with a thickness of 1 mm or more, and a lauan thin plate, a Chinese thin plate, a coniferous thin plate formed by peeling a predetermined length of lauan or a Chinese or coniferous trunk from the outer periphery to a predetermined thickness while rotating in the circumferential direction. One or more of these are arranged facing the oil palm material, and are joined together.

Here, the one or more oil palm materials are thin plates formed by peeling a predetermined length of oil palm trunk to a predetermined thickness with a rotary race while rotating in the circumferential direction. One or more oil palm materials having a thickness are sufficiently capable of being joined to each other. When the thickness of one piece that has been consolidated is 1 mm or more, the oil palm material of 2.5 to 3.0 mm before the consolidation process is a boundary line that ensures the properties as a laminated plywood with a compression ratio of 65%. Because it is, it has been identified. Moreover, since the quantity of the resin component and sugar component which oil palm itself in the case of joining is ensured even if it does not use another adhesive agent, it is specified. Of course, since the oil palm material has the ability to be molded into a concave and convex surface opposite to the concave and convex surface, mechanical joining using the molding capability is also included.
Further, any one of Lauan thin plate, China thin plate, coniferous thin plate arranged to face one or more oil palm materials can be any one of Lauan thin plate, China thin plate, conifer thin plate, It can also be made from any one of Lawan thin plate, China thin plate, and coniferous thin plate. Moreover, it can also be set as one or more each from 2 types or 3 types in any one of Lauan thin plate, China thin plate, and conifer thin plate.
Consolidation refers to compressing a base material such as oil palm material by applying a predetermined compressive force under a predetermined temperature condition, and releasing the pressure by lowering the temperature to a predetermined temperature after a predetermined time has elapsed. This is a process of compressing the base material at a predetermined compression rate by immobilization.

By the way, the oil palm tree trunk is not particularly limited in its varieties and production areas, etc. Usually, a tree trunk in which fruit productivity has dropped, a tree trunk over 20 years old, for replanting cultivation and planned cultivation The trunk to be discarded is used, but a young trunk may be used.
Moreover, the drying method of the thin plate obtained as the oil palm material is not particularly limited, and may be naturally dried or artificially dried, but artificial drying is more expensive. is there.

Here, wood such as Lauan, which is generally used for building materials, forms a secondary xylem composed of cell (dead cell) tissue in which the movement of water and nutrients has stopped, whereas oil palm The trunk of this is composed only of primary tissues of vascular bundles and parenchymal cells, and most of the cells centering on parenchymal cells are living cells in which water and nutrients are actively transferred, so the water content is extremely high. In addition, the oil palm trunk is rich in saccharides (eg, fructose, glucose, fructooligosaccharides, inositol, etc.). For this reason, when the thickness of the oil palm material from the oil palm trunk is thick, bacteria such as mold are proliferated and corroded easily by natural drying, and productivity and commercial value are impaired. On the other hand, when artificially drying, the cost becomes high. Therefore, according to the experimental study by the present inventors, by setting the thickness of the oil palm material within the range of 3 mm to 35 mm, the product value and productivity due to bacteria such as mold are not reduced even in natural drying, It has been confirmed that the cost can be reduced.

Furthermore, laminating a plurality of sheets in a direction perpendicular to the fiber direction of the oil palm material means that the layers are laminated in a direction perpendicular to the fiber length direction, that is, a surface other than the end face and the end face of the fiber. The layers may be laminated with the same direction, the fiber directions may be perpendicular to each other, and the number of the sheets may be an odd number or an even number. Further, the number of stacked layers may be two or more.
In addition, heating and compressing the entire thickness of the dried oil palm material by applying an external force in a direction perpendicular to the fiber direction in the heated state means compressing in the loading direction of the oil palm material and at least the end face This means that the area corresponding to is reduced, that is, the so-called compression direction is specified and compacted. This consolidation process can be formed by, for example, setting the moisture content of the oil palm material to be substantially uniform, heating and compressing under a predetermined condition, and fixing, and this is a predetermined condition at this time. The temperature, pressure, time, compression speed, and the like are determined in advance by experiments or the like using the target compression ratio and the like as parameters.

And the said oil palm material is joined by the said compaction process, and the whole air-dry specific gravity is 0.8 or more, and the thin board laminated | stacked on the several sheets was joined mutually by the compaction process, without using an adhesive agent. It means that the air-drying specific gravity of the whole laminated wood in the state is 0.8 or more.
Here, the air-dry specific gravity is the specific gravity when the wood is dried in the air, and is usually expressed by the specific gravity when the moisture content is 15%, and water having the same volume as the weight when the wood is dried. It is the value which compared the weight of. The larger the value, the heavier, the smaller the lighter.

In addition, the air-drying specific gravity of the entire compacted by compaction processing is 0.8 or more, as a result of repeated experiments by the inventors, the oil palm material is highly compressed and the air-drying specific gravity is 0.8 or more As a result, the properties of oil palm are changed and the hardness is remarkably increased. It was set based on knowledge. In other words, it is a characteristic area where the strength and hardness are increased by compression and the variation in physical properties is reduced, indicating that it is a characteristic of compacted wood. In which the air-drying specific gravity does not exceed 0.8 is not included. More preferably, when the air-dry specific gravity is 0.9 or more, the hardness is remarkably increased, and the physical stability is further increased due to less variation in physical properties and characteristic values such as hardness and dimensional change rate. become.
The air-drying specific gravity is ultimately set in consideration of cost, required strength and hardness, etc., but if the compression ratio is too high to increase the air-drying specific gravity, the wood is composed. Since the fiber to be broken is broken and a commercial property is lost, the value of the air-dry specific gravity measured immediately before the crack is generated by high compression becomes the maximum value. That is, the upper limit of the air-dry specific gravity in the present invention is the compression limit of the compacting process, and the maximum value is a finite value. In addition, the numerical value of the air-dry specific gravity is not required to be strict, but is approximate. Naturally, it is an approximate value including an error by measurement or the like, and does not deny an error of several percent.

The laminated plywood according to the invention of claim 9 is formed by rotating a predetermined length of oil palm trunk in the circumferential direction and peeling it to a predetermined thickness with a rotary race, and the thickness of one sheet after consolidation is 1 mm or more A lauan thin plate, a Chinese thin plate, a coniferous thin plate, which is formed by peeling a predetermined length of lauan or Chinese or coniferous tree trunks from the outer periphery to a predetermined thickness with a rotary race while rotating them in the circumferential direction. One or more of these are arranged facing the oil palm material, and are joined together. Of course, in this case as well, since the oil palm material has the ability to be molded into a concave and convex surface opposite to the concave and convex surface, mechanical joining utilizing the molding capability is also included.
Here, the oil palm material has a thickness of 1 mm or more after being compacted, so that the bonding force between them is maintained. In addition, any one of Lauan board, China board, and softwood board formed by peeling to a predetermined thickness facing the oil palm material is a predetermined temperature condition using a resin component and a sugar component contained in the oil palm material. Then, it may be compressed and fixed and joined together, or it is bonded using one of lauan, sina, and softwood boards that are peeled to a predetermined thickness facing the oil palm material and other adhesive May be.

In the laminated plywood according to the invention of claim 10, a predetermined length of oil palm trunk is formed by peeling off from the outer periphery to a predetermined thickness with a rotary race while rotating in the circumferential direction, and one piece after the consolidation processing A lauan thin plate, a Chinese thin plate, or a coniferous thin plate in which a plurality of oil palm materials each having a thickness of 1 mm or more and a predetermined length of lauan or a Chinese or coniferous trunk are formed in a plate shape in the length direction of the trunk Are arranged so as to face the oil palm material, and they are joined together.

Here, the one or more oil palm materials are thin plates formed by peeling a predetermined length of oil palm trunk to a predetermined thickness with a rotary race while rotating in the circumferential direction. One or more oil palm materials having a thickness are sufficiently capable of being joined to each other. When the thickness of one piece that has been consolidated is 1 mm or more, the oil palm material of 2.5 to 3.0 mm before the consolidation process is a boundary line that ensures the properties as a laminated plywood with a compression ratio of 65%. Because it is, it has been identified. Moreover, since the quantity of the resin component and sugar component which oil palm itself in the case of joining is ensured even if it does not use another adhesive agent, it is specified. Of course, since the oil palm material has the ability to be molded into a concave and convex surface opposite to the concave and convex surface, mechanical joining using the molding capability is also included.
In addition, one or more of Lauan, China, or conifers in which a predetermined length of Lauan or Sina or coniferous trunk is formed in a plate shape in the length direction of the trunk is disposed facing the oil palm thin plate, The term “integrally joining” refers to joining any one of Lauan, China, and coniferous plates regardless of compression or compression.

In the laminated plywood according to the invention of claim 11, one or more oil palm materials arranged facing the oil palm material and joined together, and one or more of either a lauan plate, a china plate or a softwood plate The laminated plywood that is integrally joined with the resin is obtained by using the resin component and the sugar component contained in the oil palm material for the joining, compressing and fixing them, and joining them integrally.
Here, the oil palm material contains at least the joining surfaces of at least one of the lauan plate, the china plate, and the softwood board to be joined to the one or more oil palm materials. A resin component and a sugar component are used. Of course, the oil palm material has the ability to be formed into a concave and convex surface opposite to the uneven surface, and therefore includes mechanical joining utilizing the forming ability. Of course, in this case as well, since the oil palm material has the ability to be molded into a concave and convex surface opposite to the concave and convex surface, mechanical joining utilizing the molding capability is also included.

The method for producing a laminated plywood according to the invention of claim 12 is formed into a plurality of thin oil palm members by peeling a predetermined length of oil palm trunk to a predetermined thickness with a rotary race blade while rotating the oil palm trunk in the circumferential direction. Oil palm material formed in both steps, comprising a step and a step of peeling a stem other than oil palm of a predetermined length in a circumferential direction while rotating a trunk other than a predetermined length with a blade to a predetermined thickness with a blade. And the other oil palm material other than oil palm is dried, and a plurality of the thin oil palm materials and other oil palm materials other than oil palm are laminated in a predetermined state, and the laminated oil palm material and other oil palm are laminated. The oil palm is heated to raise the temperature of the other thin plate, and the heated oil palm material and the thin oil palm other than the oil palm are added to the oil palm. And a predetermined time by applying a compressive force in a direction perpendicular to the surface of the thin sheet other than the oil palm material and the other oil palm while restricting extending in a direction parallel to the surface of the thin sheet other than the oil palm. The oil palm material compressed and compressed for a predetermined time and the thin plate other than oil palm are cooled and fixed by lowering the temperature supplied in the heating step.

Here, the thin plate step includes a step of forming a plurality of oil palm materials by peeling a predetermined length of the oil palm trunk from the outer periphery to a predetermined thickness with a rotary race blade while rotating the oil palm trunk in the circumferential direction, and a predetermined length of oil. It consists of a process of rotating a trunk other than palm in the circumferential direction with a rotary lace cutter to a predetermined thickness from the outer periphery to form a thin sheet, and is not limited to one that progresses simultaneously. It may be formed at the position.
The drying step is to dry a thin plate other than the oil palm material and the other oil palm formed in the thin plate step, and the thin plate other than the oil palm material and the other oil palm may be separately dried, You may dry simultaneously.
Moreover, the said lamination | stacking process laminates | stacks two or more thin sheets other than the oil palm material and other oil palm dried at the said drying process in a predetermined state, The lamination order position is not specifically limited.
And the said heating process heats to raise the temperature of the thin board other than the laminated | stacked oil palm material and other oil palm after the said lamination | stacking process.
Further, the compressing step is parallel to a surface of the laminated sheet of the oil palm material and other oil palm heated by the heating step with respect to a surface of the thin plate other than the oil palm material and other oil palm. While restricting extending in the direction, a compression force in a direction perpendicular to the surface of the thin plate other than the oil palm material and the other oil palm is applied and compressed for a predetermined time.
Furthermore, in the fixing step, the oil palm material compressed in the compression step for a predetermined time and other thin plates other than oil palm were cooled and compressed by lowering the temperature supplied in the heating step. The form is fixed.

A method for manufacturing a laminated plywood according to the invention of claim 13 is to form a plurality of oil palm trunks having a predetermined thickness by peeling a plurality of oil palm trunks with a rotary race blade while rotating a predetermined length of the oil palm trunk in the circumferential direction. Drying the formed oil palm material, laminating a plurality of dried oil palm materials in a predetermined state, heating to raise the temperature of the laminated oil palm material after the lamination step, the heated The laminated oil palm material is compressed for a predetermined time by applying a compression force in a direction perpendicular to the surface of the oil palm material in a state in which the oil palm material is restricted from extending in a direction parallel to the surface of the oil palm material. The oil palm material compressed for a predetermined time in the compression step is cooled and fixed by lowering the temperature supplied in the heating step and decompressed.

Here, the thin plate step includes a step of forming a plurality of oil palm materials by rotating the oil palm trunk of a predetermined length in a circumferential direction while peeling it with a blade to a predetermined thickness with a rotary race. .
The drying step is a step of drying the oil palm material formed in the thin plate step. Moreover, the said lamination | stacking process laminates | stacks the said oil palm material dried at the said drying process in a predetermined | prescribed state, The lamination order position is not specifically limited.
And the said heating process heats it so that the temperature of the said oil palm material laminated | stacked after the said lamination process may be raised.
Further, the compression step is performed on the surface of the oil palm material while restricting the laminated oil palm material heated by the heating step from extending in a direction parallel to the surface of the oil palm material. On the other hand, compression is performed for a predetermined time by applying a compressive force in a right angle direction.
Furthermore, the said fixing process lowers the temperature which supplied the said oil palm material compressed by the said compression process for the predetermined time at the said heating process, and fixes the compressed form.

By the way, as the trunk of the oil palm, its varieties, production areas, etc. are not particularly limited. Usually, the trunk of which fruit productivity has dropped, the trunk of more than 20 years, replanting cultivation or planned cultivation Therefore, a trunk that is scheduled to be discarded is used, but a trunk that is young may be used.
Moreover, the drying method of the thin plate obtained as the oil palm material is not particularly limited, and may be naturally dried or artificially dried, but artificial drying is more expensive. is there.
Here, wood such as Lauan, which is generally used for building materials, forms a secondary xylem composed of cell (dead cell) tissue in which the movement of water and nutrients has stopped, whereas oil palm The trunk of this is composed only of primary tissues of vascular bundles and parenchymal cells, and most of the cells centering on parenchymal cells are living cells in which water and nutrients are actively transferred, so the water content is extremely high. In addition, the oil palm trunk is rich in saccharides (eg, fructose, glucose, fructooligosaccharides, inositol, etc.). For this reason, when the thickness of the oil palm material is large, bacteria such as mold are proliferated and corroded in natural drying, and productivity and commercial value are impaired. On the other hand, when artificially drying, the cost becomes high. Therefore, according to the experimental study by the present inventors, by reducing the thickness of the oil palm material obtained from the oil palm trunk within the range of 3 mm to 35 mm, the product value and productivity are reduced by bacteria such as mold even in natural drying. It has been confirmed that the cost can be reduced without incurring cost.

In addition, the overall air-dry specific gravity of 0.8 or more by compaction processing, as a result of repeated experiments by the present inventors, by highly compressing the oil palm material to make the air-dry specific gravity 0.8 or more Based on this finding, we found that the properties of oil palm change and the hardness becomes significantly higher, and that there is less variation in physical properties and characteristic values such as strength, hardness, dimensional change rate, etc., and physical stability increases. Is set. In other words, it is a characteristic area where the strength and hardness are increased by compression and the variation in physical properties is reduced, indicating that it is a characteristic of compacted wood. In which the air-drying specific gravity does not exceed 0.8 is not included. More preferably, when the air-dry specific gravity is 0.9 or more, the hardness is remarkably increased, and the physical stability is further increased due to less variation in physical properties and characteristic values such as hardness and dimensional change rate. become.
The air-drying specific gravity is ultimately set in consideration of cost, required strength and hardness, etc., but if the compression ratio is too high to increase the air-drying specific gravity, the wood is composed. Since the fiber to be broken is broken and a commercial property is lost, the value of the air-dry specific gravity measured immediately before the crack is generated by high compression becomes the maximum value. That is, the upper limit of the air-dry specific gravity in the present invention is the compression limit of the compacting process, and the maximum value is a finite value. In addition, the numerical value of the air-dry specific gravity is not required to be strict, but is approximate. Naturally, it is an approximate value including an error by measurement or the like, and does not deny an error of several percent.

In the method for manufacturing a laminated plywood according to the fourteenth aspect of the invention, the thin plate step is such that the number of the oil palm materials is larger than the number of thin plates other than oil palm.
Here, the fact that the number of the oil palm materials is larger than the number of the thin plates other than the oil palm means that the amount of the resin component and the sugar component contained in the oil palm material is ½ compared to the conventional one. It is as follows.

The oil palm compact of claim 1 is an oil palm material that is peeled off from the outer periphery to a predetermined thickness while rotating the oil palm trunk of a predetermined length in the circumferential direction, a predetermined width and thickness from the oil palm trunk of a predetermined length, In the oil palm material in which the cutting of the length is performed in the same manner as wood, a plurality of the oil palm materials are joined together by a resin component and a sugar component contained in the oil palm itself.
Therefore, the surface of the oil palm material stripped to a predetermined thickness is a joint surface having an adhesive function, and the oil palm itself contains the plurality of oil palm materials by controlling the temperature and compression force of the oil palm material. It is joined with a resin component such as lignin obtained by compacting to a thickness of about 1 mm or more and a saccharide component such as cellulose or hemicellulose.

Therefore, the oil palm trunk has no nodes and no annual rings, and when stripping off a predetermined thickness from the outer periphery with a rotary race, a predetermined width, thickness and length are taken from the oil palm trunk of a predetermined length. When producing a sawn board, a uniform release plate without any knot, and an oil palm material as a lumber board are obtained. It will be something. Moreover, since the joining force is changed by the resin component and sugar component contained in the oil palm itself depending on the applied temperature and compressive force, an arbitrary adhesive force can be obtained by controlling the applied temperature and compressive force. And, since the laminated plywood is formed by joining the plurality of oil palm materials with a resin component and a sugar component contained in the oil palm itself, other synthetic resins and synthetic rubbers are used as adhesives. Because it does not cause pollution problems that can be returned to nature. Furthermore, since the air gap between the release plates is almost eliminated by the compressive force when the oil palm itself contains the resin component and the sugar component, and the dense structure is formed, it has water resistance and is waterproof and insect-proof. It is rich in properties and has a long service life even when used as a building material.

Moreover, also when forming a wide plane board, a wide board is obtained by connecting the said oil palm material sideways.
And the temperature of the said oil palm material at the time of raising the temperature of the said oil palm material, applying and compressing the compression force of a right angle direction with respect to the surface of the said oil palm material, and joining to the said laminated plywood integrally The rise may be either steam heating or hot plate heating, and both may be used simultaneously, and the compression pressure is such as resin components such as lignin contained in the oil palm itself on the joint surface, cellulose, hemicellulose, etc. Since it is only necessary to be able to guide saccharides, the degree of freedom in production is high.
In addition, since the oil palm material has the capability to shape | mold on the uneven surface opposite to an uneven surface in this joining, the mechanical joining using the shaping | molding capability is also included.

The oil palm material joining composition according to claim 2 forms a thin oil palm material by peeling a predetermined length of oil palm trunk from the outer periphery to a predetermined thickness with a rotary race while rotating the oil palm trunk in the circumferential direction. The oil palm material peeled at a thickness of is dried, laminated a predetermined number of times, the temperature of the oil palm material is raised, and the laminated oil palm material is made to the surface of the oil palm material The oil palm material is integrally bonded by compressing in the stacking direction by applying a compressive force in a right angle direction, and at this time, the bonding composition for integrally bonding the oil palm material has a predetermined thickness. The peeled surface of the oil palm material is used as a bonding surface having an adhesive function, and the plurality of oil palm materials are controlled by controlling the temperature and compressive force of the plurality of oil palm materials. Resin components and cellulose lignin such as palm itself contains, is obtained by the saccharide component of the hemicellulose and the like.

Therefore, since the oil palm trunk has no nodes or annual rings, when the oil palm material is created by peeling off from the outer periphery to a predetermined thickness by a rotary race, a homogeneous oil palm material without nodes is obtained, and as a result, the oil Laminated plywood made of palm material is homogeneous. Moreover, since the joining force is changed by the resin component and sugar component contained in the oil palm itself depending on the applied temperature and compressive force, an arbitrary adhesive force can be obtained by controlling the applied temperature and compressive force. And, since the laminated plywood is formed by joining the plurality of oil palm materials with a resin component and a sugar component contained in the oil palm itself, other synthetic resins and synthetic rubbers are used as adhesives. It does not cause pollution problems because it can be returned to nature. Furthermore, the compression force when joined by the resin component and sugar component contained in the oil palm itself eliminates the gaps in the thin plate, resulting in a dense structure, so that it has water resistance and is waterproof and insect-proof. It has a long service life even when used as a building material. In addition, since the oil palm material has the capability to shape | mold on the uneven surface opposite to an uneven surface in this joining, the mechanical joining using the shaping | molding capability is also included.

The joining composition of the oil palm material according to claim 3 forms a thin oil palm material by peeling a trunk of a predetermined length of oil palm in the circumferential direction to a predetermined thickness from the outer periphery with a rotary race. The oil palm material peeled at a thickness of is dried, laminated a predetermined number of times, the temperature of the oil palm material is raised, and the laminated oil palm material is made to the surface of the oil palm material In the oil palm material joining composition that compresses by applying a compressive force in a right angle direction and integrally joins to the laminated plywood, the joining composition that integrally joins the oil palm materials includes the plurality of oil palm materials. Resin components such as lignin and the saccharides such as cellulose and hemicellulose containing the plurality of oil palm materials by controlling the temperature and compressive force of the oil palm itself It is obtained by the component.

Therefore, since the oil palm trunk has no nodes and no annual rings, when a thin oil palm material is made by peeling it off from the outer periphery with a rotary race, a uniform thin plate without nodes is obtained. Laminated plywood made of oil palm material is homogeneous with no nodes. Moreover, since the joining force is changed by the resin component and sugar component contained in the oil palm itself depending on the applied temperature and compressive force, an arbitrary adhesive force can be obtained by controlling the applied temperature and compressive force. And, since the laminated plywood is formed by joining the plurality of oil palm materials with a resin component and a sugar component contained in the oil palm itself, other synthetic resins and synthetic rubbers are used as adhesives. Because it does not cause pollution problems that can be returned to nature. Furthermore, because of the compressive force when joined by the resin component and sugar component contained in the oil palm itself, there is almost no void in the oil palm material, resulting in a dense structure, water resistance, and waterproofing. It is rich in insect repellent and has a long service life even when used as a building material. In addition, since the oil palm material has the capability to shape | mold on the uneven surface opposite to an uneven surface in this joining, the mechanical joining using the shaping | molding capability is also included.

The joining composition of the oil palm material of Claim 4 makes one sheet of the laminated plywood formed by integrally joining the oil palm material a thin plate made of wood other than oil palm, and a thin plate made of wood other than the oil palm. In addition to the effects of claim 2 or claim 3, only one surface of the laminated plywood is made of another material, that is, thin wood or bamboo. be able to. In particular, it is suitable for use as a decorative board.

The method for joining oil palm materials according to claim 5 includes a thin plate step of forming a plurality of thin oil palm materials by rotating to a predetermined thickness from the outer periphery with a rotary race while rotating in the circumferential direction, and a thin plate for drying the thin plates A drying step, a laminating step of laminating a plurality of the thin plates dried in the thin plate drying step in a predetermined state, and a heating step of heating to raise the temperature of the laminated thin plates after the laminating step, A pressing step of applying a compressive force in a direction perpendicular to the surface of the thin plate heated by the heating step, and a predetermined time in the pressing step, and then supplying in the heating step And a fixing step for lowering the temperature.

Therefore, the oil palm trunk used in these processes does not have nodes and annual rings, so when creating a thin oil palm material by peeling it off from the outer periphery with a rotary race to a thin oil palm material, a homogeneous thin plate without nodes is obtained. As a result, the laminated plywood made of the oil palm material becomes homogeneous. Moreover, since the joining force can be changed by the resin component and sugar component contained in the oil palm itself depending on the applied temperature and compressive force, an arbitrary adhesive force can be obtained by controlling the applied temperature and compressive force. And, since the laminated plywood is formed by joining the plurality of oil palm materials with a resin component and a sugar component contained in the oil palm itself, other synthetic resins and synthetic rubbers are used as adhesives. It does not cause pollution problems because it can be returned to nature. Furthermore, the compression force when joined by the resin component and sugar component contained in the oil palm itself eliminates the gaps in the thin plate, resulting in a dense structure, so that it has water resistance and is waterproof and insect-proof. It has a long service life even when used as a building material. In addition, since the thin plate of an oil palm material has the capability to shape | mold into the uneven surface opposite to an uneven surface in this joining, the mechanical joining using the shaping | molding capability is also included.

In the method for joining oil palm materials according to claim 6, the laminating step of laminating the thin plates dried in the thin plate drying step in a predetermined state is a frame body that regulates a predetermined stacking surface. In addition to the effect of claim 5, the thin plate is prevented from extending in a direction perpendicular to the surface to which the compressive force is applied, and the thick ply and thin are dependent on the position of the laminated plywood. There is no point.

In the laminating step of laminating a plurality of the thin plates in a predetermined state in the method for joining oil palm materials according to claim 7, one of the laminated thin plates is a thin plate made of wood other than oil palm, and other than the oil palm In addition to the effect of claim 6, only one surface of the laminated plywood may be made of thin wood or bamboo made of other materials. it can.

The laminated plywood according to claim 8 is formed by peeling a trunk of a predetermined length of oil palm to a predetermined thickness with a rotary race while rotating it in the circumferential direction, and the thickness of one sheet after being consolidated is 1 mm or more. One or more oil palm materials and a lauan thin plate, a Chinese thin plate, or a conifer that is formed by stripping a predetermined length of lauan or china or coniferous trunk from the outer periphery to a prescribed thickness while rotating the trunk in the circumferential direction. One or more of the thin plates are arranged facing the oil palm material, compressed, fixed, and joined together.

Therefore, one or more oil palm materials and one or more of Lauan thin plate, China thin plate, or softwood thin plate are placed facing the oil palm material, and they are compressed, fixed, and joined together. Therefore, a multilayer plywood bonded with natural products using the resin component and sugar component contained in the oil palm material is obtained. Moreover, since one or more of Lauan thin plate, China thin plate, and softwood thin plate can be used as a core material or a design plate, a laminated plywood can be manufactured according to the application.
Therefore, the use of a formaldehyde-based adhesive that causes sick house syndrome is suppressed, and a laminated plywood using components that oil palm originally has is obtained.

The laminated plywood of claim 9 is formed by peeling a predetermined length of oil palm trunk from the outer periphery to a predetermined thickness with a rotary race while rotating in the circumferential direction, and the thickness of one sheet after being consolidated is 1 mm or more A laminar plate made of one or more oil palm materials and a lauan thin plate formed by peeling off a predetermined length of lauan, china or coniferous trunk from the outer circumference to a prescribed thickness while rotating the trunk of the lauan or china One or more of either a thin plate or a coniferous thin plate is arranged facing the thin plate of the oil palm material, and they are integrally joined.
Therefore, at least one sheet of the oil palm material that has been compacted and one or more of the lauan sheet, the china sheet, and the softwood sheet are arranged facing the sheet of the oil palm material, and they are integrated. Since the oil palm itself contains a resin component and a sugar component, an adhesive is added to one or more of Lauan thin plate, China thin plate, and softwood thin plate. Then, a desired laminated plywood is obtained by laminating.
Therefore, the use of a formaldehyde-based adhesive that causes sick house syndrome is suppressed, and a laminated plywood using components that oil palm originally has is obtained.

The laminated plywood of claim 10 is formed by peeling a trunk of a predetermined length of oil palm to a predetermined thickness from the outer periphery with a rotary race while rotating it in the circumferential direction, and the thickness of one sheet after being consolidated is 1 mm. One or more laminar sheets of the above-mentioned oil palm material and one or more of lauan, china, or conifer that have a predetermined length of lauan or china or coniferous tree formed into a plate shape in the length direction of the trunk They are placed facing the oil palm material and joined together.
Therefore, at least one compacted oil palm material and one or more plate materials of lauan, china, and conifer are arranged facing the oil palm material, and they are joined together. From the above, when the resin component and the sugar component contained in the oil palm material are insufficient, by adding an adhesive to one or more joining objects of Lauan, China, and coniferous trees, A laminated plywood is obtained.
Therefore, the use of a formaldehyde-based adhesive that causes sick house syndrome is suppressed, and a laminated plywood using components that oil palm originally has is obtained.

The laminated plywood according to claim 11, wherein the laminated plywood faces the oil palm material, and is integrally formed with one or more oil palm materials that are integrally joined, and one or more of a lauan plate, a Chinese plate, or a softwood plate. The laminated plywood to be joined is obtained by using the resin component and sugar component contained in the oil palm itself for joining, compressing and fixing them, and joining them integrally.
Therefore, in addition to the effect of claim 8, one or more oil palm materials and one or more of lauan boards, sina boards or softwood boards are used as laminated plywood, and the resin components contained in the oil palm materials and Since the sugar components can be joined together, the use of a formaldehyde-based adhesive that causes sick house syndrome is suppressed, and a laminated plywood using the components that oil palm originally has is obtained.

According to the method for producing a laminated plywood of claim 12, the oil palm trunk having a predetermined length is rotated in the circumferential direction, and the rotary race is peeled with a blade from the outer periphery to a predetermined thickness to form a plurality of thin oil palm members. And a step of rotating a trunk other than a predetermined length of oil palm in the circumferential direction with a rotary race to a predetermined thickness from the outer periphery with a blade to form one or more thin plates (for example, lauan plates). The oil palm material formed in the thin plate process and the thin plate other than the other oil palm are dried in the drying process. A plurality of thin sheets other than the oil palm material and other oil palms dried in the drying step are laminated in a predetermined state in the lamination step. After the laminating step, the laminated oil palm material and other thin plates other than oil palm are heated in a heating step so as to increase the temperature of the thin plate other than oil palm material and other oil palm, The compression force in the direction perpendicular to the surface of the thin plate other than the oil palm material and the other oil palm while restricting extending in a direction parallel to the surface of the thin plate other than the oil palm material and the other oil palm And compressing the oil palm material and other thin oil palm other than the oil palm compressed for a predetermined time in the compression process by lowering the temperature supplied in the heating process in the fixing process and cooling To fix.

Therefore, a plurality of oil palm materials each having a thickness of 1 mm or more when a predetermined length of an oil palm trunk is formed by peeling off to a predetermined thickness with a rotary race while rotating in the circumferential direction and then compacting it. And one or more of a lauan plate, a cinnabar plate, or a coniferous plate formed by peeling a predetermined length of lauan or china or coniferous tree in the circumferential direction while peeling it off from the outer periphery to a predetermined thickness with a rotary race Are arranged facing the oil palm material, and the whole thin plates are compressed or fixed simultaneously or separately and joined together. Therefore, it is possible to arrange a plurality of oil palm materials and one or more of lauan boards, Chinese boards, coniferous boards facing the oil palm materials, compress them, fix them, and join them together Using the resin component and sugar component contained in the oil palm material, a multilayer plywood joined with natural products can be obtained. In addition, since this oil palm material has the capability to shape | mold on the uneven surface opposite to an uneven surface, the mechanical joining using the shaping capability is also included. Moreover, since one or more of Lauan thin plate, China thin plate, and softwood thin plate can be used as a core material as a design plate, a laminated plywood can be manufactured according to the application.

In addition, the laminated oil palm material and other oil palms heated in the compression process and heated in the compression process to raise the temperature of the oil palm material and other oil palms laminated after the lamination process are heated. While restricting the thin plate other than the oil palm material and the surface of the thin plate other than the oil palm to extend in a direction parallel to the thin plate other than the oil palm material and the other thin plate other than the oil palm, Therefore, the compression force applied in the compression process is limited to extend in a direction parallel to the surface of the thin plate other than the oil palm material and the other oil palm, The compressive force of all laminated oil palm sheets can be used effectively, and the outer dimensions of the sheets other than oil palm material and other oil palm can be made uniform. Further, the compression ratio of the whole oil palm material can be a value corresponding to the species, never out waste from a plurality of oil palm materials and thin plates of other non-palm oil during manufacture.
Therefore, the use ratio of the resin component and sugar component contained in the oil palm material is increased, and a multilayer plywood bonded with a natural product is obtained, the loss of the material used is reduced, the cost is reduced, and sick house syndrome is caused. The use of formaldehyde-based adhesives can be suppressed, and a laminated plywood utilizing the components inherent in oil palm can be obtained.

According to the method for producing a laminated plywood of claim 13, the oil palm trunk having a predetermined length is rotated in the circumferential direction in the thin plate process, and is peeled with a blade from the outer periphery to a predetermined thickness by a rotary race to form a plurality of oil palm materials. Form. The thin plate formed in the thin plate step is dried in the drying step, a plurality of dried oil palm materials are laminated in a predetermined state in the lamination step, and the heating step is performed to increase the temperature of the laminated oil palm materials. Compressed by applying a compressive force in a direction perpendicular to the surface of the oil palm material, while heating and restricting the heated oil palm material to extend in a direction parallel to the surface of the oil palm material. The oil palm material compressed for a predetermined time in the step and cooled for a predetermined time in the compression step is cooled and fixed by lowering the temperature supplied in the heating step.

Since the oil palm trunk has no nodes and no annual rings, when a thin oil palm material is created by peeling it from the outer periphery to a predetermined thickness with a rotary race, an oil palm material consisting of the same thin plate with no nodes is obtained. In addition, the laminated plywood made of the thin plate is homogeneous without nodes. Moreover, since the joining force is changed by the resin component and sugar component contained in the oil palm itself depending on the applied temperature and compressive force, an arbitrary adhesive force can be obtained by controlling the applied temperature and compressive force.
Also, the temperature of the oil palm material laminated after the laminating step is heated to increase in the heating step, and the laminated oil palm material heated in the compression step is parallel to the surface of the oil palm material. Since the compression is performed for a predetermined time by applying a compression force in a direction perpendicular to the surface of the oil palm material while restricting the extension, the compression force applied in the compression process is applied to the surface of the oil palm material. Elongation to escape in parallel direction is limited, the compressive force of all laminated oil palm materials can be used effectively, and the outer dimensions of oil palm materials can be made uniform, and all oil palm materials The compression ratio of the oil palm can be made uniform, and no waste is produced from the plurality of oil palm materials during the production.

And, the plurality of thin plates are joined by a resin component and a sugar component contained in the oil palm itself to form the laminated plywood, and other synthetic resins and synthetic rubbers are not used as adhesives. Can return to nature. The oil palm leaves, empty fruit bunches, roots, etc. at this time are cut into chips and may be treated by an organic waste fermentation treatment method that is composted (composted) by aerobic bacteria treatment, In particular, empty fruit bunches may be subjected to other practical treatments. Moreover, it can also grind | pulverize finely and can extract components, such as a cellulose, hemicellulose, and lignin, and can also use it. Furthermore, the compression force when joined by the resin component and sugar component contained in the oil palm itself eliminates the gaps in the thin plate, resulting in a dense structure, so that it has water resistance and is waterproof and insect-proof. It has a long service life even when used as a building material. In addition, since the thin plate of an oil palm trunk has the capability to shape | mold into the uneven surface opposite to an uneven surface, the joining here also includes the mechanical joining using the shaping capability.

In this way, a plurality of oils each having a thickness of 1 mm or more when the oil palm trunk having a predetermined length is formed by peeling it to a predetermined thickness with a rotary race while rotating it in the circumferential direction and then compacting it. Palm material can be compressed and fixed at the same time and joined together. In particular, the temperature of the oil palm material laminated after the laminating step is heated to increase in the heating step, and the laminated oil palm material heated in the compression step is parallel to the surface of the oil palm material. Since the compression is performed for a predetermined time by applying a compression force in a direction perpendicular to the surface of the oil palm material while restricting the extension, the compression force applied in the compression process is applied to the surface of the oil palm material. Elongation of escape in the parallel direction is limited, the compressive force of all laminated oil palm thin plates can be used effectively, and the compressibility of all oil palm materials can be made uniform, during manufacture No waste from multiple oil palm materials.
Therefore, using the resin component and sugar component contained in the oil palm itself, a multi-layer plywood bonded with natural products can be obtained, the loss of the material used is reduced, the cost is reduced, and formaldehyde adhesion causing sick house syndrome The use of the agent is suppressed, and a laminated plywood using the components that oil palm originally has is obtained.

The thin plate step of the laminated plywood manufacturing method of claim 14 is obtained by increasing the number of oil palm materials than the number of thin plates other than oil palm. Thus, compared to at least conventional laminated plywood, the use of formaldehyde-based adhesive that causes sick house syndrome can be suppressed to ½ or less.

FIG. 1 is an explanatory diagram of a production process of a release plate by a rotary race in the oil palm compacted material according to the embodiment of the present invention. FIG. 2 is an explanatory view showing a stacking positional relationship of a release plate for forming a laminated plywood in the oil palm compacted material according to the embodiment of the present invention. It is explanatory drawing (b) of cutting out the oil palm material short on the vascular bundle side. FIG. 3 is an explanatory diagram showing a method of laminating a release plate for making a laminated plywood in the oil palm compacted material according to the embodiment of the present invention. FIG. 4 is an explanatory view showing a laminated state (a) and a consolidated state (b) of the laminated plywood in the oil palm compacted material according to the embodiment of the present invention. FIG. 5 is a cross-sectional view showing a schematic configuration of a compacted material manufacturing apparatus for manufacturing a laminated plywood in the oil palm compacted material according to the embodiment of the present invention. 6A and 6B are explanatory diagrams for producing a laminated plywood in the oil palm compacted material according to the embodiment of the present invention. FIG. 6A is an explanatory diagram of supply of unprocessed wood as a raw material, and FIG. (C) is an explanatory diagram according to a sealed heating compression start state, (d) is an explanatory diagram of a vapor pressure control process according to a sealed heating compression state, (e) is an explanatory diagram according to a sealed cooling state, and (f) is a consolidation. It is explanatory drawing of taking-out of the processed wood (plastic working material). FIG. 7 is an explanatory view of a frame for manufacturing a laminated plywood in the oil palm compacted material according to the embodiment of the present invention, and is a perspective view (a) and a sectional view (b) taken along a cutting line AA. FIG. 8 is an explanatory view (a) for obtaining a lumber board that has been cut from the oil palm trunk in the oil palm compacted material according to the embodiment of the present invention, an explanatory view (b) showing the fiber state of the oil palm trunk, and an oil It is explanatory drawing (c) of the lumber board which performed board cutting from the palm trunk. FIG. 9 is an explanatory view showing a joined state of a lumber board that has been cut from the oil palm trunk in the oil palm compacted material according to the embodiment of the present invention. FIG. 10 is an explanatory view showing a laminating method for forming another laminated plywood in the oil palm compacted material according to the embodiment of the present invention. Case (b). FIG. 11 is an explanatory view showing the density and size of the vascular bundle from the outer periphery of the oil palm trunk toward the center in the oil palm compacted material according to the embodiment of the present invention, where (a) divides the center from the bark into four equal parts. FIG. 4 is a photomicrograph of the outermost sampling position, (b) an adjacent position divided into four equal parts, (c) an adjacent position divided into four equal parts, and (d) a center position divided into four equal parts. FIG. 12 is a photomicrograph of a cross section of the oil palm base material in the embodiment of the present invention before the compacting process (a) and after the compacting process (b). FIG. 13 is an explanatory view showing a method of laminating a thin plate to be another laminated plywood in the joining method of oil palm thin plates according to the embodiment of the present invention, where one side is a case of a lumber plate (a) and both sides are lumber plates. Case (b). FIG. 14 is an explanatory diagram showing the lamination positional relationship of thin plates for forming a laminated plywood according to an embodiment of the present invention. It is explanatory drawing (c) of cutting out the oil palm material short on the side. FIG. 15 is an explanatory view showing a method of laminating thin plates for making a laminated plywood according to an embodiment of the present invention. FIG. 16 is a flowchart illustrating a method for manufacturing a laminated plywood according to an embodiment of the present invention. FIG. 17 is an explanatory view of a tensile strength test of a laminated plywood used in the method for producing a laminated plywood according to the embodiment of the present invention.

WD Oil palm trunk CT Cutlery W, W1,..., W5 Oil palm material UWD Continuous thin plate LD Rawan stem L Lawan thin plate PW Laminated plywood NW Multi-layer material MC before pressurization Compacted material manufacturing equipment IS Internal space 10 Press panel 10A Top Press panel 10B Lower press panel 18 Positioning hole 20 Frame body ZU, ZD Lumber plate

Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that, in the embodiments, the same symbols and the same reference numerals in the drawings are the same or corresponding functional parts, and therefore, redundant description thereof is omitted here.

[Embodiment 1]
First, the oil palm trunk used in the embodiment of the present invention, as shown in FIG. Become. In other words, there are no annual rings like Japanese timber and cedar, and fibers, ie vascular bundles with a diameter of 0.4 to 1.2 mm, are thick and strong, and oil palm trunks are like tatami mats. It extends in the length direction.

The components of the oil palm trunk vary depending on the place of production, but the difference is slight, and generally 30.6% by weight of cellulose, 33.2% by weight of hemicellulose, lignin (total lignin 28.5% by weight = Klarson lignin 24) 0.7% by weight + acid-soluble lignin 3.8% by weight), extracted component 3.6% by weight, and ash content 4.1% by weight. It is also described in Characterization in Chemical Composition of the Oil Palm (Elaeis guineensis) (Journal of the Japan Institute of Energy, 87, 383-388 (2008)).
Between the vascular bundle K having a diameter of 0.4 to 1.2 mm (see FIGS. 11 and 12) and the vascular bundle, parenchymal cells J formed by resin components such as lignin, sugars such as cellulose and hemicellulose, pores, etc. It has become.

The formation of the oil palm material W stripped in a thin plate shape constituting the laminated plywood according to the present embodiment will be described with reference to FIG.
The oil palm material W is called a rotary race that cuts a single trunk that has grown for 20 to 30 years or more as a predetermined length of an oil palm trunk WD and peels it in the circumferential direction similar to wig removal of a radish. Set in the device. Then, the oil palm trunk WD is rotated to perform circumferential stripping with the blade CT. This is a peeling plate process in which a predetermined length of the oil palm trunk WD is rotated in its circumferential direction and is peeled off from the outer periphery to a predetermined thickness by a rotary race to form a plurality of oil palm members W.

That is, as shown in FIG. 1, the center of the oil palm trunk WD is rotated so as to be an axial center, a cutter CT having a predetermined width is applied to the outer peripheral side, and the continuous peeling plate UWD is peeled in the same manner as the wig peeling. It is formed. That is, the oil palm trunk WD is cut out from the continuous oil palm material, that is, the continuous peeling plate UWD, with a predetermined thickness like radish wig peeling. The continuous peeling plate UWD is cut into a predetermined length and dried to produce an oil palm material W having a predetermined area and a predetermined thickness.
Oil palm leaves, empty fruit bunches, roots, and the like are cut into chips and treated by an organic waste fermentation treatment method in which they are composted (composted) by aerobic bacteria treatment. In particular, empty fruit bunches may be subjected to other practical treatments. Moreover, it may grind | pulverize finely and may extract components, such as a cellulose, hemicellulose, and lignin.

Usually, when the continuous peeling plate UWD is peeled off, the drying is started. However, the oil palm material W having a predetermined area and thickness may be obtained, and drying may be performed after cutting the number of units for forming a predetermined laminated plywood. In general, since the cutting is performed by a flow operation, it is desirable from the viewpoint of ensuring the drying time that drying is started when the continuous release plate UWD is formed from the oil palm trunk WD. In this drying step, the continuous peeling plate UWD is cut when drying is performed after the oil palm materials W1,. It is desirable because sometimes it becomes difficult to generate chips at the end, but there is no significant difference after the point when the continuous release plate UWD is formed from the oil palm trunk WD. In any case, the process of drying these oil palm materials W is a drying process.

The oil palm material W having a predetermined area and a predetermined thickness is cut into five pieces of oil palm materials W1,..., W5 having a predetermined area and a predetermined thickness as shown in FIG. In the present embodiment, five oil palm materials W having a predetermined area and a predetermined thickness are stacked, compressed to a predetermined compression ratio, and fixed in the compression ratio state. The case will be described with reference to FIG.
In this cutting, the oil palm materials W1, W3, W5 having short sides in the supply direction of the continuous peeling plate UWD peeled off as shown in FIG. 2 (a) and the supply direction of the continuous peeling plate UWD shown in FIG. 2 (b) Long oil palm materials W2 and W4 are formed.
The five oil palm members W1,..., W5 having a predetermined area and a predetermined thickness may be formed by cutting, or may be formed by saw cutting. Any of the properties of oil palm may be used, but cutting is more efficient from the viewpoint of workability.

In the present embodiment, two oil palm members W1, W3, W5 with short sides in the supply direction of the continuous peeling plate UWD peeled off and two oil palm members W2, W4 with long sides in the supply direction of the continuous peeling plate UWD are provided. Although it forms with the kind of rotary race, you may set so that five oil palm material W1, ..., W5 may be obtained with the width | variety of the supply direction of the continuous peeling board UWD. In any case, as shown in FIG. 3, oil palm materials W1, W3, W5 with short sides in the supply direction of the continuous peeling plate UWD and oil palm materials W2, W4 with long sides in the supply direction of the continuous peeling plate UWD are provided. What is necessary is just to load so that the length direction of a mutual fiber may become a right angle.
Of course, the oil palm materials W1, W3, W5 with short sides in the supply direction of the continuous peeling plate UWD and the oil palm materials W2, W4 with long sides in the supply direction of the continuous peeling plate UWD shown in FIG. Are stacked such that the oil palm materials W1, W3, W5 with short sides in the supply direction of the continuous peeling plate UWD and the oil palm materials W2, W4 with long sides in the supply direction of the continuous peeling plate UWD are stacked. Can also be a combination of three.

Five oil palm materials W1,..., W5 having a predetermined area and a predetermined thickness are cut, and the humidity is adjusted until the multi-layer material NW before pressurization is aligned as shown in FIG. It is necessary to dry by applying low warm air to both sides of the oil palm materials W1,..., W5 having a predetermined area and thickness. Since the drying of the five oil palm materials W1,..., W5 proceeds until the multi-layer material NW before pressurization is sent to the production line in which the five oil palm materials W1,. In the dry state, as shown in FIG. 4 (a), the oil palm materials W1,..., W5 can be stacked as a pre-pressurized multilayer material NW simply stacked. When this lamination is performed, it is desirable to set the frame body 20 shown in FIG. 7 or the positioning holes 18 shown in FIG. 5 for positioning each side of the five oil palm members W1,.
Thus, the process of laminating a plurality of oil palm materials W dried in the drying process in a predetermined state is referred to herein as a laminating process.

Therefore, the laminated material NW before pressurization is consolidated by applying a predetermined compressive force under a predetermined temperature condition, and after a predetermined time has elapsed, the temperature is lowered to a predetermined temperature, and then the pressure is released. This is a laminated plywood PW.
That is, a pressing step of applying a compressive force in a direction perpendicular to the surface of the oil palm material W to the laminated oil palm material W heated by the heating step is performed, and the pressing step is performed at a predetermined temperature for a predetermined time. Thereafter, a laminated plywood PW is obtained through a fixing step of cooling to lower the temperature supplied in the heating step.

Here, the process of heating to raise the temperature of the laminated oil palm material W after the lamination process is referred to as a heating process, and the oil palm material W heated and laminated by the heating process is added to the oil palm material W. The process of applying a compressive force in the direction perpendicular to the surface of the material W is called a pressing process. Then, after pressing for a predetermined time in the pressing step, the step of lowering the temperature supplied in the heating step for cooling is called a fixing step in the sense of fixing the compacted compressibility state. .

Next, the compacted material manufacturing apparatus MC for manufacturing the laminated plywood PW of the present embodiment will be described.
In FIG. 5, the compacted material manufacturing apparatus MC for manufacturing the laminated plywood PW of the present embodiment mainly includes an internal space IS and positioning holes 18 by a structure divided into two parts, an upper press board 10A and a lower press board 10B. Are arranged on the peripheral portion 10a of the upper press plate 10A facing the peripheral portion 10b of the lower press plate 10B, and the lower press plate 10B is made of the multilayer material NW before pressurization. A positioning hole 18 that defines and regulates the position is formed, and the seal member 11 that seals the internal space IS and the positioning hole 18 within a predetermined vertical movement range of the upper press board 10A, and the inner side from the upper surface side of the upper press board 10A. A pipe 12 having a pipe port 12a that communicates with the space IS and supplies steam into the internal space IS and the positioning hole 18, a valve V4 on the upstream side thereof, and a lower press machine A pipe 13 having a pipe opening 13a for discharging water vapor from the internal space IS, and a pressure gauge P2 for detecting the vapor pressure in the pipe 13; The valve V5 on the downstream side, the drain pipe 14 connected to the valve V5, and the like.

Further, in the upper press board 10A and the lower press board 10B of the press board 10,

pipe lines

15 and 16 are formed for raising the temperature to a desired temperature by passing high-temperature steam. Pipes ST2 and ST3 branched from the steam supply side pipe ST1 and steam discharge side pipes ET1 and ET2 are connected to the

paths

15 and 16, respectively. Further, in the middle of the steam supply side pipes ST1, ST2, ST3, valves V1, V2, V3 and a pressure gauge P1 for detecting the steam pressure in the pipe ST1 are arranged, and the steam discharge side pipes ET1, ET2 Is connected to the drain pipe 14 via a valve V6.

In addition, the boiler apparatus which supplies water vapor | steam to piping ST1, and the press raising / lowering apparatus containing the hydraulic mechanism for raising / lowering and pressurizing the upper press board 10A with respect to the lower press board 10B of the fixed side of the press board 10 are abbreviate | omitted. Has been.
In the first embodiment, the internal space IS formed by the upper press board 10A and the lower press board 10B of the press board 10 and the piping 12 connected to the valve V4 for heating the inside of the positioning hole 18 are used. Although water vapor is introduced, high frequency heating, microwave heating, or the like can also be used. In particular, for the high-frequency heating of wood, a method of heating from the center of wood at a high frequency slightly lower than that of microwave is preferable to dielectric overheating by microwave.

Further, the press board 10 has a cooling water supply side for cooling to a desired temperature by passing low-temperature cooling water in place of water vapor through the

pipes

15 and 16 formed in the upper press board 10A and the lower press board 10B. Pipes ST12 and ST13 branched from the pipe ST11 are connected to the pipes ST2 and ST3, respectively. Further, valves V11, V12, V13 are arranged in the middle of the pipes ST11, ST12, ST13 on the cooling water supply side. In addition, the cooling water supply apparatus which supplies cooling water to piping ST11 is abbreviate | omitted.
Of course, when the present invention is carried out, the direction compressed by the press 10 is a direction perpendicular to the surfaces of the five oil palm materials W1,..., W5 of the multilayer material NW before pressurization. Compressive force is applied to

When the laminated plywood PW is manufactured from the pre-pressing multilayer material NW by the compacted material manufacturing apparatus MC configured as described above, first, as shown in FIG. 6A, a press in the compacted material manufacturing apparatus MC The upper press board 10A is raised with respect to the lower press board 10B on the fixed side of the board 10, and a pre-pressing multilayer material NW that has been dried in advance to a predetermined condition is formed by the upper press board 10A and the lower press board 10B. It is placed in the internal space IS and the positioning hole 18.
Here, in the present embodiment, the pre-pressing multilayer material NW that is a raw material of the laminated plywood PW is formed to have a predetermined dimension (thickness, width, length), and five oil palm materials. The surface side of W1,..., W5 was placed in the positioning hole 18 of the lower press board 10B with the upper press board 10A and the lower press board 10B facing the press board 10.

Subsequently, as shown in FIG. 6B, the upper press platen 10A is lowered at a predetermined pressure with respect to the pre-pressing multilayer material NW placed on the positioning hole 18 of the fixed-side lower press platen 10B. In this embodiment, the upper surface of the pre-pressurized multilayer material NW, that is, the surfaces of the oil palm materials W1,. Then, water vapor of a predetermined temperature (for example, 110 to 180 [° C.]) is passed through the pipe line 15 of the upper press board 10A and the pipe line 16 of the lower press board 10B, and the interior space IS and the positioning hole 18 have a predetermined temperature ( For example, it is maintained at 110 to 180 [° C.].

Next, the compression force of the upper press board 10A is set to a predetermined pressure (for example, 20 to 50 kg / cm ² ) with respect to the lower press board 10B on the fixed side, and the multilayer material NW before pressurization is applied to the upper press board 10A and the lower press board 10B. It is heated and compressed on the press panel 10B for a predetermined time (for example, 5 to 40 [min]). In order to prevent cracking, the compressive force at this time is gradually increased in accordance with the temperature rise of the pre-pressing multilayer material NW, that is, the temperature transmission state inside the pre-pressing multilayer material NW. Desirably, the heat compression time is also preferably set in consideration of the transmission time.

Furthermore, as shown in FIG. 6 (c), when the peripheral edge portion 10a of the upper press board 10A comes into contact with the peripheral edge part 10b of the lower press board 10B, the seal member 11 disposed on the peripheral edge part 10a of the upper press board 10A. The internal space IS and the positioning hole 18 formed by the upper press board 10A and the lower press board 10B are hermetically sealed. The temperature is raised to a predetermined temperature (for example, 150 to 210 ° C.) while the compression force by the upper press board 10A and the lower press board 10B is maintained in the sealed state of the internal space IS and the positioning hole 18.

In the present embodiment, the internal space IS and the internal space IS when the internal space IS and the positioning hole 18 formed by the upper press board 10A and the lower press board 10B are sealed via the seal member 11 The dimension interval in the vertical direction of the positioning holes 18 is set to the finished dimension (compression ratio) in the thickness direction when the multi-layer material NW before pressurization becomes a laminated plywood PW having an air-dry specific gravity of 0.7 or more by the press board 10. Yes. For this reason, the compression ratio of the entire thickness of the multilayer material NW before pressurization, that is, the change in the plate thickness due to the compression of the multilayer material NW before pressurization, is that the peripheral portion 10a of the upper press panel 10A is It will be decided by contacting.

Then, in the sealed state of the internal space IS and the positioning hole 18 shown in FIG. 6C, the compressive force of the upper press board 10A and the lower press board 10B is maintained, and the internal space IS and the positioning hole 18 are kept at a predetermined temperature ( For example, a heat treatment is performed to form a laminated plywood PW that is held for a predetermined time (for example, 30 to 120 minutes) with the temperature kept at 150 to 210.degree. At this time, high-temperature and high-pressure vapor pressure is generated between the surrounding surface of the pre-pressurized multilayer material NW and the inside thereof through the internal space IS and the positioning hole 18 which are sealed by the upper press board 10A and the lower press board 10B. You can go in and out.
As described above, in the present embodiment, the upper press board 10A and the lower press board 10B are in surface contact with the front and back surfaces of the pre-pressurized multilayer material NW and are held in the sealed internal space IS and the positioning holes 18. Therefore, the multilayer material NW before pressurization is sufficiently heated in its entire thickness, and is efficiently compressed and deformed.

Next, as shown in FIG. 6D, when the heat compression process is performed in a sealed state of the internal space IS and the positioning hole 18, the internal space IS and the positioning hole are detected by the pressure gauge P2 as a vapor pressure control process. 18 vapor pressure is detected, and the valve V5 is appropriately opened and closed. Thereby, high-temperature and high-pressure water vapor is discharged from the internal space IS and the positioning hole 18 to the drain pipe 14 side through the pipe port 13a and the pipe 13, and in particular, the moisture content of the outer layer portion of the multilayer material NW before pressurization. Therefore, the excess internal space IS and moisture in the positioning hole 18 are removed, and the internal space IS and the positioning hole 18 are adjusted to have a predetermined vapor pressure. Further, if necessary, a predetermined vapor pressure can be supplied to the internal space IS through the pipe 12 and the pipe port 12a (FIG. 5) connected to the valve V4. As a result, the fixing of the heat compression treatment of the wood, that is, the so-called immobilization of the wood is further promoted.

Furthermore, the valve V5 is opened as a vapor pressure control process immediately before shifting from the heating compression to the cooling compression by the upper press panel 10A and the lower press panel 10B, so that the internal space passes through the piping port 13a and the piping 13. High-temperature and high-pressure steam is discharged from the IS and positioning hole 18 to the drain pipe 14 side.

Subsequently, as shown in FIG. 6 (e), normal temperature cooling water is passed through the piping path 15 of the upper press panel 10A and the piping path 16 of the lower press panel 10B, whereby the upper press panel 10A and the lower press panel. 10B is cooled to around room temperature and held for a predetermined time (for example, 10 to 120 minutes) that varies depending on the material. At this time, the compression force of the upper press disk 10A with respect to the lower press disk 10B on the fixed side is maintained at a predetermined pressure (for example, 20 to 50 kg / cm ² ) that is the same as the pressure at the time of heat compression. The board 10A and the lower press board 10B are cooled.
Finally, as shown in FIG. 6 (f), the upper press platen 10A is raised relative to the fixed-side lower press platen 10B, and the finished laminated plywood PW is taken out from the internal space IS and the positioning hole 18. This completes a series of processing steps.

The compacted material manufacturing apparatus MC that manufactures the laminated plywood PW of the present embodiment mainly forms an internal space IS and a positioning hole 18 by a two-divided structure of an upper press board 10A and a lower press board 10B. Although the board 10 is provided, the movement restriction of the outer periphery of the pre-pressurized multilayer material NW when the present invention is carried out can be the frame body 20. The frame body 20 that regulates the movement of the outer periphery of the pre-pressurized multilayer material NW needs to have a vertically movable structure or a fixed structure depending on the dimensions of the upper press panel 10A.

The frame 20 shown in FIG. 7 has a structure in which the movable frame 23 can move up and down, and is arranged as the lower press panel 10B of FIGS.
An outer lower press disk 10Ba and an inner lower press disk 10Bb having the same height are disposed on the base plate 25 of the lower press disk 10B, and a frame groove 21 is formed therebetween. A plurality of coil springs 22 are disposed on the base plate 25 side of the frame body groove 21, and a square movable frame 23 is disposed above the coil springs 22. A cutout is formed on the inner surface of the movable frame 23 to form a fluid path 24 that guides fluid such as water vapor from the side surface of the pre-pressurized multilayer material NW. The inner periphery of the square movable frame 23 is substantially equal to the outer periphery of the pre-pressing multilayer material NW. When the pre-pressing multilayer material NW enters the square movable frame 23, each oil palm material W1,. There is no misalignment. Therefore, when the upper press board 10A is lowered, even if it has a width larger than the size of the lower press board 10B, when the upper press board 10A comes into contact with the movable frame 23, the movable frame 23 becomes elastic to the plurality of coil springs 22. It descends against it and responds to the compression of the multilayer material NW before pressurization. Then, the compression of the pre-pressurized multilayer material NW is completed at the movement limit of the plurality of coil springs 22. Of course, when the upper press board 10A is inserted into the movable frame 23 of the lower press board 10B, the movable frame 23 can be fixedly arranged on the lower press board 10B.

In this way, the thickness of the oil palm materials W1,..., W5 is heated and compressed by the external force applied in the direction perpendicular to the length direction of the fibers of the oil palm materials W1,. A laminated plywood PW that is processed and has an air-dry specific gravity of 0.7 or more is manufactured.
In this embodiment, after the vapor pressure is controlled, the pressure is gradually released to release the internal vapor pressure, and the water vapor pressure in the pre-pressurized multilayer material NW is lowered and fixed by cooling. When the compression is released, a laminated plywood PW having no surface deformation called bulging deformation or puncture can be formed. That is, the laminated plywood PW manufactured in the present embodiment does not cause bulging deformation or surface cracking after being released from compression, and ensures stable quality. In this embodiment, the upper press board 10A and the lower press board 10B are compressed and fixed to obtain the laminated plywood PW. However, when the present invention is carried out, a microwave used by a normal microwave oven is used. The laminated plywood PW can be obtained even if the multilayer material NW before pressurization is heated and compressed by dielectric heating at a high frequency slightly lower than the wave frequency band, and is fixed.

The five oil palm materials W1,..., W5 in the present embodiment have a thickness of 1.5 mm, 2.0 mm, 2.5 mm, 3.0 mm, 3.5 mm, 4.0 mm, 4.5 mm. , 5.0 mm, 5.5 mm, and 6.0 mm before pressurization in which five oil palm materials W1,. The laminated plywood PW was manufactured by compressing from the multilayer material NW.

A laminated plywood PW having been subjected to consolidation of 3 to 10 mm with respect to a thickness of 7.5 to 30 mm of the multilayer material NW before compression before compression was obtained. The temperature of the supplied steam is raised to 110 to 210 ° C., and the compression force applied during that time is 20 to 50 kg / cm ² . Here, by laminating five 1.5 mm oil palm materials W, a 7.5 mm pre-pressurized multilayer material NW is obtained. Here, when compressed at a predetermined compression rate at the laboratory level, Although it is 10% or less due to compression error and expansion after decompression, an error is present.

Also, just in case, the five oil palm materials W1,..., W5 in the present embodiment have thicknesses of 1.5 mm, 2.0 mm, 2.5 mm, 3.0 mm, 3.5 mm, 4 Five oil palm materials W1,..., W5 of the same thickness are used so that the fiber lengths are parallel to those of 0.0 mm, 4.5 mm, 5.0 mm, 5.5 mm, 6.0 mm. The laminated plywood PW was manufactured by compressing the arranged pre-pressing multilayer material NW.
Similar to the former, a laminated plywood PW was obtained which was subjected to consolidation processing of 3 to 10 mm with respect to the thickness of 7.5 to 30 mm of the multilayer material NW before compression basically before compression. The temperature of the supplied water vapor is increased from 110 ° C. to 210 ° C., and the compression force applied during that time is 20 to 50 kg / cm ² .

In Table 1, a multilayer material NW before pressurization in which five oil palm materials W1,..., W5 of the same thickness are arranged so that the fiber lengths intersect at right angles is indicated as “cross-bonded state”, and fibers The pre-pressing multilayer material NW having parallel lengths is shown as “parallel-bonded state”. Table 1 shows the results of the endurance test. Placed in a place where sunlight is used for three months from April to June, and 30 minutes of water at 10 and 4 o'clock on sunny days under natural weather conditions. Sprayed for a minute. In the “cross-bonded state” 1.5 mm and 2.0 mm laminated plywood PW, the surface was partially not flush, and there was a possibility that bubbles were generated and peeled inside. That is, it has been found that the usage environment conditions are restricted. In this test, the response to a sudden change in natural temperature was examined. Here, it is proved that the “parallel joined state” is easier to bond with each other than the “cross joined state”, and a good strength can be obtained. However, since the fiber direction is determined in a specific direction, the flatness as a plate is lacking, but conversely, the laminated plywood PW can be wound and conveyed, or used as a specific arc-shaped concrete frame or the like. .

However, in other samples, since hemicellulose has a function of binding lignin and cellulose, it is unclear how much they interfere with each other in the state of natural cultivation of oil palm trunk WD, By increasing the temperature to a predetermined temperature (140 ° C. or higher), for example, 80 ° C. or higher of the reaction start temperature of lignin, the reaction start temperature of hemicellulose is 60 ° C. or higher, reacting with each other, strengthening the bonding force, It turned out to be a material.
In the “cross-bonded” 1.5 mm and 2.0 mm laminated plywood PW, when fibers having a diameter of 0.4 to 1.2 mm cross, hemicellulose may bind lignin and cellulose at the crossing position. The total amount of absolute hemicellulose and lignin and cellulose obtained at a predetermined temperature and compressive force is small, and it is estimated that the joining is not completely performed.

Moreover, the inventors performed the test of Table 2 as severe use conditions. Although many samples were used, the samples submitted this time are extracted from the areas where remarkable features appear.
The laminated plywood A1 is composed of four oil palm materials W, and the thickness of the oil palm material W is 3.0 mm. The laminated plywood B1 is composed of four oil palm materials W, and the thickness of the oil palm material W is 2.5 mm + 3.0 mm + 3.0 mm + 2.5 mm. The laminated plywood C1 is made of three oil palm materials W, and the thickness of the oil palm material W is 2.5 mm + 3.0 mm + 2.5 mm. The laminated plywood D1 is composed of three oil palm materials W, and the thickness of the oil palm material W is 3.0 mm + 3.0 mm + 3.0 mm.
The compressibility of the multilayer material NW before pressurization and the laminated plywood PW was calculated by the formula (thickness of the multilayer material NW before pressurization−thickness of the laminate plywood PW) / thickness of the multilayer material NW before pressurization.

Here, a rigorous test was conducted in which it was applied to 30 ° C. hot water and 60 ° C. hot water. Even when the laminated plywood A1 and the laminated plywood B1 were immersed in hot water at 30 ° C., no change was observed within 90 minutes. However, when immersed in hot water at 60 ° C., the laminated surface softened in 45 minutes.
Moreover, in the laminated plywood C1, the laminated surface softened in 30 minutes even when it was immersed in hot water at 30 ° C. That is, this is not a problem of 60 ° C. or higher of the reaction start temperature of hemicellulose, but it can be estimated that the influence of compressive force is exerted. When the compressive force is increased, the air inside the laminated plywood C1 disappears and dense bonding is performed. However, if the compressive force is weak, only formal bonding is performed without crushing the fibers. It is estimated that the whole was softened. Naturally, even when immersed in hot water at 60 ° C., the laminated surface softened in 15 minutes.

The laminated plywood D1 is attached to 30 ° C. hot water for 45 minutes without any problem by increasing the thickness of the oil palm material W and increasing the compressive force, and even with 60 ° C. hot water for 15 minutes. I endure. Therefore, it is necessary to increase the compression force, and a compression rate of 65% or more is desirable in terms of the compression rate. In particular, a compression rate of 70% or more increases safety. When the compression rate is low, it is desirable to apply a water-repellent coating agent to the surface.

That is, as a test, when the compression ratio is 65% or more, the oil palm materials W1,..., W5 are arranged so that the fiber (vascular bundle K) lengths intersect each other at right angles. The thickness of the oil palm material W is 2.5 mm and is preferably 2.5 mm or more because the thickness is 2.5 mm.
In particular, there are no conditions in which the laminated plywood PW is immersed in hot water at 30 ° C. in nature. However, if the thickness of the oil palm material W is 2.5 mm and the compression rate is 65% or more, it can be used. Show.
In addition, the condition that the laminated plywood PW is immersed in hot water at 60 ° C. is to confirm the possibility that hemicellulose inhibits the binding between lignin and cellulose. If the compression ratio is 65% or more, It also indicates that it is difficult to appear.
However, since it means that the boundary line of the compressibility is about 65%, in mass production, it is desirably 65% or more, and the thickness of the oil palm material W is also 3.0 mm or more. Is desirable.

[Embodiment 2]
In Embodiment 1 described above, the oil palm material W is used that is a thin plate that is peeled to a predetermined thickness by applying the blade CT with a rotary race while rotating the oil palm trunk WD having a predetermined length in the circumferential direction. However, the fibers of the oil palm trunk WD can also be positively arranged on the design surface side.
FIG. 8 illustrates a lumber plate Z obtained by cutting a predetermined width, thickness and length shown in FIG. 8A from an oil palm trunk WD having a predetermined length.
Even if the oil palm trunk WD is cut to obtain a grid and a grain like the lumber lumber, there is no annual ring as shown in FIG. 8 (c), and the oil palm trunk WD as shown in FIG. 8 (b). Since only vascular bundles are formed in the length direction, a plate-like lumber plate Z (Z1,... Z5) is obtained as shown in FIG. . Since this kind of lumber board Z is used for an exposed surface as a design surface, it is usually formed to a thickness of 3 mm or more before consolidation. Here, it is desirable to compress at a compression rate of 65% or more, but since there is no disturbance in the fiber direction, if the compression rate is 60% or more, bonding is performed satisfactorily.

The lumber plate Z1 and the lumber plate Z2 formed in this way can also join the adjacent lumber plates Z1 and lumber plates Z2 as shown in FIG.
In FIG. 9, the lumber plate Z is formed from an inclined portion M2 in which the ends of the lumber plate Z1 and the lumber plate Z2 are inclined, and a stepped portion M1 and a stepped portion M3 of about several mm formed at the end positions. Has been. Here, when a compressive force in the vertical direction is applied to the surfaces of the lumber plate Z1 and the lumber plate Z2, the inclined portions M2 and the stepped portions M1 and M3 are joined to form one sheet. In particular, the color of the oil palm trunk WD is slightly different depending on the dry state, the heating temperature, etc., but a single plate in which the connection portion cannot be seen is formed only by aligning the growth years and the heating temperature.

At this time, pressure may be applied integrally in a state where it is placed on the upper surface of the multilayer material NW before pressurization, and it may be integrally formed as a laminated plywood PW, or in the case of being integrally connected as shown in FIG. Since it is in a certain direction, it can be wound and carried to join a specific surface.
FIG. 10 shows another example. FIG. 10 (a) shows a case where an oil palm lumber ZU is joined instead of the oil palm material W1 on the upper surface of one side of the laminated plywood PW, and FIG. 10 (b) shows a laminated plywood PW. The oil palm material W1 on both sides of the oil palm is joined in place of the oil palm material plate ZD at the positions of the oil palm material plate ZU and the oil palm material W5. As a result, one of the oil palm lumber plate ZU and lumber plate ZD can be used with good design, and the other can be used with different physical properties such as mechanical strength.

As described above, the composition for joining the oil palm material W of the present embodiment applies the blade CT from the outer periphery with a rotary race while rotating the oil palm trunk WD of a predetermined length in the circumferential direction, The oil palm material W is peeled to a thickness, the oil palm material W peeled at a predetermined thickness is dried, a predetermined number of layers are stacked, the temperature of the oil palm material W is increased, and the stacked oil palm is stacked. In the joining of the oil palm material W, which compresses the material W by applying a compressive force in a direction perpendicular to the surface of the oil palm material W, and joins the laminated plywood PW, the joining for joining the oil palm material W integrally is as follows: The surface of the oil palm material W peeled to a predetermined thickness is used as a joint surface having an adhesive function, and the plurality of oil palm materials W are controlled by controlling the temperature and compressive force of the plurality of oil palm materials W. Resin component and cellulose lignin containing the over arm itself, in which the saccharide component of the hemicellulose and the like.

Therefore, since the oil palm trunk WD has no nodes and no annual rings, when the oil palm material W is created by peeling off from the outer periphery with a rotary race to a predetermined thickness, a homogeneous oil palm material W without nodes is obtained. The laminated plywood PW made of the oil palm material W is homogeneous without nodes. Moreover, since the joining force is changed by the resin component and sugar component contained in the oil palm itself depending on the applied temperature and pressure, an arbitrary adhesive force can be obtained by controlling the applied temperature and pressure. Since a plurality of oil palm materials W are joined by a resin component and a sugar component contained in the oil palm itself to form a laminated plywood PW, other synthetic resins and synthetic rubbers are used as adhesives. Because there is no, it can be returned to nature and does not cause pollution problems.

Furthermore, the oil palm material W has almost no voids due to the compressive force when joined by the action of a resin component such as lignin contained in the oil palm itself and sugars such as cellulose and hemicellulose. In addition, it is waterproof and insect-proof and has a long service life even when used as a building material.
In particular, hemicellulose has a function of binding lignin and cellulose, and it is unclear how much they interfere with each other when the oil palm trunk WD is naturally cultivated. However, it was confirmed that by raising the temperature to a predetermined temperature, for example, 80 ° C. or higher of the reaction start temperature of lignin, the reaction start temperature of hemicellulose was 60 ° C. or higher, and they reacted with each other to become firm characteristics.

The oil palm compact material of the present embodiment includes an oil palm material W that is peeled off from the outer periphery to a predetermined thickness by a rotary race while rotating a predetermined length of the oil palm stem WD in the circumferential direction, and an oil palm stem WD of a predetermined length. In the lumber board Z obtained by cutting off a predetermined width, thickness and length in the same manner as wood, the lumber board from which the oil palm trunk WD is peeled and / or the oil palm trunk WD is lumbered. A plurality of Z pieces are joined by a resin component and a sugar component contained in the oil palm itself.
Therefore, the surface of the oil palm material W peeled to a predetermined thickness is used as a joint surface having an adhesive function, and a plurality of sheets are controlled by controlling the temperature and compressive force of the peeling plate and / or the lumber plate Z from which the oil palm material W is peeled. The oil palm material W is joined with a resin component such as lignin obtained by compacting the oil palm material W to a thickness of about 1 mm by a compacting process contained in the oil palm itself, and a saccharide component such as cellulose and hemicellulose.

Since the oil palm trunk WD has no nodes and no annual rings, when the oil palm material W is created by peeling off from the outer periphery to a predetermined thickness by a rotary race, a predetermined width, thickness, and length are taken from the predetermined length of the oil palm trunk WD. When producing the lumbered board Z (Z1,... Z5), the oil palm material W and the lumbered board Z (Z1,. As a result, the laminated plywood PW composed of a plurality of peeling plates and / or lumbering plates Z from which the oil palm material W has been peeled is homogeneous without nodes. Moreover, since the joining force is changed by the resin component and sugar component contained in the oil palm itself depending on the applied temperature and compressive force, an arbitrary adhesive force can be obtained by controlling the applied temperature and compressive force. Since the plurality of oil palm materials W are joined by a resin component and a sugar component contained in the oil palm itself to form a laminated plywood PW, other synthetic resins and synthetic rubbers are used as adhesives. Because it does not cause pollution problems that can be returned to nature. Furthermore, the compression force when joined by the resin component and sugar component contained in the oil palm itself eliminates the voids in the release plate, resulting in a dense structure, so that it has water resistance and is waterproof and insect-proof. It has a long service life even when used as a building material.

Further, when a wide flat plate is formed, the peeling plate and / or the lumber plate Z from which the oil palm material W has been peeled are connected laterally, that is, by connecting them in the width direction perpendicular to the length of the oil palm trunk WD. A board is obtained.
Then, the temperature of the oil palm material W is raised, and compression is performed by applying a compressive force in a direction perpendicular to the surface of the peeling plate and / or the lumber plate Z from which the oil palm material W has been peeled off, so that it is integrated with the laminated plywood PW The temperature rise of the oil palm material W at the time of joining may be either steam heating or hot plate heating, and both may be used simultaneously, and the compression pressure is applied to the joint surface of the oil palm trunk itself. Since it is only necessary to be able to derive resin components such as lignin and saccharides such as cellulose and hemicellulose, the degree of freedom of production is high.

Further, the oil palm compacted material of the present embodiment is a peeling plate and / or lumber plate Z from which the oil palm material W has been peeled, with a compressive force of 1 to 100 kg / cm ² or more in an environment at a temperature of 120 ° C. or higher. Since the peeled plate from which the oil palm material W has been peeled off and the thickness after the consolidation of the lumber plate Z are bonded to 1 mm or more, the temperature of the peeled plate from which the oil palm material W has been peeled off and / or the lumber plate Z By controlling the compressive force, a plurality of peeled release plates and / or lumber plates Z as oil palm materials W are joined and laminated by the action of resin components such as lignin contained in oil palm itself and sugars such as cellulose and hemicellulose. Means plywood. In particular, hemicellulose has a function of binding lignin and cellulose and can be firmly joined. In addition, since the peeled release plate as the oil palm material W and the thickness after consolidation of the lumber plate Z are 1 mm or more, the peeled release plate and / or the lumber plate Z as the oil palm material W are joined. Even if the oil palm fiber is as thick as 0.4 to 1.2 mm in diameter and strong, the resin palm such as lignin and the cellulose, hemicellulose Since saccharides are supplied, voids are not formed, and a long-life oil palm compact is obtained.

The oil palm compact material of the present embodiment is a peeling plate in which the oil palm material W is peeled off by rotating the oil palm trunk WD in a predetermined thickness with a cutter CT from the outer periphery while rotating the oil palm trunk WD in the circumferential direction. The oil palm material W that is formed and peeled off with the predetermined thickness is dried, and a predetermined number of layers are laminated, the temperature of the oil palm material W is increased, and the laminated oil palm material W is In the joining composition of the oil palm material W that is compressed by applying a compressive force in a direction perpendicular to the surface and joined as the laminated plywood PW, the oil palm material W is integrally joined by a plurality of oil palm materials W. The plurality of oil palm materials W are made into a resin component and a sugar component contained in the oil palm itself by controlling the temperature and the compression force.

Therefore, since the oil palm trunk WD has no nodes and no annual rings, when the oil palm material W is created by peeling off from the outer periphery with a rotary race to a predetermined thickness, a homogeneous oil palm material W without nodes is obtained. The laminated plywood PW made of the oil palm material W is homogeneous without nodes. Moreover, since the joining force is changed by the resin component such as lignin contained in the oil palm itself and the saccharide component such as cellulose and hemicellulose depending on the temperature and pressure to be added, any adhesive force can be obtained by controlling the temperature and pressure to be applied. Since a plurality of oil palm materials W are joined by a resin component such as lignin contained in the oil palm itself and a saccharide component such as cellulose and hemicellulose to form a laminated plywood PW, other synthetic resins, synthetic Since rubber is not used as an adhesive, it can be returned to nature without causing pollution problems. Furthermore, the oil palm material W has almost no voids due to the compressive force when joined by the action of a resin component such as lignin contained in the oil palm itself and sugars such as cellulose and hemicellulose. In addition, it is waterproof and insect-proof and has a long service life even when used as a building material.

The laminated plywood PW formed by integrally joining the oil palm material W in the joining composition of the oil palm material W of the above-described embodiment is composed of the oil palm material W, which is a plurality of the laminated oil palm materials W, except for the oil palm material W. That is, for example, a lumber plate Z such as persimmon, cedar, rice bran, persimmon leaf, rice cedar, karamatsu, red pine, chestnut, persimmon, persimmon, persimmon, cherry blossom, persimmon, persimmon, etc., as shown in FIG. The lumber plate ZU can be joined with the bonding ability of the oil palm material W by being disposed on the exposed surface. Moreover, it can be set as the design which utilized the grain arrange | positioned in the exposed surface of those one sides. In addition, a laminated plywood PW formed by integrally joining the oil palm material W is rotated to a predetermined thickness from the outer periphery with a rotary race while rotating a wood other than the oil palm material W, for example, a lauan material trunk in the circumferential direction. It can be a release plate (corresponding to one layer of veneer plate) from which the oil palm material W is peeled off. Accordingly, only one surface of the laminated plywood PW can be made of thin wood or bamboo made of other materials. In particular, it is suitable for use as a decorative board.

The laminated plywood PW formed by integrally joining the oil palm material W in the oil palm joint composition of the above embodiment is composed of a plurality of laminated oil palm materials W at two end faces other than the oil palm material W. By arranging the lumber plate ZU on the exposed surface on one side as shown in FIG. 10 (b), the lumber plate ZU can be joined with the adhesive ability of the oil palm material W. The lumber board ZU disposed on the exposed surface on one side can be a design utilizing the grain. Further, the thin plate WD disposed on the opposite exposed surface can have characteristics utilizing the properties of wood such as moisture resistance, vibration resistance, and insect resistance. In addition, a laminated plywood PW formed by integrally joining the oil palm material W is rotated to a predetermined thickness from the outer periphery with a rotary race while rotating a wood other than the oil palm material W, for example, a lauan material trunk in the circumferential direction. The peeled plate (corresponding to one layer of the veneer plate) of the oil palm material W peeled off on the exposed surface side can be one sheet on the exposed surface side or two sheets on both exposed surface sides. Accordingly, only one surface of the laminated plywood PW can be made of thin wood or bamboo made of other materials. In particular, it is suitable for use as a decorative board.

The joining of the oil palm material W of the above-described embodiment is a process of forming the oil palm material W by peeling the oil palm trunk WD having a predetermined length from the outer periphery to the predetermined thickness with the blade CT while rotating the oil palm trunk WD in the circumferential direction. Can be a release plate process. Moreover, even if the drying process of the oil palm material W which dries the oil palm material W is the same process as the process formed in the oil palm material W, a separate process may be sufficient as this, and let this be a drying process. it can.
And the process of laminating the dried oil palm material W in a predetermined state as the multilayer material NW before pressurization is usually used by laminating in units of 2 to 5 sheets, but in principle Two or more layers may be stacked, and this can be a stacking step.

Further, in the step of heating to raise the temperature of the oil palm material W laminated after the laminating step, the step of introducing water vapor or electric heat and heating or heating with a hot plate is because the heating energy is supplied. can do. Furthermore, the step of applying a compressive force in a direction perpendicular to the surface of the oil palm material W to the laminated oil palm material W heated by the heating step is compression of the oil palm material W at a predetermined compression rate. That is, it is only necessary to compress the multilayer material NW before pressurization. This step can be a pressing step.
In addition, after pressing for a predetermined time in the pressing step, the temperature supplied in the heating step is lowered, the compression state of the laminated plywood PW is fixed, and the compression force compressed at a predetermined compression rate is released. This can be taken from the laminated plywood PW and used as a fixing step.

Thus, the joining method of the oil palm material W of the said embodiment is peeled off with the cutter CT from the outer periphery to a predetermined thickness with a rotary race while rotating the oil palm trunk WD of a predetermined length in the circumferential direction. A peeling plate step formed on the oil palm material W as a peeled peeling plate, a drying step for drying the oil palm material W, and a plurality of oil palm materials W dried in the drying step are laminated in a predetermined state. An oil palm material W is added to the laminating step, a heating step of heating to raise the temperature of the laminated oil palm material W after the laminating step, and the laminated oil palm material W heated by the heating step. A pressing step for applying a compressive force in a direction perpendicular to the surface of the substrate, and a fixing step for lowering the temperature supplied in the heating step after pressing for a predetermined time in the pressing step. Is shall.

Therefore, since the oil palm trunk WD used in these processes has no nodes and no annual rings, when the oil palm material W is created by peeling off from the outer periphery to a predetermined thickness with a rotary race, the uniform oil palm material W without nodes is formed. As a result, the laminated plywood PW made of the oil palm material W becomes homogeneous without nodes. In addition, the bonding force can be changed by the action of resin components such as lignin contained in the oil palm itself and sugars such as cellulose and hemicellulose, depending on the applied temperature and compressive force. Adhesive strength is obtained. Since the plurality of oil palm materials W are joined by the action of a resin component such as lignin contained in the oil palm itself and sugars such as cellulose and hemicellulose, the laminated plywood PW is formed. Because synthetic rubber is not used as an adhesive, it can be returned to nature without causing pollution problems. Furthermore, the oil palm material W has almost no voids due to the compressive force when joined by the action of a resin component such as lignin contained in the oil palm itself and sugars such as cellulose and hemicellulose. In addition, it is waterproof and insect-proof and has a long service life even when used as a building material.

Frame body 20 or positioning for positioning each side of five oil palm materials W1,. The hole 18 is a frame body 20 or a positioning hole 18 that regulates a predetermined loading surface, and regulates the top and bottom and the left and right of the surface of the plurality of oil palm members W. Therefore, the oil palm material W is prevented from extending in a direction perpendicular to the surface to which the compressive force is applied, and a thick portion and a thin portion are not generated depending on the position of the laminated plywood PW.

In the laminating step of laminating a plurality of oil palm materials W according to the above-described embodiment in a predetermined state, one of the plurality of laminated oil palm materials W is used as a lumber plate Z other than oil palm, and the oil palm material W is peeled The laminated board PW is integrally joined to the laminated plywood PW including the lumber plate Z other than the peeling plate. Thus, the laminated plywood PW formed by integrally joining the oil palm material W in the joining composition of the oil palm material W is an oil palm made of a release plate obtained by peeling one of the plurality of laminated oil palm materials W. By arranging the lumber lumber plate ZU other than the lumber W on the exposed surface on one side as shown in FIG. 10 (a), the lumber plate ZU can be joined with the adhesive ability of the oil palm material W. it can. Moreover, it can be set as the design which utilized the grain arrange | positioned in the exposed surface of those one sides. Accordingly, only one surface of the laminated plywood PW can be made of thin wood or bamboo made of other materials. In particular, it is suitable for use as a decorative board.

In the laminating step of laminating a plurality of oil palm materials W according to the above-described embodiment in a predetermined state, a thin plate other than the exfoliating plates exfoliating two end surfaces of the exfoliating plates of the laminated oil palm materials W. And the lumber plate Z other than the peeling plate from which the oil palm material W is peeled off, and is integrally joined to the laminated plywood PW. In the laminated plywood PW of this embodiment, a lumber plate ZU having a lumber plate Z other than the release plate from which the oil palm material W is peeled off is used as a lumber plate ZU, as shown in FIG. ), The lumber plate ZU can be joined with the bonding ability of the oil palm material W by being disposed on the exposed surface on one side. The lumber board ZU disposed on the exposed surface on one side can be a design utilizing the grain. In addition, the lumber plate ZD disposed on the opposite exposed surface can have characteristics utilizing the properties of wood such as moisture resistance, vibration resistance, and insect resistance. Accordingly, only one surface of the laminated plywood PW can be made of thin wood or bamboo made of other materials. In particular, it is suitable for use as a decorative board.

In the laminating step of laminating a plurality of oil palm materials W1,..., W5 of the above embodiment in a predetermined state, one of the surfaces of one side of the oil palm materials W1,. The two sheets of the sheet or both end faces are made of a lumber plate ZU and / or a lumber plate ZV made of wood other than the oil palm material W1 or the oil palm material W5, including thin plates other than the oil palm materials W1,. The laminated plywood PW is integrally joined. Here, the oil palm material W can be one or more.
Of course, the lumber plate ZU and / or the lumber plate ZD made of wood other than the oil palm materials W1,. Further, as with the plywood, the oil palm material W peeled off from the outer periphery to a predetermined thickness by a rotary race while rotating the trunk of the lauan material of a predetermined length in the circumferential direction is made of wood other than the oil palm material W, for example, firewood, The lumber plate ZU and / or the lumber plate ZD can be made of cedar, rice bran, bamboo leaf, rice cedar, pine pine, red pine, chestnut, cocoon, cocoon, cocoon, cherry blossom, cocoon, cocoon and the like.
Note that the joining here includes mechanical joining utilizing the forming ability because the release plate of the oil palm trunk has the ability to be formed into an uneven surface opposite to the uneven surface.

The consolidation process described in the present embodiment refers to compressing oil palm material W or the like by applying a predetermined compression force under a predetermined temperature condition, and lowering the temperature to a predetermined temperature after a predetermined time has elapsed. It is the process which compresses a base material with a predetermined | prescribed compression rate by the fixation which makes it pressure-release.
At this time, as shown in FIG. 11A, the vascular bundle K of the oil palm trunk WD is substantially circular, and the average diameter of the vascular bundle K calculated by (maximum length + minimum length) / 2 (arithmetic mean = The arithmetic average) has a thickness of 0.4 to 1.2 mm, and a conduit L is also formed therein. The thickness of the vascular bundle K varies greatly depending on the position of the oil palm trunk WD. As shown in FIG. 11 (d), the thickness of the vascular bundle K is generally narrow on the outer skin side (FIG. 11 (a)), and on the central side (FIG. 11 (d)). ) Is thicker. In addition, from the position of the cut surface of the oil palm trunk WD, the cross section of the vascular bundle K on the outer peripheral side is thin and gradually becomes thicker toward the center.
When the vascular bundle K of the oil palm material W is destroyed, it becomes a surface that has been crushed (the thorns are easily pierced), and the surface is not different from a surface that is not compacted. In particular, the destruction of the vascular bundle K is more difficult than usual because it is harder than usual. Therefore, there is a change in the parenchyma J as shown in FIG. 12 (b) in a state where the hard ridge does not stand up, and since it is usually compressed only in one direction (vertical direction), the plate thickness after consolidation processing Is specified as 1 mm or more. As a result, the vascular bundle K is not destroyed by the destruction of the vascular bundle K.

In consolidation, the elongation in the direction perpendicular to the direction of compressive force is restricted. That is, a compressive force is applied to the oil palm material W from a specific direction. The oil palm material W softens and flows in the vertical direction with respect to the compression force applied. When the elongation in the direction perpendicular to the direction of the compressive force is not restricted, the entire oil palm material W flows out from the position where the compressive force is received and gathers in a place where the compressive force is not applied. Therefore, the expansion in the direction perpendicular to the direction of the compressive force is restricted so that the softened oil palm member W does not flow out even if a compressive force is applied to the outer periphery of the oil palm member W.

The circumference of the vascular bundle K is hard with silica crystals attached, and even if the conduit L is deformed by consolidation, it is only deformed by about 1/10 to 2/10 with a thickness of 0.4 to 1.2 mm. In the consolidation process, the parenchyma J excluding the vascular bundle K is deformed and changes. However, even if compression is performed so that an external force is directly applied to the vascular bundle K, the mechanical strength does not change or, conversely, the oil palm material W produced from the oil palm trunk WD has a compacted thickness. The thickness is desirably 1 mm or more.

When the vascular bundle K of the oil palm trunk WD is 1.2 mm in thickness, the vascular bundle K that has been consolidated is about 0.8 to 0.9 mm, and the presence of parenchymal cells J excluding the vascular bundle K is 0.1. Since the thickness is about 0.2 mm, the mechanical strength in the compacted state is increased.
However, when the vascular bundle K is compressed at a pressure at which it is broken, the mechanical strength does not change, or the mechanical strength decreases, so the thickness of the compacted oil palm material W needs to be at least 1.0 mm. Become. For example, when the thickness of the compacted oil palm material W is 0.8 mm or less, the 0.4 mm vascular bundle K is safe, but the vascular bundle K of 1.2 mm may be slightly reduced in diameter. It can be destroyed. Therefore, if the thickness of the compacted oil palm material W is 1.0 mm or more, it is natural that the vascular bundle K is somewhat reduced in diameter, so that it is not broken or cut.
Thus, the thickness of the oil palm material W which carried out the consolidation process shall be 1.0 mm or more.

As described above, the composition that contributes to the consolidation of the oil palm material W according to the present embodiment includes a resin component such as lignin and the like of the oil palm material W that is produced from the oil palm trunk WD having a predetermined length, and cellulose, hemicellulose, The saccharide component. In addition, although the inventors' analysis has recognized that the resin composition such as lignin and saccharide components such as cellulose and hemicellulose are the main compositions, there is a possibility that the involvement of other components cannot be denied if the analytical ability is improved. There is. Even if it is small, it cannot be denied that there may be other components that contribute to consolidation.

[Embodiment 3]
The laminated plywood PW formed by integrally joining the oil palm material W in the oil palm material joining composition of the first and second embodiments is a thin plate other than the oil palm. That is, for example, a thin plate material WU that makes use of the grain of a cypress, cedar, rice bran, bamboo shoot, rice cedar, pine pine, red pine, chestnut, cocoon, cocoon, cocoon, cherry tree, cocoon, cocoon, etc. is shown in FIG. As described above, the thin plate material WU can be joined with the adhesive ability of the oil palm material W by being disposed on the exposed surface on one side. Moreover, it can be set as the design which utilized the grain arrange | positioned in the exposed surface of those one sides. Accordingly, only one surface of the laminated plywood PW can be made of thin wood or bamboo made of other materials. In particular, it is suitable for use as a decorative board.

The laminated plywood PW formed by integrally joining the oil palm material W in the oil palm material joining composition of the present embodiment is a thin plate other than oil palm with two sheets on both end surfaces of the laminated oil palm material W. For example, a thin plate material WU that makes use of the grain of a cedar, cedar, rice bran, cocoon leaf, rice cedar, pine pine, red pine, chestnut, persimmon, persimmon, persimmon, cherry tree, persimmon, persimmon, etc., as shown in FIG. 13 (b) In addition, the thin plate material WU can be joined with the adhesive ability of the oil palm material W by being disposed on the exposed surface on one side. The thin plate material WU disposed on the exposed surface on one side can have a design utilizing the grain. In addition, the thin plate material WV disposed on the opposite exposed surface can have characteristics utilizing the properties of wood such as moisture resistance, vibration resistance, and insect resistance. Accordingly, only one surface of the laminated plywood PW can be made of thin wood or bamboo made of other materials. In particular, it is suitable for use as a decorative board.

The joining of the oil palm material W according to the present embodiment is a thin plate process in which a predetermined length of the oil palm trunk WD is rotated in the circumferential direction, and is formed into a thin plate by stripping with a blade CT from the outer periphery to a predetermined thickness with a rotary race. It can be. Moreover, even if the drying process of the oil palm material W which dries the oil palm material W may be the same process as the process formed in the oil palm material W, it may be a separate process, and this shall be a thin plate drying process. Can do.
And the process of laminating the dried oil palm material W in a predetermined state as the multilayer material NW before pressurization is usually used by laminating in units of 2 to 5 sheets, but in principle Two or more layers may be stacked, and this can be a stacking step.

As described above, the oil palm material joining method according to the present embodiment is a method in which a predetermined length of the oil palm trunk WD is rotated in the circumferential direction while the rotary CT is peeled from the outer periphery to the predetermined thickness with the blade CT, and a plurality of oils A thin plate process for forming the palm material W, a thin plate drying step for drying the oil palm material W, a lamination step for laminating a plurality of oil palm materials W dried in the thin plate drying step in a predetermined state, and the lamination A heating step for heating to raise the temperature of the laminated oil palm material W after the step, and a right angle with respect to the surface of the oil palm material W to the laminated oil palm material W heated by the heating step. A pressing step of applying a compressive force in the direction, and a fixing step of lowering the temperature supplied in the heating step after pressing for a predetermined time in the pressing step.

Therefore, since the oil palm trunk WD used in these processes has no nodes and no annual rings, when the oil palm material W is created by peeling off from the outer periphery with a rotary race to a predetermined thickness, the uniform oil palm material W without nodes is formed. As a result, the laminated plywood PW made of the oil palm material W, which is a thin plate, becomes homogeneous. In addition, the bonding force can be changed by the action of resin components such as lignin contained in the oil palm itself and sugars such as cellulose and hemicellulose, depending on the applied temperature and compressive force. Adhesive strength is obtained. And since the oil palm material W consisting of the plurality of thin plates is joined by the action of resin components such as lignin contained in the oil palm itself and sugars such as cellulose and hemicellulose, the laminated plywood PW is formed. Since synthetic resin and synthetic rubber are not used as adhesives, they can be returned to nature and cause no pollution problems. Furthermore, since the compressive force when joined by the action of a resin component such as lignin contained in the oil palm trunk WD itself and sugars such as cellulose and hemicellulose, the gaps in the thin plate W are almost eliminated, and a dense structure is formed. In addition, it is waterproof and insect-proof and has a long service life even when used as a building material.

The frame body 20 or the positioning hole 18 for positioning each side of the five thin plates W1,..., W5 in the laminating step of laminating the thin plates W dried in the thin plate drying step of the above embodiment in a predetermined state The frame 20 or the positioning hole 18 that regulates a predetermined stacking surface, and regulates the top and bottom and the left and right of the surface of the plurality of oil palm members W. Therefore, the oil palm material W is prevented from extending in a direction perpendicular to the surface to which the compressive force is applied, and a thick portion and a thin portion are not generated depending on the position of the laminated plywood PW.

In the laminating step of laminating a plurality of thin oil palm members W in a predetermined state according to the present embodiment, the oil palm material W1 of the plurality of laminated oil palm members W1,. A thin plate WU other than the material W and a thin plate WU other than the oil palm material W are integrally joined as a laminated plywood PW. Thus, the laminated plywood PW formed by integrally joining the oil palm materials W2,..., W6 in the joining composition of the oil palm materials W2,. Oil palm material W1, W6, and a single sheet of oil palm material W1 (W1) other than oil palm, for example, cocoon, cedar, rice bran, bamboo leaf, rice cedar, karamatsu, red pine, A thin plate material WU (W1) that makes use of the grain of chestnuts, straw, cocoons, sakura, cherry blossoms, cocoons, cocoons, etc. is arranged on one exposed surface as shown in FIG. WU (W1) can be joined with the adhesive ability of oil palm materials W2,..., W6. Moreover, it can be set as the design which utilized the grain arrange | positioned in the exposed surface of those one sides. Accordingly, only one surface of the laminated plywood PW can be made of thin wood or bamboo made of other materials. In particular, it is suitable for use as a decorative board.

In the laminating step of laminating a plurality of thin oil palm materials W1,..., W7 in a predetermined state according to the present embodiment, two of the two end surfaces of the oil palm materials W1, W7 laminated are oiled. A thin plate WU (W1) and a thin plate WV (W7) made of wood or the like other than palm are integrally joined as a laminated plywood PW including the thin plate WU (W1) and the thin plate WV (W7) other than oil palm. The laminated plywood PW of this embodiment is a thin plate WU (W1) other than the oil palm material W and a thin plate WV (W7), two of the two end surfaces of the oil palm materials W1,. That is, for example, a thin plate material WU (W1) utilizing wood grain such as persimmon, cedar, rice persimmon, persimmon leaf, rice cedar, Karamatsu, Akamatsu, chestnut, persimmon, persimmon, persimmon, cherry blossom, persimmon, persimmon is shown in FIG. As shown in b), the thin plate material WU (W1) and the thin plate WV (W7) can be joined with the adhesive ability of the oil palm materials W2,. . The thin plate material WU disposed on the exposed surface on one side can have a design utilizing the grain. In addition, the thin plate material WV disposed on the opposite exposed surface can have characteristics utilizing the properties of wood such as moisture resistance, vibration resistance, and insect resistance. Accordingly, only one surface of the laminated plywood PW can be made of thin wood or bamboo made of other materials. In particular, it is suitable for use as a decorative board.

In the laminating step of laminating a plurality of oil palm materials W1,..., W6 or oil palm materials W1,. One of the surfaces of the materials W1,..., W6 or the oil palm materials W1,..., W7 or two of the both end surfaces is made of oil palm materials W1,. The thin plate WU and / or the thin plate WV are integrally joined as a laminated plywood PW including thin plates other than the oil palm materials W1,..., W6 or the oil palm materials W1,. Here, the oil palm material W can be 1 or more.
Of course, the thin plate WU and / or the thin plate WV made of oil palm materials W1,..., W6 or wood other than oil palm may be used as the Lauan material. Similarly to the plywood, a thin lamina made of wood other than oil palm is peeled off from the outer circumference with a rotary race while rotating a lauan trunk of a predetermined length in the circumferential direction. can do.
In addition, since the oil palm material W has the capability to shape | mold on the uneven surface opposite to an uneven surface in the joining here, the mechanical joining using the shaping | molding capability is also included.

[Embodiment 4]
Next, the laminated plywood of the oil palm of this Embodiment and woods other than oil palm is demonstrated.
The process of FIG. 1 is not different from the oil palm trunk WD even in a predetermined length of Lauan or Sina or conifer tree trunk. A Lawan thin plate, a Chinese thin plate, or a coniferous thin plate formed by peeling a lawan, a Chinese or coniferous trunk in a circumferential direction while rotating it in the circumferential direction, is formed by a similar process.

That is, the oil palm material W having a predetermined area and a predetermined thickness is further cut as shown in FIGS. 14B and 14C, and four oil palm materials W2 having a predetermined area and a predetermined thickness are obtained. ,..., W5 (specially, when the number of oil palm materials W is not intended, simply written as oil palm material W) is cut.
Further, as shown in FIG. 14 (a), the center of the Lauan stem LD is rotated so as to be an axis, and a cutter CT having a predetermined width is applied to the outer peripheral side thereof, so that the continuous thin plate ULD is peeled off by the same peeling as the wig. Is formed. That is, the lauan stem LD is formed by cutting out a continuous thin plate, ie, a continuous thin plate ULD, with a predetermined thickness like radish wig peeling. The continuous thin plate ULD is cut to a predetermined length and dried to produce a Lauan thin plate L having a predetermined area and a predetermined thickness. In order to form the multilayer material NW before pressurization, the Lauan thin plate L is disposed at the corresponding position.

The Lawan thin plate L1 and the oil palm materials W2,..., W5 according to the present embodiment have the Lauan thin plate L disposed on the exposed surface. The exposed surface can be the Lauan thin plate L. On the contrary, the material of the layer not exposed, for example, one, two, or three of the oil palm materials W2, W3, and W4 may be the lauan thin plate L. In place of the lauan thin plate L, a Chinese thin plate or a coniferous thin plate can be used.
In particular, it is preferable to use the thin China plate for the design surface. In addition, for softwood thin plates, one to three sheets are bonded with other adhesives such as urea resin, epoxy resin, or non-formaldehyde adhesive, and the oil palm material W is bonded to both surfaces. Although the strength can be increased, the use of an oil palm powder obtained by pulverizing a portion not used as the oil palm material W as an adhesive is more environmentally friendly. Even when Lauan thin plate L, China thin plate, or coniferous thin plate is used, the fiber length direction is basically an array of thin plates perpendicular to each other, and the use is determined as a multilayer plywood PW for bending. The same fiber (vascular bundle) direction can be used, and one or two of the multilayer thin plates can have different fiber directions.

Next, in the present embodiment, as shown in FIG. 15, a total of five sheets of lauan thin plate L1 having a predetermined area and a predetermined thickness and four oil palm materials W2,. An example of the multilayer material NW before pressurization will be described. In addition, when implementing this invention, the number of the lauan thin board L1 and the oil palm material W is not limited.
As shown in FIG. 15, the multilayer material NW before pressurization is the same as the lauan thin plate L1 with a short side in the supply direction of the continuous thin plate ULD that has been peeled off the lauan stem LD described with reference to FIG. 14 (a). 14B, oil palm materials W3 and W5 having short sides in the supply direction of the continuous thin plate UWD from which the oil palm trunk WD has been peeled off, and the supply of the continuous thin plate UWD shown in FIG. 14C. The thin plates W2 and W4 having long sides in the direction are stacked.
The five lauan thin plates L1 and the oil palm materials W2,..., W5 having a predetermined area and a predetermined thickness may be formed by cutting, or may be formed by saw cutting. Any of the properties of oil palm may be used, but cutting is more efficient from the viewpoint of workability.

In the present embodiment, two types of oil palm materials W3 and W5 having short sides in the supply direction of the continuous thin plate UWD from which the oil palm trunk WD has been peeled and thin plates W2 and W4 having long sides in the supply direction of the continuous thin plate UWD are provided. However, it may be set so that four oil palm materials W2,..., W5 can be obtained with a width in the supply direction of the continuous thin plate UWD. In any case, as shown in FIG. 15, the lauan thin plate L1 and the oil palm materials W3 and W5 with short sides in the supply direction of the continuous thin plate UWD, and the oil palm materials W2 and W4 with long sides in the supply direction of the continuous thin plate UWD are provided. What is necessary is just to load the multilayer material NW before pressurization so that the length direction of each fiber becomes a right angle.
Of course, the lavan thin plate L1, the oil palm materials W3, W5 with short sides in the supply direction of the continuous thin plate UWD and the oil palm materials W2, W4 with long sides in the supply direction of the continuous thin plate UWD shown in FIG. Are stacked so as to be perpendicular to each other, two lauan thin plates L1 and two oil palm materials W3 and W5 in the supply direction of the continuous thin plate UWD, and two oil palm materials W2 and W4 in the long direction in the supply direction of the continuous thin plate UWD. Can also be a combination of three.

Five lauan thin plates L1 and oil palm materials W2,..., W5 having a predetermined area and a predetermined thickness are cut until they are aligned with the stacked state of the multilayer material NW before pressurization as shown in FIG. In this case, it is necessary to dry the hot air having a low humidity by applying it to both sides of the lauan thin plate L1 and the oil palm materials W2,. The lauan thin plate L1 and the oil palm material W2,..., W5 as the multilayer material NW before pressurization are sent to a production line where five sheets of lauan thin plate L1 and oil palm material W2,. , W5 progresses, so that, for example, as shown in FIG. 4A, they can be laminated as a pre-pressurized multilayer material NW. When this lamination is performed, in order to prevent the lauan thin plate L1 and the oil palm material W from spreading in the surface direction, a frame for positioning each side of the five lauan thin plates L1 and the oil palm materials W2,. It is desirable to set 20 (see FIG. 7) or positioning hole 18 (see FIG. 5). Thus, the process of laminating the lauan thin plate L and the oil palm material W dried in the drying process in a predetermined state is called a laminating process.

Here, the laminated plywood PW is compressed as a multilayer material NW before pressurization by applying a predetermined compression force under a predetermined temperature condition, and after a predetermined time has elapsed, the temperature is set to a predetermined level. The pressure was released after the temperature was lowered to the temperature of the sample and fixed.
That is, a compression step of applying a compressive force in a direction perpendicular to the surface of the lauan thin plate L and the oil palm material W to the laminated lauan thin plate L1 and the oil palm materials W2, ..., W5 heated by the heating step. After pressing for a predetermined time at a predetermined temperature in the compression step, the temperature supplied in the heating step is lowered, and through a fixing step for maintaining the compressed state, a consolidated laminated plywood PW is obtained. is there.
The step of heating to raise the temperature of the laminated lauan thin plate L and oil palm material W after the laminating step is called a heating step, and the lauan thin plate L and oil palm material laminated by being heated by the heating step. A process of applying a compressive force in a direction perpendicular to the surfaces of the Lauan thin plate L and the oil palm material W to W is called a compression process. Then, after pressing for a predetermined time in the compression step, the temperature supplied in the heating step is lowered, and the step of cooling and fixing at normal temperature or slightly lower than that is fixed in a consolidated state. This is called an immobilization process.

First, the procedure for manufacturing the laminated plywood according to the embodiment of the present invention will be described with reference to the flowchart of FIG. 16 using the compacted material manufacturing apparatus MC for manufacturing the laminated plywood PW shown in FIGS.
As shown in the flowchart of FIG. 16, first, the oil palm trunk WD having a predetermined length is rotated in the circumferential direction thereof, and is peeled to a predetermined thickness with the blade CT of the rotary race to form a plurality of oil palm members W. In the thin plate process of Step S10, the oil palm material W having a thickness within the range of 10 mm to 35 mm is peeled from the oil palm trunk WD, and then in the drying process of Step S20, the moisture content is within the range of 5% to 30%. The dried oil palm material W is obtained.

Similarly, as shown in FIG. 14 (a), a plurality of lauans are peeled off to a predetermined thickness with a rotary lace cutter CT while rotating a lauan stem LD made of a lauan stem having a predetermined length in the circumferential direction. In the thin plate process of step S11 for forming the thin plate L, the Lauan thin plate L having a material thickness in the range of 10 mm to 25 mm is peeled from the Lauan stem LD, and then the moisture content is 5% to 30% in the drying process of Step S21. The lauan thin plate L is dried within the range and dried.

Here, the drying method of the oil palm material W and the lauan thin plate L in the drying process includes artificial drying or natural drying (sun drying). As artificial drying, for example, oil palm material W is used to heat hot air using a dryer such as a steam dryer having a high-temperature steam as a heat source and a built-in dehumidifier including a refrigerator for removing humidity. Oil palm material W, external heating method that heats from the outside of the lauan thin plate L by spraying on the lauan thin plate L or heating and squeezing with a press board, dielectric oil is applied to the oil palm material W, the lauan thin plate L, and the inside However, as is well known, natural drying is generally less expensive than artificial drying, as is well known.

However, when the oil palm material W and the lauan thin plate L are naturally dried, especially when the oil palm material W is thick, bacteria such as mold are prone to grow and corrode, and productivity and commercial value are impaired. This is because wood such as Lauan thin plate L, which is generally used for building materials, forms a secondary xylem composed of cell (dead cell) tissue in which the movement of water and nutrients has stopped. Oil palm stem WD is composed only of primary tissue of vascular bundle K and parenchymal cell J, and most cells centering on parenchymal cell J are living cells in which water and nutrients are transferred, and the moisture content is extremely high. It is. Furthermore, it has been found that oil palm trunk WD (oil palm trunk) is rich in saccharides (eg, fructose, glucose, fructooligosaccharides, inositol, etc.). When the thickness of the oil palm material W obtained from the trunk of the palm is thick, bacteria such as mold are proliferated and corroded easily in natural drying, and productivity and commercial value are impaired.
Therefore, according to the experiments by the present inventors, by reducing the thickness of the oil palm material W obtained from the oil palm trunk WD to a range of 20 mm or less, the product value and productivity decrease due to bacteria such as mold even in natural drying. It has been confirmed that the cost can be reduced without incurring cost. Note that this thickness corresponds to a thickness of 3.5 mm to 7.0 mm after compaction when the compression ratio is 65%. If the compression ratio is 70%, the thickness corresponds to 3.0 mm to 6.0 mm after the consolidation.

Furthermore, according to the experiments by the present inventors, when the thickness of the oil palm material W obtained from the oil palm trunk WD is less than 3 mm (when it is less than 0.9 to 1.1 after the consolidation process), the thickness Since it is thin, it is easy to cut when it is peeled off, and when the thickness exceeds 20 mm, it is difficult to dry uniformly to the inside, so deformation and bulge are likely to occur after compaction processing, which will be described later, and the curved surface is replaced with a straight line It has also been confirmed that cracks and the like are likely to occur.
For this reason, the oil palm material W having a thickness of 3 mm or more and 20 mm or less is peeled off from the oil palm trunk WD and can be dried at low cost without causing deterioration of the product value or productivity due to bacteria such as mold even by natural drying. Further, the cutting operation is easy, and the dimensional shape stability after the compacting process described later is high.
Preferably, the thickness of the oil palm material W from the oil palm trunk WD is in the range of 6 mm or more and 15 mm or less. This thickness corresponds to a thickness of 2.1 mm or more and 5.3 mm or less after the compacting when the compression ratio is 65%. If the compression rate is 70%, the thickness corresponds to 1.8 mm to 4.5 mm after the consolidation.

In addition, when the moisture content of the dried oil palm material W and the lauan thin plate L is less than 5% as a result of repeated experiments by the present inventors, A phenomenon in which a sufficient chemical change cannot be caused by the compacting process described later, and the surface is too dry, and when it is wetted with water after consolidation, the compressed part returns to the original thickness shape, so-called Improper immobilization tends to occur. On the other hand, when the moisture content exceeds 30%, it is difficult to uniformly dry to the inside, and after consolidation, damage such as cracking, rupture, deformation, swelling, etc. are likely to occur. This is the setting based on this. That is, it is desirable that the oil palm material W and the lauan thin plate L have a substantially uniform moisture content over the entire thickness, so that the entire thickness is plastically processed with a substantially uniform compression rate. A range of 30% is preferable. More preferably, the water content is in the range of 13% to 18%. In addition, a moisture content is measured using measuring instruments, such as a high frequency moisture content meter, for example.

Next, a stacking step of Step S30 is performed in which a plurality of dried oil palm materials W are stacked. That is, it is a step of laminating a plurality of oil palm materials W and lauan thin plates L that are dried in the drying step of step S20 and step S21 in a predetermined state. The pre-pressurized multilayer material NW is obtained by the stacking process of step S30. The multi-layered material NW before pressurization has the same outer shape, but the oil palm material W and the lauan thin plate L in the stacking direction are merely overlapped by their own weight.
Here, a compacted wood manufacturing apparatus MC that performs compaction of the pre-pressurized multilayer material NW formed by laminating the oil palm material W and the lauan thin plate L will be described with reference to FIGS. 5 and 6.

When the laminated plywood PW is manufactured from the pre-pressing multilayer material NW by the compacted material manufacturing apparatus MC, as shown in FIG. 6A, the lower press on the fixed side of the press panel 10 in the compacted material manufacturing apparatus MC. The upper press board 10A rises with respect to the board 10B, and the pre-pressing multilayer material NW that has been dried to a predetermined condition in advance is inside the internal space IS and the positioning hole 18 formed by the upper press board 10A and the lower press board 10B. Placed on.

Subsequently, as shown in FIG. 6B, the upper press platen 10A is lowered at a predetermined pressure with respect to the pre-pressing multilayer material NW placed on the positioning hole 18 of the fixed-side lower press platen 10B. The upper surface of the pre-pressurized multilayer material NW, that is, in the present embodiment, is brought into contact with the surface of the lauan thin plate L1 and the oil palm materials W2,. In step S31, timer control by the timer I is started. Looking at the timer I in step S31, it is determined whether it is the heating timing in step S32, and it is determined whether it is the compression timing in step S33.
At the heating timing, water vapor of a predetermined temperature (for example, 110 to 180 [° C.]) is passed through the piping path 15 of the upper press panel 10A and the piping path 16 of the lower press panel 10B in step S34, and the internal space IS and the positioning hole 18 is maintained at a predetermined temperature (for example, 110 to 180 [° C.]). When it is determined in step S32 that it is not the heating timing, it is determined in step S33 whether it is the compression timing, and when it is the compression timing, the compression process is started in step S35, and is lowered at, for example, 0.5 to 3 kg / cm ² . .

That is, in step S35, the compression force of the upper press board 10A is set to a predetermined pressure (for example, 20 to 50 kg / cm ² ) with respect to the lower press board 10B on the fixed side, and the multilayer material NW before pressurization is the upper press board. 10A and the lower press panel 10B are heated and compressed for a predetermined time (eg, 5 to 40 [min]). Also, in step S36, it is determined whether the heating / compression is completed, and the routine processing from step S31 to step S36 is performed until the end time is reached.
In order to prevent cracking, the compression force in step S35 is a temperature rise of the multilayer material NW before pressurization, that is, the internal temperature state of the multilayer material NW before pressurization according to the elapsed time of the timer I in step S36, heating It is desirable to gradually increase with the passage of time, and it is preferable to set the heating and compression time in consideration of the heating time.
At the beginning of the consolidation process, first, heating in the heating process (step S34) is started, and the valve V1, valve V2, and valve V3 are opened, and the piping 15 and the lower press panel of the upper press panel 10A from the boiler device (not shown). Steam for heating is passed through the piping path 16B of 10B, the interior space IS and the positioning hole 18 are maintained at a predetermined heating temperature, and the stacked pre-pressurized multilayer material NW is heated.

Furthermore, as shown in FIG. 6 (c), when the peripheral edge portion 10a of the upper press board 10A comes into contact with the peripheral edge part 10b of the lower press board 10B, the seal member 11 disposed on the peripheral edge part 10a of the upper press board 10A. The internal space IS and the positioning hole 18 formed by the upper press board 10A and the lower press board 10B are hermetically sealed. Here, steam is supplied into the internal space IS and the positioning hole 18 through the pipe port 12 a of the pipe 12. At this time, the water vapor simultaneously wets the oil palm material W or the pre-pressurized multilayer material NW in a dry state to a predetermined humidity with a good balance. Then, with the internal space IS and the positioning hole 18 sealed, the compression force by the upper press board 10A and the lower press board 10B is maintained, and a predetermined temperature (for example, 150 to 210 [° C.]) based on the timer I in step S31. ).

In the present embodiment, the internal space IS and the internal space IS when the internal space IS and the positioning hole 18 formed by the upper press board 10A and the lower press board 10B are sealed via the seal member 11 The dimensional interval in the vertical direction of the positioning holes 18 is set to the finished dimension in the thickness direction when the pre-pressing multilayer material NW becomes the laminated plywood PW having a compression rate of 70% by the press board 10. For this reason, the compression ratio of the entire thickness of the multilayer material NW before pressurization, that is, the change in the plate thickness due to the compression of the multilayer material NW before pressurization, is that the peripheral portion 10a of the upper press panel 10A is It will be decided by contacting.

In the sealed state of the internal space IS and the positioning hole 18 shown in FIG. 6C, the compression force of the upper press board 10A and the lower press board 10B is maintained at the compression pressure (preferably within the range of 1 to 100 kg / cm 2). In addition, the internal space IS and the positioning hole 18 are maintained at a predetermined temperature (for example, 150 to 210 [° C.]) for a predetermined time (for example, 30 to 120 [min]), and the subsequent cooling compression is released. Sometimes, heat treatment is performed to form a laminated plywood PW that does not return. At this time, high-temperature and high-pressure vapor pressure is generated between the surrounding surface of the pre-pressurized multilayer material NW and the inside thereof through the internal space IS and the positioning hole 18 which are sealed by the upper press board 10A and the lower press board 10B. You can go in and out.
As described above, in the present embodiment, the upper press board 10A and the lower press board 10B are in surface contact with the front and back surfaces of the pre-pressurized multilayer material NW and are held in the sealed internal space IS and the positioning holes 18. Therefore, the multilayer material NW before pressurization is sufficiently heated in its entire thickness, and is efficiently compressed and deformed.

Next, as shown in FIG. 6D, when the heat compression process is performed in a sealed state of the internal space IS and the positioning hole 18, the internal space IS and the positioning hole are detected by the pressure gauge P2 as a vapor pressure control process. 18 vapor pressure is detected, and the valve V5 is appropriately opened and closed. Thereby, high-temperature and high-pressure water vapor is discharged from the internal space IS and the positioning hole 18 to the drain pipe 14 side through the pipe port 13a and the pipe 13, and in particular, the moisture content of the outer layer portion of the multilayer material NW before pressurization. Therefore, the excess internal space IS and moisture in the positioning hole 18 are removed, and the internal space IS and the positioning hole 18 are adjusted to have a predetermined vapor pressure. Further, if necessary, a predetermined vapor pressure can be supplied to the internal space IS through the pipe 12 and the pipe port 12a (FIG. 5) connected to the valve V4. As a result, the fixing of the heat compression treatment of the wood, that is, the so-called immobilization of the wood is further promoted.
Furthermore, the valve V5 is opened as a vapor pressure control process immediately before shifting from the heating compression to the cooling compression by the upper press panel 10A and the lower press panel 10B, so that the internal space passes through the piping port 13a and the piping 13. High-temperature and high-pressure steam is discharged from the IS and positioning hole 18 to the drain pipe 14 side.

When it is determined in step S36 that the heating process in step S34 and the compression process in step S35 based on the operation of the timer I in step S31 are completed, the fixing process is started in step S37. In the immobilization process, normal temperature cooling water or ground water is passed through the piping path 15 of the upper press panel 10A and the piping path 16 of the lower press panel 10B, as shown in FIG. As a result, the upper press board 10A and the lower press board 10B are cooled to around room temperature and held for a predetermined time (for example, 10 to 120 [min] for oil palm) depending on the material. At this time, the compression force of the upper press disk 10A with respect to the lower press disk 10B on the fixed side is maintained at a predetermined pressure (for example, 20 to 50 kg / cm ² ) that is the same as the pressure at the time of heat compression. The board 10A and the lower press board 10B are cooled.
Finally, as shown in FIG. 6 (f), a pressure releasing process is entered in step S39, and the upper press platen 10A is raised with respect to the fixed-side lower press platen 10B. A series of processing steps is completed when the finished laminated plywood PW is taken out.

Here, in the oil palm material W and the lauan thin plate L to be laminated, they may be laminated with the same fiber direction, or may be laminated with their fiber directions orthogonal to each other.
When laminated with the same fiber direction, the wood fibers softened in the consolidation process are easily entangled with the other wood surface layer fibers of the same fiber direction adjacent to the lamination direction (longitudinal direction), The wood fixed in the intertwined state is firmly joined. In addition, since the expansion rate and contraction rate of the joint surface can be made completely equal, no stress is applied to the joint surface even if the ambient environment conditions change. Accordingly, the bonding strength is high and the mechanical strength is high, and a stable dimensional shape after consolidation is ensured.

On the other hand, when laminated with the fiber directions orthogonal to each other, even if expansion and contraction force occurs due to changes in the surrounding environmental conditions after consolidation, the woods interact with each other to prevent warping deformation in a specific direction Is done.
In particular, when the total number of sheets is an odd number, when laminated with the fiber directions orthogonal to each other, the fiber direction of the single plate is parallel and the cross section is symmetric on the front and back, so distortion due to changes in ambient environmental conditions is prevented. The In addition, when the total number of sheets is an even number of four or more, the fiber directions on the front and back sides are laminated by laminating the same fiber direction in a part of the inside and laminating the other with the fiber directions orthogonal to each other. It is possible to prevent distortion and the like due to changes in the ambient environmental conditions.

In addition, in the oil palm material W and the lauan thin plate L to be laminated, the bark side surfaces, which are surfaces cut parallel to the fibers and are parallel to the fibers, are opposed to each other. Are preferably laminated. The warp deformation in a specific direction due to the difference in cell density between the bark side surface and the bark side surface can be prevented by causing the bark side surfaces of each other or the bark side surfaces of each other to face each other and being joined by consolidation.

Furthermore, it is preferable that the dried laminated plywood PW is laminated by disposing materials having a small air-dry specific gravity after drying on the front and back. As a result, wood having a small air-drying specific gravity after drying is disposed on the front and back layers in contact with the upper press platen 10A and the lower press platen 10B, and compaction processing is performed. Therefore, the air-drying specific gravity after drying is small. The wood is sufficiently heated and compressed by the upper press board 10A and the lower press board 10B to reduce the difference in specific gravity between the woods, and the difference in the rate of dimensional change after production. Therefore, the stability of the dimensional shape after commercialization increases.

Here, it is preferable that the heating temperature in the heating process in the initial stage of compression is in the range of 110 ° C. to 160 ° C. If the heating temperature is too low, sufficient compacting will not be achieved, resulting in insufficient strength, poor bonding between wood, and dimensional shape deformation due to hygroscopic drying after product production, while the heating temperature is too high. The surface may be carbonized to change to black and the color tone or scent peculiar to wood may be impaired, or the material may deteriorate and the strength may be lowered and become brittle. According to the experiments by the present inventors, it has been found that an appropriate temperature condition is in the range of 110 ° C. to 160 ° C. By using this temperature condition, it is possible to prevent improper fixing in the compacting process, and material deterioration such as surface carbonization and lowering of material strength. More preferably, the heating temperature in the heating step in the initial stage of compression is in the range of 120 ° C to 140 ° C. In addition, specific set temperature is set according to the moisture content etc. of the oil palm material W and the lauan thin board L. FIG.

In the present embodiment, in particular, the multilayer material NW before pressurization is dried by heating and compressing by surface contact of the press panel 10 according to the routine of steps S31 to S36, and by applying pressure after heating to the heating temperature. Even when warping deformation occurs, it can be flattened without causing breakage, cracking, cracking, etc., and heat compression can be performed efficiently. Furthermore, while the multilayer material NW before pressurization is heated and compressed and the internal space IS and the positioning hole 18 are kept in a sealed state, the water vapor originally contained in the multilayer material NW before pressurization becomes the vapor pressure. Thus, the dried wood DW can be freely diffused and discharged through the internal space IS and the positioning hole 18, so that the entire thickness is efficiently and uniformly heated and compressed.

Further, the predetermined pressure in step S33 for compressing the pre-pressurized multilayer material NW is preferably in the range of 1 to 100 kg / cm ² . If the pressure is too low, immobilization will be poor in the compacting process, while if the pressure is too high, cracks may occur on the surface. According to the inventors' experiments, suitable pressure conditions are in the range of 1-100 kg / cm ² . By adopting this pressurizing condition, it is possible to prevent immobilization defects and occurrence of cracks in consolidation. More preferably, it is in the range of 10 to 50 kg / cm ² .
In addition, when the compression speed at this time is high, water vapor and air in the multilayer material NW before pressurization are difficult to escape, and the pressure acting on the multilayer material NW before pressurization increases, so that cracks occur, There is a risk of internal cracking due to insufficient softening of wood. On the other hand, when the compression speed is low, the load on the surface in contact with the upper press board 10A and the lower press board 10B is increased, and cracks or the like may occur. Therefore, it is desirable that the compression pressure at this time be gradually increased according to the temperature transmission state inside the pre-pressurized multilayer material NW.

And according to the experiments by the present inventors, it is preferable that the time for heating and compressing be within a range of 10 minutes to 40 minutes. This time condition can prevent subsequent immobilization due to the treatment time being too short and carbonization of the surface due to the treatment time being too long. More preferably, the predetermined compression time is in the range of 20 minutes to 30 minutes. In addition, it is preferable to set also the time of this heat compression considering the transmission state (time) of the temperature inside the multilayer material NW before pressurization.

Furthermore, when the internal space IS and the positioning hole 18 formed by the upper press board 10A and the lower press board 10B of the press board 10 are in a sealed state via the seal member 11, the internal space IS and the positioning hole 18 are vertically moved. The dimension interval is set to the finished dimension in the thickness direction when the plurality of laminated multi-layered pre-pressurized materials NW are consolidated into a laminated plywood PW having an air-dry specific gravity of 0.8 or more. For this reason, the compression ratio of the entire thickness of the laminated multilayer material NW before pressurization, that is, the change in the plate thickness due to the compression of the plurality of laminated multilayer materials NW before pressurization is the peripheral portion 10a of the upper press panel 10A. Is determined by contacting the peripheral edge portion 10b of the lower press panel 10B.

Here, it is preferable that the final heating temperature for maintaining the compression and heating state in the compacting process is in the range of 120 ° C to 210 ° C. If the heating temperature is too low, the immobilization becomes sweet and chemical changes due to the action of water vapor cannot be caused sufficiently, resulting in improper immobilization, which tends to occur due to moisture absorption or deformation due to drying, while the heating temperature is high. If it is too much, the surface may be carbonized to change to black, and the color tone or scent peculiar to wood may be impaired, or the material may deteriorate and the strength may be lowered and become brittle. According to our experiments, suitable temperature conditions are in the range of 120 ° C to 210 ° C. By setting this temperature condition, it is possible to prevent immobilization failure in the compacting process, maintain dimensional shape stability, and prevent material deterioration such as surface carbonization and material strength reduction. More preferably, the heating temperature is in the range of 120 ° C to 140 ° C.

Further, according to the experimental study by the present inventors, the compression time immediately before immobilization is preferably within the range of 10 minutes to 120 minutes. By this time condition, it is possible to prevent immobilization failure due to the treatment time being too short and carbonization of the surface due to the treatment time being too long. More preferably, the predetermined time is in the range of 30 minutes to 90 minutes. The specific set time for performing the heating / compression process immediately before the immobilization is set in consideration of the moisture content of the multilayer material NW before pressurization.

Incidentally, the start of the vapor pressure control in the internal space IS and the positioning hole 18 in the sealed state due to the introduction or discharge of water vapor is performed after the temperature of the upper press panel 10A and the lower press panel 10B reaches a specific heating temperature. It is desirable to be done. In this way, water vapor can penetrate into the pre-pressurized multilayer material NW, thereby causing sufficient chemical changes in the oil palm material W and the lauan thin plate L. As a result, the oil palm material W and the lauan thin plate are obtained. L can be fixed sufficiently and uniformly, and the return due to moisture absorption, the deformation due to drying, and the like are small. That is, when the introduction of water vapor in the closed internal space IS and the positioning hole 18 is started before the temperatures of the upper press board 10A and the lower press board 10B reach a specific heating temperature, the water vapor is condensed. The interior space IS and the positioning hole 18 in the sealed state are filled with water, and the moisture content of the wood increases, and as a result, return due to moisture absorption, deformation due to drying, and the like are likely to occur. Further, even when the discharge of water vapor in the internal space IS and the positioning hole 18 in the sealed state is started before the temperatures of the upper press board 10A and the lower press board 10B reach the second heating temperature, the water content of the outer layer portion is also increased. The excess internal space IS based on the rate and the moisture in the positioning hole 18 are difficult to be removed, and the moisture content of the wood increases, so that return due to moisture absorption, deformation due to drying, and the like easily occur.
In addition, it is preferable to end the vapor pressure control before starting the cooling described later. If the vapor pressure control is not finished before starting the cooling described later, the cooling processing efficiency is lowered.

Further, when steam is introduced into the internal space IS and the positioning hole 18 in a sealed state to control the vapor pressure, the temperature of the upper press panel 10A and the lower press panel 10B reaches a specific heating temperature. It is preferable to introduce a water vapor pressure and temperature equal to or lower than the water vapor pressure and temperature in the internal space IS and the positioning hole 18. When the pressure and temperature of the introduced water vapor are higher than the water pressure and temperature in the internal space IS and the positioning hole 18, the water is condensed and the internal space IS and the positioning hole 18 in a sealed state are filled with water. As a result, the water content of the oil palm material W and the lauan thin plate L increases, and as a result, return due to moisture absorption, deformation due to drying, and the like are likely to occur. In addition, in the internal space IS and the positioning hole 18 in a sealed state, when excess moisture based on the moisture content of the outer layer portion of the multilayer material NW before pressurization exists, the high temperature in the internal space IS and the positioning hole 18 By appropriately discharging high-pressure water vapor, the pressure is adjusted to a predetermined vapor pressure.

Subsequently, the immobilization process of step S37 is performed while maintaining the same predetermined pressure (preferably within the range of 1 to 100 kg / cm ² ) as the pressure in the heating process of step S34 and the compression process of step S35. V11, the valve V12, and the valve V13 (FIG. 5) are opened, and normal temperature cooling water is passed from the boiler device (not shown) through the piping 15 of the upper press panel 10A and the piping 16 of the lower press panel 10B. As shown in (e), the upper press board 10A and the lower press board 10B are cooled to around room temperature and held for a predetermined time (for example, 10 to 120 [min]).
Finally, the pressure is released in the fixing step of step S37, and as shown in FIG. 6 (f), the upper press disk 10A is gradually raised and separated from the fixed-side lower press disk 10B. The pressure and the sealed state are released, and the laminated plywood PW as a finished product is taken out from the internal space IS and the positioning hole 18 to complete a series of processing steps.

In this way, fixing in a consolidated state is stabilized by cooling under a pressure state in which deformation does not occur. And after cooling in a pressurized state, by releasing the pressurization, that is, by lowering the water vapor pressure in the multilayer material NW before pressurization by cooling, gradually releasing the pressure to release the internal vapor pressure Thus, the laminated plywood PW can be liquefied and removed when the cooling compression is released, and there is no bulging deformation, cracking, puncture or the like. That is, according to the laminated plywood PW of the present embodiment, stable quality is ensured without causing bulging deformation, cracking, destruction, etc. after compression release.

In addition, the external force applied in the direction perpendicular to the length direction of the fibers of the laminated pre-pressing multilayer material NW is heated to compress the thickness of the laminated pre-pressing multilayer material NW, and the air-drying specific gravity is increased by compaction processing. A laminated plywood PW having a thickness of 0.8 or more is manufactured. And the laminated plywood PW obtained in this way is firmly joined to each other by consolidation. This is because cellulose, hemicellulose, and lignin are hydrogen-bonded by compaction processing, and especially the palm of an oil palm contains a lot of sugars, lignin, plastic components, etc., and these components are decomposed and softened by compaction processing. It functions as a binder by being recrystallized and rebonded after moving between woods, and further, the wood on the surface layer of the oil palm material W is softened by the consolidation process, and the wood is adjacent in the stacking direction. It is considered that the woods are firmly joined by being intertwined with the fibers.
In addition, although the inventors' analysis has recognized that the resin component such as lignin and the saccharide component such as cellulose and hemicellulose are the main compositions, the involvement of other components cannot be denied if the analysis ability is improved. Even if it is small, it cannot be denied that there may be other components that contribute to consolidation.

As described above, according to the laminated plywood PW according to the present embodiment, wood is bonded to each other without using an artificial adhesive or environmental adhesive due to formaldehyde or the like, or a natural adhesive having a high cost. It is gentle and can reduce costs.
In addition, when the oil palm material W and the lauan thin plate L are joined by using an adhesive, it is common to apply the adhesive and then press the adhesive to cure the adhesive. However, according to the laminated plywood PW according to the present embodiment, the wood is joined to each other without using an adhesive by the compacting process. A process is unnecessary and the manufacturing process can be simplified.

The laminated plywood PW obtained in this way is compacted to reduce the gaps in the oil palm material W, and the lignin, hemicellulose, etc. constituting the cell wall are softened / decomposed and recombined / re-assembled. The disadvantage of the oil palm material W, which is crystallized to increase the cell density, has a low specific gravity, is low in strength, and easily deforms, is complemented, and high strength and stable dimensional shape are ensured. In particular, the entire thickness of the laminated oil palm material W is uniformly compressed by carrying out the consolidation process so that the air-dry specific gravity is 0.8 or more, the properties of the oil palm material W are changed, and the hardness and the like are remarkable. In addition, there is less variation in physical properties and characteristic values such as hardness, and there is also little variation in expansion rate and drying rate due to changes in ambient environmental conditions, so that deformation and the like can be suppressed, thereby improving dimensional shape stability. Increase. Therefore, the physical properties are stable, the quality between products is small, and the commercial value is high. Furthermore, it is consolidated in a state where a plurality of dried oil palm materials W are stacked, and the expansion rate and contraction rate due to changes in ambient environmental conditions are substantially uniform on the bonding surface, so that stable bonding is maintained. In addition, a stable dimensional shape is ensured without causing distortion, deformation, cracks, and the like due to stress applied to the joint surface due to changes in ambient environmental conditions.

In particular, when the oil palm material W is laminated with the same fiber direction, the fibers of the surface layer softened in the consolidation process are the same as the tree surface layer of the Lauan thin plate L adjacent in the vertical direction with the same fiber direction. The oil palm material W and the lauan thin plate L, which are easily entangled with the fibers and fixed in the entangled state, are firmly joined. In addition, since the expansion rate and contraction rate at the joint surface can be made completely equal, no stress is applied to the joint surface when the ambient environmental conditions change. Therefore, the bonding strength is high, the mechanical strength is also high, and high dimensional shape stability is ensured.

On the other hand, when the multilayered material NW before pressurization is laminated with the fiber directions orthogonal to each other, even if expansion and contraction force is generated due to changes in the surrounding environmental conditions after the consolidation process, the mutual woods interact with each other and specify Directional warpage deformation is prevented. In particular, when the total number of sheets is an odd number, when laminated with the fiber directions orthogonal to each other, the fiber direction of the single plate is parallel and the cross section is symmetric on the front and back, preventing distortion due to changes in ambient environmental conditions, etc. Is done.
If the total number of sheets is an even number, the same fiber direction is laminated in a part of the inside, and the others are laminated with the fiber directions orthogonal to each other, so that the front and back fiber directions are aligned and the ambient environmental conditions It is possible to prevent distortion and the like due to the change of.

The laminated plywood PW of the present embodiment is densified by compaction processing on the front and back surfaces that are compressed surfaces, and the fibers of the oil palm material W and the lauan thin plate L are entangled and fixed, and there is a concern about the environmental load. Even if it does not use the artificial adhesive and natural adhesive which are expensive, it is difficult to peel off from the outer surface, and the surface quality is good. That is, peeling from the fiber surface can be suppressed without using an artificial adhesive or a high-cost natural adhesive, which is environmentally friendly and can reduce costs.
Furthermore, since the entire thickness is plastically processed, even if a large chamfering process or curved surface process is performed on the ridgeline on the thickness side surface, the material strength with high hardness is ensured at the end surface.

Incidentally, even in the case of using an oil palm material W in the vicinity of a soft tree core having a high water content particularly in oil palm, the strength can be increased by compaction processing, or temperature and compression control are performed in compaction processing. In this way, excess water can be discharged, and the water vapor pressure inside the multilayer material NW before pressurization is uniformly and suitably adjusted, so that bulge deformation after compression processing and the like are also suppressed. Therefore, it is possible to form the laminated plywood PW having sufficient strength and stable dimensional shape. Therefore, effective utilization of the entire trunk of oil palm can be achieved.
In particular, when the oil palm material W and the lauan thin plate L that have been dried are arranged on the front and back surfaces having a small air-dry specific gravity after drying, as described above, the upper press panel 10A and the lower press panel 10B A material having a low air-dry specific gravity after drying is disposed on the front and back layers that come into contact with each other, and compaction processing is performed. As a result, the difference in specific gravity between the woods is reduced, and the difference in the dimensional change rate after commercialization is also reduced. Therefore, the stability of the dimensional shape after commercialization increases.

As described above, the laminated plywood PW according to the present embodiment peels the soft oil palm trunk, which has a high moisture content, as the oil palm material W and the lauan thin plate L, and then drys them, and further laminates and compacts them. As a result, the strength and hardness not only on the surface but also on the entire plate thickness are greatly improved, and a wide range of applications such as flooring materials, waistboard materials, indoor furniture materials, and housing exterior materials used by surface coating are expected. In particular, since the surface hardness is increased by compaction processing and sufficient strength and hardness can be ensured even if the thickness is small, the thickness can be reduced in commercialization.

In this way, the thickness of the lauan thin plate L1 and the oil palm materials W2,..., W5 is heated and compressed by the external force applied in the direction perpendicular to the length direction of the fibers of the lauan thin plate L and the oil palm material W. , The laminated plywood PW having a compression ratio of 60% or more is manufactured as a whole, and at this time, the Lauan thin plate L and the Lauan thin plate L1 and the compressive force in the thickness direction of the oil palm materials W2,. The elongation in the direction parallel to the plane of the oil palm material W is restricted by the movable frame 23 and does not extend.

Moreover, the inventors performed the test of Table 4 and Table 5 as severe use conditions. Although many samples were used, the samples submitted this time are extracted from the areas where remarkable features appear.
The laminated plywood A2 is composed of five oil palm materials W2,..., W5 of 3.0 mm and a lauan thin plate L1 of 3.0 mm. The laminated plywood B2 includes four oil palm materials W and a 3.0 mm lauan thin plate L1, and the thickness of the oil palm material W is 2.5 mm + 3.0 mm + 3.0 mm + 2.5 mm. The laminated plywood C2 includes a 3.0 mm lauan thin plate L1 and three oil palm materials W, and the thickness of the oil palm material W is 2.5 mm + 3.0 mm + 2.5 mm. The laminated plywood D2 is made of a 3.0 mm lauan thin plate L1 and three oil palm materials W, and the thickness of the oil palm material W is set to 3.0 mm + 3.0 mm + 3.0 mm. In either case, the uppermost position is the lauan thin plate L1 having a thickness of 3.0 mm.

Here, a rigorous test was conducted in which it was applied to 30 ° C. hot water and 60 ° C. hot water. Even when the laminated plywood A2 and the laminated plywood B2 were immersed in hot water at 30 ° C., there was no change within 90 minutes. However, when immersed in hot water at 60 ° C., the laminated surface of laminated plywood B2 softened in 45 minutes, and the laminated surface of laminated plywood A2 softened in 60 minutes.
In addition, in the laminated plywood C2, the laminated surface softened in 45 minutes even when immersed in hot water at 30 ° C. That is, this is not a problem of 60 ° C. or higher of the reaction start temperature of hemicellulose, but it can be estimated that the influence of compressive force is exerted. When the compression force is increased, the air inside the laminated plywood C2 disappears and the dense bonding is performed. However, if the compression force is weak, only the formal bonding is performed without crushing the fibers. It is estimated that the whole was softened. Naturally, even when immersed in hot water at 60 ° C., the laminated surface softened in 30 minutes.
And by increasing the thickness of the oil palm material W and increasing the compressive force, the laminated plywood D2 is attached to hot water at 30 ° C. for 60 minutes or less, and 45 minutes with hot water at 60 ° C. I endure the following. Therefore, it is a necessary requirement to increase the compression force. From the viewpoint of the compression rate, a compression rate of 60% or more, more preferably 65% or more is desirable. In particular, when the compression rate is 70% or more, the safety is increased. When the compression rate is low, it is desirable to apply a water-repellent coating agent to the surface.
In contrast, Table 2 and Table 3 show test data for only the oil palm material W.

When the lauan thin plate L1 and the oil palm material W are mixed, the oil palm material W is further compressed, and the compression force of the lauan thin plate L1 is weakened. A laminated plywood PW is obtained.
In particular, under conditions where the laminated plywood PW is immersed in hot water at 30 ° C. in nature, it can be used if the thickness of the oil palm material W is 2.5 mm and the compression rate is 65% or more. In addition, the condition that the laminated plywood PW is immersed in hot water at 60 ° C. is to confirm the possibility that hemicellulose inhibits the binding between lignin and cellulose. If the compression ratio is 65% or more, It also indicates that it is difficult to appear.
However, since it means that the boundary line of the compressibility is about 65%, in mass production, it is desirably 65% or more, and the thickness of the oil palm material W is also 3.0 mm or more. Is desirable.

The joint partial fracture test of this embodiment was performed.
In the test, lauan thin plate L1 of about 3 mm thickness and oil palm materials W2,..., W5 of about 3 mm thickness are compacted to a thickness of about 11 mm, cut into a 20 cm square, and adhesive on both sides. When the 30 mm zelkova plates Q1 and Q2 are attached and a tensile force is applied between the zelkova plate Q1 and the zelkova plate Q2 on both sides, the lauan thin plate is joined only by the resin component and sugar component contained in the oil palm material W. It peeled between L1 and the oil palm material W2. Then, although it experimented using five laminated plywood PW, all peeled between the lauan thin board L1 and the oil palm material W2.

Therefore, a thermosetting resin is applied in advance to the surface of the lauan thin plate L1 facing the oil palm material W2, and the lauan thin plate L1 having a thickness of about 3 mm and the oil palm materials W2,. Compacted. And in order to peel between the lauan thin plate L1 and the oil palm material W2, a tensile force was applied between the double-sided peeling plate Q1 and the peeling plate Q2, but the peeling between the lauan thin plate L1 and the oil palm material W2 occurred. Did not occur. That is, it has been confirmed that firm bonding is possible when the adhesive is replenished.

Furthermore, the inventors conducted experiments similar to those in Tables 2 and 3 using three oil palm base materials W each having a thickness of 4 mm. It was confirmed that the compression ratio was 48.75%, which was 50%, and it was not immersed in hot water at 60 ° C. That is, it was confirmed that the compression rate should be 50% or more, and if the compression rate was 40% or more, there was no practical problem.

As described above, the laminated plywood according to the present embodiment is formed by stripping a predetermined length of oil palm trunk WD to a predetermined thickness with a rotary race while rotating it in the circumferential direction, and then compressing it. One or more oil palm materials W each having a thickness of 1 mm or more and a lauan trunk LD, a Chinese trunk, or a coniferous trunk having a predetermined length are peeled off from the outer periphery to a predetermined thickness while rotating in the circumferential direction. One or more of Lauan thin plate L, China thin plate, or softwood thin plate are arranged facing the oil palm material W, compressed, fixed, and integrally joined.

Therefore, one or more oil palm materials W and one or more of Lauan thin plate L, China thin plate, and softwood thin plate are arranged facing the oil palm material W, and they are compressed, fixed, and joined together. Therefore, the laminated plywood PW bonded with natural products using the resin component and the sugar component contained in the oil palm material W is obtained. Moreover, since one or more of the lauan thin plate L, the Chinese thin plate, and the softwood thin plate can be used as a core material and used as a design surface, a laminated plywood PW suitable for the application can be manufactured.
Therefore, even if a thermosetting resin is applied to the surface of the lauan thin plate L1 facing the oil palm material W2 in advance, it becomes a quarter of the usage fee of the adhesive, and the use of a formaldehyde adhesive that causes sick house syndrome A laminated plywood PW using the components inherently held by the oil palm is obtained.

Since this oil palm trunk WD has no nodes and no annual rings, when the oil palm material W is created by peeling off from the outer periphery to a predetermined thickness with a rotary race, a homogeneous oil palm material W without nodes is obtained. The laminated plywood PW made of the oil palm material W is homogeneous. Moreover, since the joining force is changed by the resin component and sugar component contained in the oil palm itself depending on the applied temperature and pressure, an arbitrary adhesive force can be obtained by controlling the applied temperature and pressure. And in what joins the several oil palm material W with the resin component and sugar component which oil palm itself contains, and laminate plywood PW is used, since other synthetic resin and synthetic rubber are not used as an adhesive material Can return to nature, does not cause pollution problems.

Furthermore, the oil palm material W has almost no voids due to the compressive force when joined by the action of a resin component such as lignin contained in the oil palm itself and sugars such as cellulose and hemicellulose. In addition, it is waterproof and insect-proof and has a long service life even when used as a building material.
In particular, hemicellulose has a function of binding lignin and cellulose, and it is unclear how much they interfere with each other when oil palm is naturally cultivated. However, it was confirmed that by raising the temperature to a predetermined temperature, for example, 80 ° C. or higher of the reaction start temperature of lignin, the reaction start temperature of hemicellulose was 60 ° C. or higher, and they reacted with each other to become firm characteristics.

As described above, the laminated plywood of the present embodiment is formed by peeling a predetermined length of oil palm trunk WD to a predetermined thickness with a rotary race while rotating it in the circumferential direction, and then compacting it. One or more oil palm materials W each having a thickness of 1 mm or more and a lauan trunk LD, a Chinese trunk, or a coniferous trunk of a predetermined length are peeled off from the outer periphery to a predetermined thickness while rotating in the circumferential direction. One or more of Lauan thin plate L, China thin plate, or softwood thin plate are arranged facing the oil palm material W, compressed, fixed, and integrally joined.

Therefore, one or more oil palm materials W and one or more of Lauan thin plate L, China thin plate, and softwood thin plate are arranged facing the oil palm material W, and they are compressed, fixed, and joined together. Therefore, the laminated plywood PW bonded with natural products using the resin component and the sugar component contained in the oil palm material W is obtained. Moreover, since one or more of the lauan thin plate L, the Chinese thin plate, and the softwood thin plate can be used as a core material and used as a design surface, a laminated plywood PW suitable for the application can be manufactured.
Therefore, the use of the formaldehyde-based adhesive that causes sick house syndrome is suppressed, and a laminated plywood PW using the components that oil palm originally has is obtained.

The laminated plywood PW of the above embodiment is formed by peeling a predetermined length of the oil palm trunk WD from the outer periphery with a rotary race while rotating it in the circumferential direction, and then compacting it. A lauan thin plate formed by peeling one or more oil palm materials W of 1 mm or more and a predetermined length of Lauan stem LD, China trunk or coniferous trunk to the predetermined thickness from the outer periphery with a rotary race while rotating in the circumferential direction One or more of L, China thin plate, or softwood thin plate is arranged facing the oil palm material W, and they are integrally joined.
Therefore, at least one oil palm material W that has been compacted and one or more of lauan thin plate L, china thin plate, and softwood thin plate are arranged facing oil palm material W, and they are joined together. Therefore, when the resin component and sugar component contained in the oil palm material W are insufficient, an adhesive is added to one or more joining objects of the Lauan thin plate L, the Chinese thin plate, and the coniferous thin plate. A desired laminated plywood PW is manufactured by bonding. Therefore, since the adhesive is used when the resin component and the sugar component contained in the oil palm material W are insufficient, the use of the formaldehyde-based adhesive that causes sick house syndrome is suppressed, A laminated plywood PW using the components it has is obtained.

The laminated plywood PW of the above embodiment is formed by peeling a predetermined length of oil palm trunk WD from the outer periphery with a rotary race while rotating it in the circumferential direction, and then compacting it. A lauan thin plate formed by peeling one or more oil palm materials W of 1 mm or more and a predetermined length of Lauan stem LD, China trunk or conifer tree trunk to the predetermined thickness from the outer periphery with a rotary race while rotating in the circumferential direction One or more of L, China thin plate, or softwood thin plate is placed facing the oil palm material W, and they are joined together, but this is similar to the oil palm material W. It is premised on a thin plate formed by peeling from the outer periphery to a predetermined thickness by a race.
However, at least one of Lawan, Sina, or conifer is one or more of Lawan, Sina, or conifer, which has a predetermined length of Lauan or Sina or conifer tree trunks formed in a plate shape in the length direction of the trunk. It is also possible to arrange the plates facing the oil palm material W and join them together.
At this time, the joint may be compressed as a position process of the consolidation process, or may be compression for joining separately from the consolidation process.

That is, the laminated plywood PW of the above embodiment is formed by peeling a predetermined length of the oil palm trunk WD from the outer periphery with a rotary race while rotating the oil palm trunk WD in the circumferential direction, and then compacting it. Lauan, Sina, and conifers in which one or more oil palm materials W having a thickness of 1 mm or more and a trunk of other timber such as Lawan or Sina or conifers of a predetermined length are formed in a plate shape in the length direction of the trunk One or more pieces of wood such as the like can be arranged facing the oil palm material W, and they can be integrally joined.
Therefore, at least one compacted oil palm material W and one or more plates of lauan, china, conifer are arranged facing the oil palm material W, and they are joined together. Therefore, when the resin component and the sugar component contained in the oil palm material W are insufficient, it is desired to add an adhesive to one or more joining objects of Lauan, China, and conifers, The laminated plywood PW is obtained.
Therefore, the use of the formaldehyde-based adhesive that causes sick house syndrome is suppressed, and a laminated plywood PW using the components that oil palm originally has is obtained.

One or more oil palm materials W arranged facing the oil palm material W of the above-described embodiment and integrally joined, and one or more of the Lauan thin plate L, the China thin plate, or the softwood thin plate are integrally joined. The laminated plywood PW is formed by using a resin component and a sugar component contained in the oil palm material W for joining, compressing and fixing them, and joining them integrally.
Therefore, one or more oil palm materials W and one or more of Lauan thin plate L, China thin plate, or softwood thin plate are used as laminated plywood PW, and are integrated using the resin component and sugar component contained in oil palm material W. Therefore, the use of a formaldehyde adhesive that causes sick house syndrome can be suppressed, and a laminated plywood PW using components inherently possessed by the oil palm trunk WD can be obtained.

In order to join one or more oil palm materials W that are arranged facing the oil palm material W of the above embodiment and are integrally joined, the resin component and sugar component contained in the oil palm material W are used, and the lauan thin plate L Or, since the joint surface that is integrally joined to one or more of the China thin plate or the softwood thin plate is added with other adhesive in addition to the resin component and the sugar component contained in the oil palm material W. For joining one or more oil palm materials W, a resin component and a sugar component contained in the oil palm material W are used. Further, one or more of either lauan thin plate L, china thin plate, or softwood thin plate is joined. Therefore, the use of a formaldehyde-based adhesive that causes sick house syndrome can be suppressed, and a laminated plywood PW using components inherently possessed by oil palm can be obtained.

The thin plate process is a process in which the oil palm trunk WD having the predetermined length according to the above embodiment is rotated in the circumferential direction thereof and is peeled off with a cutter CT from the outer periphery to a predetermined thickness by a rotary race to form the lauan thin plate L and the oil palm material W. can do. Moreover, the process of drying the lauan thin plate L and the oil palm material W may be the same process as the process of forming the lauan thin plate L and the oil palm material W, or may be a separate process, and this is the drying process. be able to.
And the process of laminating the dried lauan thin plate L and oil palm material W in a predetermined state as a plurality of pre-pressurized multilayer materials NW is usually used by laminating in units of 2 to 5 sheets, In principle, two or more sheets may be stacked, and this can be used as a stacking process.
In particular, by reducing the number of lauan thin plates L from the number of oil palm materials W, the use of formaldehyde-based adhesives that cause sick house syndrome is suppressed to ½ or less, at least compared to conventional laminated plywood. be able to.

Further, in the step of heating to raise the temperature of the lauan thin plate L and the oil palm material W laminated after the laminating step, the step of introducing water vapor or electric heat and heating or heating with the hot platen supplies heating energy. Therefore, it can be a heating step. Furthermore, the step of applying a compressive force in a direction perpendicular to the surface of the lauan thin plate L and the oil palm material W to the laminated lauan thin plate L and the oil palm material W heated by the heating step is a predetermined compression. It is only necessary to compress the lauan thin plate L and the oil palm material W at a rate, that is, the compression of the multilayer material NW before pressurization. This step can be a compression step.
In addition, after compressing for a predetermined time in the compression step, the temperature supplied in the heating step is lowered, the compression state of the laminated plywood PW is fixed, and the compression force compressed at a predetermined compression rate is released. This can be taken from the laminated plywood PW and used as an immobilization process.

As described above, the laminated plywood PW of the above-described embodiment is formed by peeling the lauan thin plate L and the oil palm material W having a predetermined length in the circumferential direction with a rotary CT to a predetermined thickness from the outer periphery with the blade CT. A thin plate process comprising step S10 and / or step S11 formed on the lauan thin plate L and the oil palm material W, and a drying step comprising step S20 and / or step S21 for drying the lauan thin plate L and the oil palm material W of the thin plate. , A laminating step comprising step S30 of laminating a plurality of lauan thin plates L and oil palm materials W dried in the drying step in a predetermined state, and the lauan thin plates L and oil palm materials W laminated after the laminating step. A heating step consisting of step S34 for heating to raise the temperature of the liquid, and before the heating by the heating step The laminated lauan thin plate L and oil palm material W are perpendicular to the surface of the lauan thin plate L and oil palm material W while restricting the lauan thin plate L and oil palm material W from extending in a direction parallel to the surface of the lauan thin plate L and oil palm material W. Compressing step S35 for compressing for a predetermined time by applying a compressive force in the direction, and step S37 for cooling and fixing by lowering the temperature supplied in the heating step after the pressing for a predetermined time in the compression step. The immobilization process which consists of consists of.

Therefore, since the oil palm trunk WD used in these processes has no nodes and no annual rings, when the Lauan thin plate L and the oil palm material W are created by peeling off from the outer periphery with a rotary race to a predetermined thickness, the homogeneous Lauan thin plate L and The oil palm material W is obtained, and as a result, the laminated plywood PW composed of the lauan thin plate L and the oil palm material W becomes homogeneous. In addition, since the bonding force can be changed by the action of resin components such as lignin contained in the oil palm trunk WD itself and sugars such as cellulose and hemicellulose, depending on the applied temperature and compressive force, the control of the applied temperature and compressive force is possible. Arbitrary adhesive strength can be obtained. And since the lauan thin board L and the oil palm material W are joined by the action of resin components such as lignin contained in the oil palm trunk WD itself and sugars such as cellulose and hemicellulose, the laminated plywood PW is formed. Because other synthetic resins and synthetic rubber are not used as adhesives, they can be returned to nature and cause no pollution problems. Furthermore, due to the compressive force when the oil palm trunk WD itself contains resin components such as lignin and the sugars such as cellulose and hemicellulose, the gap between the lauan thin plate L and the oil palm material W is almost eliminated, and the dense Since it becomes an organization, it is water-resistant, and is water-proof and insect-proof, and has a long service life even when used as a building material.

Manufacture of the laminated plywood of the said embodiment can be generalized as embodiment of the manufacturing method of a laminated plywood as follows.
A step of peeling the oil palm trunk WD of a predetermined length from the outer periphery to a predetermined thickness with a cutter CT and forming it into a plurality of oil palm materials W while rotating in the circumferential direction, and a trunk other than the oil palm of a predetermined length, For example, a thin plate process comprising a step of forming a thin plate such as a lauan thin plate L by rotating the Lauan stem LD in a circumferential direction while rotating the Lauan stem LD with a blade CT to a predetermined thickness from the outer periphery, and the thin plate step A drying process of drying other thin plates such as the formed oil palm material W and lauan thin plate L, and a plurality of other thin plates such as the oil palm material W and lauan thin plate L dried in the drying step are laminated in a predetermined state. A laminating step, a heating step of heating to raise the temperature of other laminates such as the oil palm material W and lauan thin plate L laminated after the laminating step, and the heating process The positioning hole 18 extends in the direction parallel to the surfaces of the other thin plates such as the oil palm material W and the lauan thin plate L, to the other thin plates such as the oil palm material W and the lauan thin plate L heated by the above. Alternatively, a compression step of compressing for a predetermined time by applying a compressive force in a direction perpendicular to the surface of another thin plate such as the oil palm material W and the lauan thin plate L while being regulated by the frame body 20 and a predetermined time compression in the compression step It can be set as the manufacturing method of a laminated plywood which comprises the fixing process which lowers | hangs the temperature supplied in the said heating process, and fixes other thin boards, such as the oil palm material W and the lauan thin board L which were made.

Each side of the five lauan thin plates L1 and the oil palm materials W2,. The frame 20 or the positioning hole 18 for positioning the frame is a frame 20 or the positioning hole 18 for regulating a predetermined stacking surface, and regulates the top and bottom and the left and right of the surfaces of the plurality of thin plates W. Therefore, the thin oil palm material W is prevented from extending in a direction perpendicular to the surface to which the compressive force is applied, and a thick portion and a thin portion are not generated depending on the position of the laminated plywood PW.

In the laminated plywood PW of the above-described embodiment, the lauan thin plate L1 and one thin plate W1 of the plurality of laminated oil palm materials W2, ..., W5 are used as the lauan thin plate L other than the oil palm material W, and the oil palm material The laminated plywood PW including the lauan thin plate L other than W is integrally joined. As described above, the laminated plywood PW formed by integrally joining the oil palm materials W2,..., W5 in the joining composition of the oil palm materials W2,. By arranging one oil palm material W1 of the oil palm materials W2,..., W5 as a Lauan thin plate L other than the oil palm material W on the exposed surface on one side as shown in FIG. L can be joined by the adhesive ability of the oil palm materials W2, ..., W5. Moreover, it can be set as the design which utilized the grain arrange | positioned in the exposed surface of those one sides. Accordingly, only one surface of the laminated plywood PW can be made of thin wood made of other materials. In particular, it is suitable for use as a decorative board.

In the laminating step of laminating a plurality of lauan thin plates L and oil palm materials W in a predetermined state in the above embodiment, one side of the lauan thin plates L1 and oil palm materials W2,. 1 or 2 on both end surfaces is a lauan thin plate L made of wood other than oil palm materials W2,..., W5, and laminated plywood PW including thin plates other than oil palm materials W1,. Are integrally joined. Here, the oil palm material W can be 1 or more.
Of course, the wood other than the oil palm materials W1,..., W5 can be the Lauan thin plate L, or can be a Chinese thin plate or a coniferous thin plate instead of the Lauan thin plate L. Alternatively, one or a combination of the two can be used.

Since the drying step of step S20 or step S21 of the method for manufacturing the laminated plywood of the present embodiment is to dry the moisture content of the oil palm material W within a range of 5% to 30%, cracks, deformations, and swellings are caused. , Rupture and the like are prevented. Therefore, more stable dimensional shape is ensured and the yield is high. Further, when the moisture content is in a dry state within the range of 5% to 30%, it is also suitable for joining with Lauan thin plate, China thin plate, conifer thin plate and the like.

Since the heating temperature in the heating process of step S34 in the production of the laminated plywood of the present embodiment is in the range of 110 ° C. to 170 ° C., immobilization failure in the consolidation process, poor bonding between the woods, Material deterioration such as surface carbonization and lowering of material strength can be prevented. In addition, when the heating temperature is in the range of 110 ° C. to 170 ° C., it is also suitable for joining to Lauan thin plate, China thin plate, conifer thin plate and the like.

In the production of the laminated plywood according to the present embodiment, the predetermined compression pressure in the compression process of step S35 is in the range of 1 to 100 kg / cm ² , so that immobilization failure or poor connection between woods is caused in the consolidation process. Moreover, generation | occurrence | production of a surface crack can be prevented. It was confirmed that there was no problem in joining with Lauan sheet, China sheet, conifer sheet.

In the production of the laminated plywood according to the present embodiment, the time required for the heating process in step S34 and the compression process in step S35 is in the range of 10 minutes to 120 minutes. Bonding failure and carbonization of the surface can be prevented. It has been confirmed through experiments by the inventors that there is no problem in joining with Lauan thin plate, China thin plate, coniferous thin plate and the like.

When the vascular bundle K of the oil palm stem WD is 1.2 mm in thickness, the compacted conduit L is about 0.8 to 0.9 mm, and the presence of parenchymal cells J excluding the vascular bundle K is 0.1 to Since it is about 0.2 mm, the mechanical strength in the compacted state is increased.
However, when the vascular bundle K is compressed at a pressure at which it is broken, the mechanical strength does not change, or the mechanical strength decreases, so the thickness of the compacted oil palm material W needs to be at least 1.0 mm. Become. For example, when the thickness of the compacted oil palm material W is 0.8 mm or less, the 0.4 mm vascular bundle K is safe, but the vascular bundle K of 1.2 mm may be slightly reduced in diameter. It can be destroyed. Therefore, if the thickness of the compacted oil palm material W is 1.0 mm or more, it is natural that the vascular bundle K is somewhat reduced in diameter, so that it is not broken or cut.
Thus, the thickness of the oil palm material W which carried out the consolidation process shall be 1.0 mm or more.

[Embodiment 5]
The laminated plywood PW of the fourth embodiment is formed by peeling a predetermined length of the oil palm trunk WD from the outer periphery with a rotary race while rotating it in the circumferential direction, and then compressing and processing it. A lauan thin plate L formed by peeling two or more oil palm materials W of 1 mm or more and a predetermined length of a lauan trunk LD, a china trunk or a coniferous tree in a circumferential direction while rotating it in a circumferential direction with a rotary race. In addition, one or more of a Chinese thin plate or a coniferous thin plate is arranged facing the oil palm material W, and they are integrally joined.
Accordingly, at least two or more compacted oil palm materials W and one or more of Lauan thin plate L, China thin plate, and softwood thin plate are arranged facing the oil palm material W, and they are joined together. Therefore, when the resin component and sugar component contained in the oil palm material W are insufficient, an adhesive is added to one or more joining objects of the Lauan thin plate L, the Chinese thin plate, and the coniferous thin plate. A desired laminated plywood PW is manufactured by bonding. Therefore, since the adhesive is used when the resin component and the sugar component contained in the oil palm material W are insufficient, the use of the formaldehyde-based adhesive that causes sick house syndrome is suppressed, A laminated plywood PW using the components it has is obtained.

Two or more oil palm materials W arranged facing the oil palm material W of the above embodiment and integrally joined, and one or more lauan thin plates L, China thin plates, or softwood thin plates are integrally joined. The laminated plywood PW is formed by using a resin component and a sugar component contained in the oil palm material W for joining, compressing and fixing them, and joining them integrally.
Therefore, two or more oil palm materials W and one or more of Lauan thin plate L, China thin plate, or softwood thin plate are used as laminated plywood PW, and are integrated using the resin component and sugar component contained in oil palm material W. Therefore, the use of a formaldehyde adhesive that causes sick house syndrome can be suppressed, and a laminated plywood PW using components inherently possessed by the oil palm trunk WD can be obtained.

In order to join two or more oil palm materials W that are arranged facing the oil palm material W of the above embodiment and are joined together, a resin component and a sugar component contained in the oil palm material W are used. Or, since the resin surface and the sugar component contained in the oil palm material W are added to the joint surface that is integrally joined to any two or more of the Chinese thin plate or the softwood thin plate, other adhesives are added. For joining one or more oil palm materials W, a resin component and a sugar component contained in the oil palm material W are used. Further, one or more of any one of Lauan thin plate L, China thin plate, or softwood thin plate are joined. Therefore, the use of a formaldehyde-based adhesive that causes sick house syndrome can be suppressed, and a laminated plywood PW that uses components inherently possessed by oil palm can be obtained.

The thin plate process is a process in which the oil palm trunk WD having the predetermined length according to the fourth embodiment is rotated in the circumferential direction, and is peeled off with a cutter CT from the outer periphery to a predetermined thickness by a rotary race to form the Lauan thin plate L and the oil palm material W. It can be. Moreover, the process of drying the lauan thin plate L and the oil palm material W may be the same process as the process of forming the lauan thin plate L and the oil palm material W, or may be a separate process, and this is the drying process. be able to.
And the process of laminating the dried lauan thin plate L and oil palm material W in a predetermined state as a plurality of pre-pressurized multilayer materials NW is usually used by laminating in units of 2 to 5 sheets, In principle, two or more sheets may be stacked, and this can be used as a stacking process.
In particular, by reducing the number of lauan thin plates L from the number of oil palm materials W, the use of formaldehyde-based adhesives that cause sick house syndrome is suppressed to ½ or less, at least compared to conventional laminated plywood. be able to.

As described above, the laminated plywood PW of the above-described embodiment is a plurality of sheets that are peeled with the blade CT from the outer periphery to the predetermined thickness by the rotary race while rotating the lauan thin plate L and the oil palm material W of the predetermined length in the circumferential direction. The thin plate process of step S10 and step S11 formed on the lauan thin plate L and the oil palm material W, the drying step of step S20 and step S21 for drying the thin plate W, the lauan thin plate L and the oil palm dried in the drying step A stacking step of step S30 for stacking a plurality of materials W in a predetermined state, and a heating step of step S34 for heating to raise the temperature of the laminated lauan thin plate L and oil palm material W after the stacking step; The lauan thin plate L and oil are added to the laminated lauan thin plate L and oil palm material W heated by the heating step. Compressing step S35 for compressing for a predetermined time by applying a compressive force in a direction perpendicular to the surface of the lauan thin plate L and the oil palm material W while restricting extending in parallel to the surface of the web material W; Then, after pressing for a predetermined time in the compression step, the fixing step of step S37 for lowering and fixing the temperature supplied in the heating step is provided.

Manufacture of the laminated plywood of the said embodiment can be generalized as embodiment of the manufacturing method of a laminated plywood as follows.
A thin plate process consisting of step S10 and a predetermined length of oil formed by peeling a predetermined length of the oil palm trunk WD from the outer periphery to a predetermined thickness with a blade CT with a cutter CT while rotating the oil palm trunk WD in the circumferential direction. A thin plate process comprising step S11 of forming a non-palm trunk, for example, a lauan stem LD, with a rotary lace to a predetermined thickness from the outer periphery with a cutter CT while rotating it in the circumferential direction to form a thin plate such as a lauan thin plate L. A thin plate process comprising: a drying step comprising steps S20 and S21 for drying other peeled thin plates such as the oil palm material W and lauan thin plate L formed in the thin plate step; and the oil palm dried in the drying step. A laminating process comprising step S30 of laminating a plurality of other stripped thin plates such as the material W and lauan thin plate L in a predetermined state; A heating process comprising step S34 for heating to raise the temperature of the other peeled thin plates such as the laminated oil palm material W and lauan thin plate L after the laminating step, and the laminated layer heated by the heating step. The positioning hole 18 or the frame body 20 restricts the other extended thin plate such as the oil palm thin plate and the lauan thin plate L from extending in the direction parallel to the surface of the other peeled thin plate such as the oil palm thin plate and the lauan thin plate L. While compressing for a predetermined time by applying a compressive force in a direction perpendicular to the surface of the other peeled thin plate such as the oil palm thin plate and the lauan thin plate L, and compressing for a predetermined time in the compression step The other peeled thin plates such as the oil palm material W and the lauan thin plate L are fixed by lowering the temperature supplied in the heating step. It can be a method for producing a laminated plywood having a fixing step.

Each side of the five lauan thin plates L1 and the oil palm materials W2,. The frame 20 or the positioning hole 18 for positioning the frame is a frame 20 or the positioning hole 18 for regulating a predetermined stacking surface, and regulates the top and bottom and the left and right of the surfaces of the plurality of thin plates W. Therefore, the thin plate W is prevented from extending in a direction perpendicular to the surface to which the compressive force is applied, and a thick portion and a thin portion are not generated depending on the position of the laminated plywood PW.

In the laminated plywood PW of the above-described embodiment, the lauan thin plate L1 and one thin plate W1 of the plurality of laminated oil palm materials W2, ..., W5 are used as the lauan thin plate L other than the oil palm material W, and the oil palm material The laminated plywood PW including the lauan thin plate L other than W is integrally joined. As described above, the laminated plywood PW formed by integrally joining the oil palm materials W2,..., W5 in the joining composition of the oil palm materials W2,. By arranging one oil palm material W1 of the thin plates W2,..., W5 as a Lauan thin plate L other than the oil palm material W on the exposed surface on one side, as shown in FIG. It is possible to join the oil palm materials W2,. Moreover, it can be set as the design which utilized the grain arrange | positioned in the exposed surface of those one sides. Accordingly, only one surface of the laminated plywood PW can be made of thin wood made of other materials. In particular, it is suitable for use as a decorative board.

In the laminating step of laminating a plurality of lauan thin plates L and oil palm materials W in a predetermined state in the above embodiment, one surface of the lauan thin plates L1 and oil palm materials W2,. 1 or 2 on both end surfaces is a lauan thin plate L made of wood other than oil palm materials W2,..., W5, and laminated plywood PW including thin plates other than oil palm materials W1,. Are integrally joined. Here, the oil palm material W can be 1 or more.
Of course, the wood other than the oil palm materials W1,..., W5 can be the Lauan thin plate L, or can be a Chinese thin plate or a coniferous thin plate instead of the Lauan thin plate L. Alternatively, one or a combination of the two can be used.
[Embodiment 6]

In the fifth embodiment, the lauan thin plate L made of wood other than the oil palm materials W2,..., W5 is used as the lauan thin plate L1 and the oil palm materials W2,. As explained in the examples, when practicing the present invention, the laminated plywood PW can be constituted only by the oil palm materials W1,..., W5.
Specifically, as shown in FIGS. 2 and 3, a laminated plywood PW is formed only with oil palm materials W1,..., W5, and laminated as shown in FIG. NW.

The set of the oil palm materials W1,..., W5 of this embodiment is a pre-pressurized multilayer material NW in which the oil palm material W is disposed also on the exposed surface. For the pre-pressing multilayer material NW consisting only of the oil palm materials W1,..., W5, the entire fiber direction is the same, or one or more of the multilayer thin plates are made of different fibers (vascular bundles K). ) Direction. That is, only the thin plate process of step S10 in which the oil palm trunk WD having a predetermined length is rotated in the circumferential direction thereof and peeled with the blade CUT to a predetermined thickness by a rotary race to form a plurality of oil palm materials W can be performed. .

In this embodiment, step S10 is a step comprising forming a plurality of oil palm members W by rotating the oil palm trunk WD having a predetermined length in the circumferential direction thereof by peeling with a cutter CT from the outer periphery to a predetermined thickness with a rotary race. The thin plate process, the drying step of step S20 for drying the oil palm material W formed in the thin plate step, and the stacking step of step S30 for stacking a plurality of oil palm materials W dried in the drying step in a predetermined state And the heating process of step S34 which heats to raise the temperature of the laminated oil palm material W after the laminating process, and the laminated oil palm material W heated by the heating process, the oil palm material With respect to the surface of the oil palm material W, while being restricted by the positioning hole 18 or the frame body 20 to extend in the direction parallel to the surface of W A step of compressing for a predetermined time by applying an angular compression force and a step of fixing the oil palm material W compressed for a predetermined time in the compression step by lowering the temperature supplied in the heating step. It can be set as the manufacturing method of the laminated plywood which comprises the fixing process of S37.

A frame for positioning each side of the five oil palm materials W2,..., W5 in the laminating step of step S30 for laminating the oil palm material W dried in the drying step of the above embodiment in a predetermined state. 20 or the positioning hole 18 is the frame 20 or the positioning hole 18 that regulates a predetermined loading surface, and regulates the top and bottom and the left and right of the surface of the plurality of oil palm materials W. Therefore, the oil palm material W is prevented from extending in a direction perpendicular to the surface to which the compressive force is applied, and a thick portion and a thin portion are not generated depending on the position of the laminated plywood PW.

In the laminated plywood PW of the above embodiment, the plurality of laminated oil palm materials W1,..., W5 are integrally joined as a laminated plywood PW made of the oil palm material W. In this way, the laminated plywood PW formed by integrally joining the oil palm materials W1,..., W5 in the joining composition of the oil palm materials W1,. .., W5 can be joined by the adhesive ability of oil palm materials W1,..., W5 as shown in FIG. Therefore, the laminated plywood PW is obtained.
In the laminating step of laminating a plurality of oil palm materials W of the above-described embodiment in a predetermined state, a plurality of laminated oil palm materials W1,..., W5 are integrally joined as a laminated plywood PW. It is. Here, the oil palm material W can be one or more.

According to the method for manufacturing laminated plywood of the present embodiment, a plurality of oil palm trunks WD are peeled with a cutter CUT from the outer periphery to a predetermined thickness with a rotary race while rotating a predetermined length of oil palm trunk WD in the circumferential direction in the thin plate process of step S10. A sheet of oil palm material W is formed. The oil palm material W formed in the thin plate process in step S10 is dried in the drying process in step S20, and a plurality of dried oil palm materials W are laminated in a predetermined state in the laminating process in step S30. While heating in the heating process of step S34 to increase the temperature of the palm material W and restricting the heated oil palm material W from extending in a direction parallel to the surface of the oil palm material W, the oil Applying a compressive force in a direction perpendicular to the surface of the palm material W and compressing it for a predetermined time in the compression process of step S35, and then heating the oil palm material W compressed in the compression process of steps S31 to S36 for a predetermined time Lower the temperature supplied in step 1 and fix it.

Therefore, since the oil palm trunk WD has no nodes and no annual rings, when the oil palm material W is created by peeling it off from the outer periphery with a rotary race, a uniform thin plate is obtained. As a result, from the oil palm material W, The resulting laminated plywood PW is homogeneous. Moreover, since the joining force is changed by the resin component and sugar component contained in the oil palm trunk WD itself depending on the applied temperature and compressive force, an arbitrary adhesive force can be obtained by controlling the applied temperature and compressive force. Then, the plurality of oil palm materials W are joined by a resin component and a sugar component contained in the oil palm trunk WD itself to form a laminated plywood PW, and other synthetic resins and synthetic rubbers are used as adhesives. Because it is not, it can be returned to nature and does not cause pollution problems. Furthermore, because of the compressive force when the oil palm trunk itself contains the resin component and the sugar component, the gap in the oil palm material W is almost eliminated, resulting in a dense structure, water resistance, and It is highly waterproof and insect-proof and has a long service life even when used as a building material. In addition, since the oil palm trunk WD has the ability to form an uneven surface opposite to the uneven surface, the joining here includes mechanical joining using the forming ability.

In this way, a predetermined length of the oil palm trunk WD is formed by peeling off to a predetermined thickness with a rotary race while rotating in the circumferential direction, and when one of them is consolidated, a plurality of sheets each having a thickness of 1 mm or more The oil palm material W can be compressed and fixed simultaneously and joined together. In particular, the temperature of the oil palm material W laminated after the lamination process of step S30 is heated to increase in the heating process, and the oil palm material W heated in the compression process of step S35 is added to the oil palm material W. Since it compresses for a predetermined period of time by applying a compressive force in a direction perpendicular to the surface of the oil palm material W while restricting extending in a direction parallel to the surface, the compression is applied in the step S35. The extension that the compression force escapes in the direction parallel to the surface of the oil palm material W is limited, the compression force of all the laminated oil palm materials W is effectively used, and the compression of all the oil palm materials W is performed. The rate can be made uniform, and there is no waste from a plurality of oil palm materials W during manufacture.
Therefore, the laminated plywood PW bonded with natural products using the resin component and sugar component contained in the oil palm material W is obtained, the loss of the material used is reduced, the cost is reduced, and the formaldehyde system causing sick house syndrome The use of the adhesive is suppressed, and the laminated plywood PW using the components that oil palm originally has is obtained.

Since the thin plate process of step S10 or step S11 of the manufacturing method of the laminated plywood of the present embodiment is such that the number of oil palm materials W is larger than the number of lauan thin plates L such as lawan other than oil palm, at least Compared to the conventional laminated plywood PW, the use of formaldehyde-based adhesive that causes sick house syndrome can be suppressed to ½ or less.

Since the laminating process of step S30 for laminating a plurality of oil palm materials W and lauan thin plates L in the method for manufacturing the laminated plywood of the present embodiment has the same fiber direction as each other, the fiber directions are mutually different. Because they are laminated in the same way, they are joined along the length direction of the original trunk, and the fibers softened in the consolidation process are easily entangled with other fibers adjacent in the lamination direction with the same fiber direction. It is fixed in the state. That is, the fibers are entangled with each other by the consolidation process, and the bonding strength is increased. Therefore, the mechanical strength is high, and a stable dimensional shape after consolidation is ensured. Furthermore, by laminating the fibers in the same fiber direction, the expansion rate and contraction rate at the joint surface can be made completely the same, and the dimensional shape stability is higher without applying stress. .

Since the laminating step of step S30 for laminating a plurality of oil palm materials W and lauan thin plates L of the method for producing the laminated plywood of the present embodiment is a direction in which the fiber directions are orthogonal to each other, Even if the expansion and contraction force is generated due to the change in the surrounding environmental conditions, the fibers interact with each other to prevent warping deformation in a specific direction, a good balance state, and improved dimensional shape stability.

Since the drying step of step S20 or step S21 of the method for manufacturing the laminated plywood of the present embodiment is to dry the moisture content of the oil palm material W within a range of 5% to 30%, cracks, deformations, and swellings are caused. , Rupture and the like are prevented. Therefore, more stable dimensional shape is ensured and the yield is high. Further, when the moisture content is in a dry state within the range of 10% to 30%, it is also suitable for joining with a Lauan thin plate, a Chinese thin plate, a conifer thin plate, or the like.

Since the heating temperature in the heating process of step S34 of the method for manufacturing the laminated plywood according to the present embodiment is within the range of 110 ° C. to 170 ° C., improper fixing in the consolidation process, poor bonding between the woods, Further, it is possible to prevent material deterioration such as surface carbonization and reduction of material strength. In addition, when the heating temperature is in the range of 110 ° C. to 170 ° C., it is also suitable for joining to Lauan thin plate, China thin plate, conifer thin plate and the like.

Since the predetermined compression pressure in the compression step of step S35 of the method for manufacturing the laminated plywood according to the present embodiment is in the range of 1 to 100 kg / cm ² , immobilization failure in the consolidation process and joining between woods Defects and generation of surface cracks can be prevented. It was confirmed that there was no problem in joining with Lauan sheet, China sheet, conifer sheet.

The time required for the heating process in step S34 and the compression process in step S35 of the method for manufacturing the laminated plywood of the present embodiment is in the range of 10 minutes to 120 minutes. Bonding failure and carbonization of the surface can be prevented. It has been confirmed by the inventors' experiments that there is no problem in joining with Lauan thin plate, China thin plate, coniferous thin plate and the like.
In addition, the composition which contributes to the consolidation of the oil palm material W of this Embodiment is resin components, such as lignin, and saccharide components, such as a cellulose and hemicellulose, which the oil palm material W produced from the oil palm trunk WD of predetermined length has. It is what. The inventors' analysis recognizes that the main component is a resin component such as lignin and a saccharide component such as cellulose and hemicellulose. However, if the analytical ability is improved, the involvement of other components cannot be denied. Even if it is small, it cannot be denied that there may be other components that contribute to consolidation.

Claims

The oil palm material formed by peeling the trunk of a predetermined length of oil palm to the predetermined thickness while rotating in the circumferential direction, or the predetermined width, thickness, and length from the trunk of the oil palm of the predetermined length are cut by sawing In the oil palm material that
A plurality of the oil palm materials are compressed under high temperature, cooled and decompressed, and the thickness of each thin plate of the oil palm materials after the compaction processing is set to a thickness of 1 mm or more. An oil palm compacted material fixed by a resin component and a sugar component contained therein.
A thin oil palm material is formed by peeling a trunk of a predetermined length of oil palm in a circumferential direction while rotating the trunk of the oil palm to a predetermined thickness, and the oil palm material is dried, a predetermined number of layers are laminated, and the oil palm material In the joining composition of the oil palm material that contributes to the joining as a laminated plywood when the laminated thin plate is compressed by applying a compressive force in a direction perpendicular to the surface of the thin plate,
The joining composition that contributes to the joining of the oil palm material as a single body has the surface of the oil palm material peeled to a predetermined thickness as a joining surface having an adhesive function, and controls the temperature and compressive force of the plurality of thin plates. An oil palm material joining composition comprising the plurality of thin plates as a resin component and a sugar component contained in the oil palm itself.
A thin oil palm material is formed by peeling a trunk of a predetermined length of oil palm in a circumferential direction while rotating the trunk of the oil palm to a predetermined thickness, and the oil palm material is dried, a predetermined number of layers are laminated, and the oil palm material In the joining composition of the oil palm material that contributes to the joining as a laminated plywood when the laminated thin plate is compressed by applying a compressive force in a direction perpendicular to the surface of the thin plate,
The joining composition that contributes to joining the oil palm material integrally includes a resin component that the oil palm itself contains the plurality of oil palm materials by controlling the temperature and compression force of the plurality of oil palm materials, and A joining composition of oil palm material, characterized by being a sugar component.
The laminated plywood formed by integrally joining the oil palm material is a thin plate made of wood other than oil palm, and the laminated plywood includes a thin plate made of wood other than oil palm. The oil palm material bonding composition according to claim 2 or 3, wherein the oil palm material bonding composition is integrally bonded to the oil palm material.
A thin plate step of forming a plurality of thin plates by peeling the trunk of a predetermined length of oil palm in the circumferential direction while peeling it to a predetermined thickness from the outer periphery,
A thin plate drying step of drying the thin plate;
A laminating step of laminating a plurality of the thin plates dried in the thin plate drying step in a predetermined state;
A heating step of heating to raise the temperature of the laminated thin plates after the lamination step;
A pressing step of applying a compressive force in a direction perpendicular to the surface of the thin plate to the laminated thin plates heated by the heating step;
And a fixing step of lowering the temperature supplied in the heating step after pressing for a predetermined time in the pressing step.
6. The laminating step of laminating the thin plates dried in the thin plate drying step in a predetermined state regulates the upper and lower sides and the left and right sides of the thin plate with a frame body that regulates a predetermined stacking surface. The method for joining the oil palm materials as described.
In the laminating step of laminating a plurality of the thin plates in a predetermined state, one of the laminated thin plates is a thin plate made of wood other than oil palm and includes the thin plate made of wood other than oil palm. The oil palm material joining method according to claim 5, wherein the oil palm material is joined integrally to the oil palm material.
A plurality of oil palm members each having a thickness of 1 mm or more after forming a trunk of a predetermined length of oil palm to a predetermined thickness in the circumferential direction and then compacting it,
Lauan plate of a predetermined length or Sina or coniferous tree, and one or more of Lauan plate, Sina plate, coniferous tree formed by peeling the trunk in the circumferential direction to face the oil palm material, A laminated plywood characterized by being consolidated and integrally joined.
A plurality of oil palm members each having a thickness of 1 mm or more after forming a trunk of a predetermined length of oil palm to a predetermined thickness in the circumferential direction and then compacting it,
One or more of lauan plate, china plate, or coniferous plate formed by peeling a predetermined length of lauan or china or conifer tree trunk from the outer periphery to a predetermined thickness while rotating in the circumferential direction faces the oil palm material. The laminated plywood is characterized by being arranged, consolidated, and joined together.
A plurality of oil palm members each having a thickness of 1 mm or more after forming a trunk of a predetermined length of oil palm to a predetermined thickness in the circumferential direction and then compacting it,
One or more of lauan, china, and conifers formed in a plate shape in the length direction of the trunk of a predetermined length are arranged facing the oil palm material, compressed, fixed, and joined together. Laminated plywood.
A plurality of oil palm materials that face the oil palm material and are integrally joined together, and a laminated plywood that is integrally joined with one or more of a lauan board, a sina board, or a softwood board, The laminated plywood according to claim 8, wherein a resin component and a sugar component contained in the oil palm material are used, compressed, fixed, and integrally joined.
A step of peeling a predetermined length of oil palm trunk to a predetermined thickness in the circumferential direction to form a plurality of thin oil palm materials, and peeling a trunk other than the predetermined length of oil palm to a predetermined thickness in the circumferential direction 1 A thin plate process comprising a step of forming a sheet of more than one sheet;
A drying step of drying the oil palm material formed in the thin plate step and other stripped thin plates;
A laminating step of laminating a plurality of oil palm materials dried in the drying step and other stripped thin plates in a predetermined state;
A heating step of heating to raise the temperature of the laminated oil palm material and other stripped thin plates after the laminating step;
The oil palm material is controlled to extend in a direction parallel to the surfaces of the oil palm material and other stripped thin plates to the laminated oil palm material and other stripped thin plates heated by the heating step. And a compression step of compressing for a predetermined time by applying a compressive force in a direction perpendicular to the surface of the other stripped thin plate;
A fixing step of fixing the oil palm material and other stripped thin plates compressed in the compression step for a predetermined time by lowering the temperature supplied in the heating step. Production method.
A thin plate step of peeling a predetermined length of oil palm trunk to a predetermined thickness in the circumferential direction with a blade to form a plurality of thin oil palm materials;
A drying step of drying the oil palm material formed in the thin plate step;
A laminating step of laminating a plurality of oil palm materials dried in the drying step in a predetermined state;
A heating step for heating to raise the temperature of the laminated oil palm material after the lamination step;
A compression force in a direction perpendicular to the surface of the oil palm material is applied to the laminated oil palm material heated by the heating step while restricting the oil palm material from extending in a direction parallel to the surface of the oil palm thin plate. A compression process for compressing for a predetermined time,
A method for producing a laminated plywood comprising: an immobilizing step of fixing the oil palm material compressed in the compressing step for a predetermined time by lowering the temperature supplied in the heating step.
The method for producing a laminated plywood according to claim 12 or 13, wherein in the thin plate step, the number of oil palm materials is made larger than the number of stripped thin plates other than oil palm.