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US20140037892A1 - Method for producing an artificial wood and artificial wood product - Google Patents

Method for producing an artificial wood and artificial wood product Download PDF

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Publication number
US20140037892A1
US20140037892A1 US14/046,155 US201314046155A US2014037892A1 US 20140037892 A1 US20140037892 A1 US 20140037892A1 US 201314046155 A US201314046155 A US 201314046155A US 2014037892 A1 US2014037892 A1 US 2014037892A1
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United States
Prior art keywords
fibre
bonding agent
wood product
product
artificial wood
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
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US14/046,155
Inventor
Yong Leong Chang
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Individual
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Individual
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Application filed by Individual filed Critical Individual
Priority to US14/046,155 priority Critical patent/US20140037892A1/en
Publication of US20140037892A1 publication Critical patent/US20140037892A1/en
Abandoned legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B32B5/12—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer characterised by the relative arrangement of fibres or filaments of different layers, e.g. the fibres or filaments being parallel or perpendicular to each other
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B21/00—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B21/00—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board
    • B32B21/02—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board the layer being formed of fibres, chips, or particles, e.g. MDF, HDF, OSB, chipboard, particle board, hardboard
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/02—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by features of form at particular places, e.g. in edge regions
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/14—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
    • B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
    • B32B5/26—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
    • B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
    • B32B5/28—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer impregnated with or embedded in a plastic substance
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00—Layers arrangement
    • B32B2250/20—All layers being fibrous or filamentary
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2260/00—Layered product comprising an impregnated, embedded, or bonded layer wherein the layer comprises an impregnation, embedding, or binder material
    • B32B2260/02—Composition of the impregnated, bonded or embedded layer
    • B32B2260/021—Fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/06—Vegetal fibres
    • B32B2262/062—Cellulose fibres, e.g. cotton
    • B32B2262/065—Lignocellulosic fibres, e.g. jute, sisal, hemp, flax, bamboo
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/06—Vegetal fibres
    • B32B2262/062—Cellulose fibres, e.g. cotton
    • B32B2262/067—Wood fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/20—Properties of the layers or laminate having particular electrical or magnetic properties, e.g. piezoelectric
    • B32B2307/202—Conductive
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/40—Properties of the layers or laminate having particular optical properties
    • B32B2307/402—Coloured
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/40—Properties of the layers or laminate having particular optical properties
    • B32B2307/41—Opaque
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
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    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/54—Yield strength; Tensile strength
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/546—Flexural strength; Flexion stiffness
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/714—Inert, i.e. inert to chemical degradation, corrosion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/718—Weight, e.g. weight per square meter
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/732—Dimensional properties
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/10—Methods of surface bonding and/or assembly therefor
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24132—Structurally defined web or sheet [e.g., overall dimension, etc.] including grain, strips, or filamentary elements in different layers or components parallel
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24355—Continuous and nonuniform or irregular surface on layer or component [e.g., roofing, etc.]
    • Y10T428/24438—Artificial wood or leather grain surface

Definitions

  • the invention relates to a method for producing an artificial wood product from fibres and bonding agent and. to an artificial wood product comprising fibres and bonding agent.
  • the objective of the invention is to eliminate the drawbacks referred to above.
  • One specific objective of the invention is to disclose a new kind of method and a product which allows a production of an artificial wood having an outer appearance just like a natural wood.
  • a further objective of the invention is to disclose an artificial wood which can be handled, such as sawn, planed smooth and sanded down just like a natural wood.
  • Still a further objective of the invention is to give us people better possibilities to stop or at least to decrease tropical deforestation.
  • the method in accordance with the invention for producing an artificial wood product from fibres and bonding agent comprises the steps: several fibres are aligned longitudinally to form a strand wire; several said strand wires are bonded with said bonding agent unidirectionally and side by side together to form a fibre sheet; and several said fibre sheets are stacked and bonded with said bonding agent one upon the other in layers to form an elongated wood product in which said sheets replicate the pattern of annular growth rings of a natural wood.
  • fibres are bonded together in a strand wire with said bonding agent.
  • the thickness of a strand is about 20-100 microns, the width 500-2000 mm and the length can be even from meters to hundreds of meters handled in rolls. For instance if the length of the wood is going to be 6 meters, the strands should be cut at 6 meters length from the roll.
  • said sheets are stacked together unidirectionally to form said elongated wood product. It is also possible in certain embodiments of the invention to stack these sheets together with variable directions of the fibres in different sheets depending on the desired outer appearance of the final product.
  • said sheets are stacked together to form said elongated wood product with a rectangular; square, half-round or round cross-section.
  • the cross-section and the outer surface of the product can resemble a natural wood trunk. So in the inventive method it is possible to make final or semi-final product, the outer appearance of which can be almost anything depending on the usage of the product. Also it is possible to use a certain form of a mould to create a certain form of an elongated product.
  • the thickness of said sheets are adjusted in different layers to replicate the variation of the thickness of annular growth rings of a natural wood. So the number of strand wires in different sheets can vary depending on the desired thickness of a certain sheet, ie. the desired thickness of a certain annular growth ring.
  • the colour of said sheets are adjusted in different layers to replicate the variation of the colour of annular growth rings of a natural wood. So it is possible to stain different fibres separately, different strand wires separately or different sheets separately. Also it is possible to stain said bonding agent. So any kind of pigment can be used alone or separately in different components of the product so that a desired outer appearance of the product can be received.
  • said elongated wood product is handled just like a natural wood trunk. So it can be sawn into a lumber, board, plank or balk of smaller cross-sections. Also the surface of said wood product or already sawn smaller peace can be planed and/or sanded down.
  • the artificial wood product in accordance with the invention comprises strand wires made of longitudinally aligned fibres.
  • said strand wires are bonded with said bonding agent unidirectionally and side by side together to form a fibre sheets. Further more several of said fibre sheets are stacked and bonded with said bonding agent one upon the other in layers to form an artificial wood product in which said sheets replicate the pattern of annular growth rings of a natural wood.
  • said fibre can be almost any natural or artificial fibre and advantageously said fibre is jute fibre, hem fibre, palm tree fibre, coconut fibre or bamboo fibre.
  • said bonding agent is polyester resin.
  • polyester resin is the most cost-effective bonding agent but it is possible to use also other agents instead of polyester resin. So the invention has not been restricted only to polyester resin.
  • said stacked and bonded fibre sheets are advantageously unidirectionally one upon the other.
  • stacked sheets are not unidirectional so that the main directions of at least some of the aligned sheets are in an angle with respect to each other.
  • the method and the artificial wood product in accordance with the present invention have considerable advantages compared with prior art.
  • it is possible to produce lumber, boards, planks or balks which resemble almost completely corresponding natural products.
  • At a distance of a couple of meters it is almost impossible to distinguish said inventive artificial wood product from a real natural wood product.
  • the demand for tropical natural wood in the international markets can be decreased remarkably. So the invention creates good possibilities to save tropical forests and to stop the tropical deforestation.
  • FIG. 1 represents a single fibre
  • FIG. 2 represents a strand wire
  • FIG. 3 represents an embodiment of the invention
  • FIG. 4 represents another embodiment of the invention.
  • FIG. 1 represents one single fibre 1 , natural or artificial, that can be used in the invention.
  • the cross section of the fibre is more or less round and the diameter of the fibre can be from 20 ⁇ m to some mm.
  • the length of the fibre can be even hundreds of meters if needed.
  • FIG. 2 describes the structure of a strand wire 2 . Every strand of fibre and the sheet of fibres, ie. strand wires are pre-impregnated with a bonding agent. In a strand wire 2 several fibres 1 have been bonded adjacently together with a bonding agent. So the fibres form with a bonding agent a flat and thin sheet, the length of which is unlimited and can vary depending on the final products.
  • FIG. 3 describes one embodiment of the invention.
  • the artificial wood product of FIG. 3 is a square beam made of several strand wires 2 bonded together one upon the other with polyester resin or similar other bonding agent.
  • the product has been made from strand wires of different colour so that every fourth layer 3 of the structure is darker than the other three layers 4 or strand wires.
  • Three lighter strand wires together with one darker strand wire describe one annular growth ring of tree growth.
  • all the fibres are not necessarily of the same colour. It is possible that some of the fibres in the same strand wire are darker than the other fibres so that the structure resembles more a natural wood.
  • Different additives may also act as an important role to imitate annular wood growth pattern as the use of additives control the imitation of porosities of each layer, thus representing different seasons of wood growth. High density and often darker layers represent dry seasons of tree growth.
  • FIG. 4 describes another embodiment of the invention.
  • the artificial wood product of FIG. 4 has been made in the same way as the product of FIG. 3 . Only the layers, ie. strand wires are round and stacked one upon the other so that. the final. product is a round artificial log.
  • This wood looking log can be used as such in different solutions just like natural logs or it can be sawn to sectors 5 as shown in the figure or to any size square timber.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Chemical And Physical Treatments For Wood And The Like (AREA)
  • Dry Formation Of Fiberboard And The Like (AREA)

Abstract

The invention relates to a method for producing an artificial wood product from fibres and bonding agent and to an artificial wood product comprising fibres and bonding agent. The objective of the invention is to disclose a new kind of method and a product which allows a production of an artificial wood having an outer appearance just like a natural wood.
In the method several fibres are aligned longitudinally to form a strand wire, several said strand wires are bonded with said bonding agent unidirectionally and side by side together to form a fibre sheet, and several said fibre sheets are stacked and bonded with said bonding agent one upon the other in layers to form an elongated wood .product in which said sheets replicate the pattern of annular growth rings of a natural wood.

Description

    FIELD OF THE INVENTION
  • The invention relates to a method for producing an artificial wood product from fibres and bonding agent and. to an artificial wood product comprising fibres and bonding agent.
    • BACKGROUND OF THE INVENTION
  • The growing demand for natural wood and especially rare and beautiful tropical hardwood has led to tropical deforestation and so to serious environmental problems not only locally but also globally.
  • It has been previously known to make planks and boards from polymer wood fiber composite only by adding fiber into resin and then compressing said composite into a mould to form a desired shape of product. This kind of plastic fiber boards have quite a monotone and unnatural appearance. Although this kind of products can stand wet conditions and also high and low temperatures, they cannot substitute natural wood products in terms of appearance, application and processing.
    • OBJECTIVE OF THE INVENTION
  • The objective of the invention is to eliminate the drawbacks referred to above. One specific objective of the invention is to disclose a new kind of method and a product which allows a production of an artificial wood having an outer appearance just like a natural wood. A further objective of the invention is to disclose an artificial wood which can be handled, such as sawn, planed smooth and sanded down just like a natural wood. Still a further objective of the invention is to give us people better possibilities to stop or at least to decrease tropical deforestation.
    • SUMMARY OF THE INVENTION
  • The method in accordance with the invention for producing an artificial wood product from fibres and bonding agent comprises the steps: several fibres are aligned longitudinally to form a strand wire; several said strand wires are bonded with said bonding agent unidirectionally and side by side together to form a fibre sheet; and several said fibre sheets are stacked and bonded with said bonding agent one upon the other in layers to form an elongated wood product in which said sheets replicate the pattern of annular growth rings of a natural wood.
  • In an embodiment of the invention fibres are bonded together in a strand wire with said bonding agent. On the average the thickness of a strand is about 20-100 microns, the width 500-2000 mm and the length can be even from meters to hundreds of meters handled in rolls. For instance if the length of the wood is going to be 6 meters, the strands should be cut at 6 meters length from the roll.
  • In a further embodiment of the invention said sheets are stacked together unidirectionally to form said elongated wood product. It is also possible in certain embodiments of the invention to stack these sheets together with variable directions of the fibres in different sheets depending on the desired outer appearance of the final product.
  • In a further embodiment of the invention said sheets are stacked together to form said elongated wood product with a rectangular; square, half-round or round cross-section. Also the cross-section and the outer surface of the product can resemble a natural wood trunk. So in the inventive method it is possible to make final or semi-final product, the outer appearance of which can be almost anything depending on the usage of the product. Also it is possible to use a certain form of a mould to create a certain form of an elongated product.
  • In a further embodiment of the invention the thickness of said sheets are adjusted in different layers to replicate the variation of the thickness of annular growth rings of a natural wood. So the number of strand wires in different sheets can vary depending on the desired thickness of a certain sheet, ie. the desired thickness of a certain annular growth ring.
  • In a further embodiment of the invention the colour of said sheets are adjusted in different layers to replicate the variation of the colour of annular growth rings of a natural wood. So it is possible to stain different fibres separately, different strand wires separately or different sheets separately. Also it is possible to stain said bonding agent. So any kind of pigment can be used alone or separately in different components of the product so that a desired outer appearance of the product can be received.
  • In a further embodiment of the invention said elongated wood product is handled just like a natural wood trunk. So it can be sawn into a lumber, board, plank or balk of smaller cross-sections. Also the surface of said wood product or already sawn smaller peace can be planed and/or sanded down.
  • It is even possible to produce artificial trunks that can be rotary-cut into veneers having a thickness of only a couple of millimetres. These veneers can be glued with said bonding agent into thicker plywood.
  • Depending on the size and structure of the final product, it is possible to use a high pressure vacuum curing system to hold all the fibres in contact with each other until the bonding agent has hardened completely.
  • The artificial wood product in accordance with the invention comprises strand wires made of longitudinally aligned fibres. In the product said strand wires are bonded with said bonding agent unidirectionally and side by side together to form a fibre sheets. Further more several of said fibre sheets are stacked and bonded with said bonding agent one upon the other in layers to form an artificial wood product in which said sheets replicate the pattern of annular growth rings of a natural wood.
  • In the invention said fibre can be almost any natural or artificial fibre and advantageously said fibre is jute fibre, hem fibre, palm tree fibre, coconut fibre or bamboo fibre.
  • In the best embodiment of the invention said bonding agent is polyester resin. At this moment polyester resin is the most cost-effective bonding agent but it is possible to use also other agents instead of polyester resin. So the invention has not been restricted only to polyester resin.
  • Also it is possible to use in the inventive product, in its fibres, in its bonding agent or in both of them different additives to increase or to decrease certain physical or chemical properties or characteristics of the product. This kind of properties or characteristics can be for instance weight, colour, elasticity, stiffness, opacity, electrical conductivity, corrosion resistance etc.
  • In the inventive product said stacked and bonded fibre sheets are advantageously unidirectionally one upon the other. However it is also possible that stacked sheets are not unidirectional so that the main directions of at least some of the aligned sheets are in an angle with respect to each other.
  • The method and the artificial wood product in accordance with the present invention have considerable advantages compared with prior art. In accordance with the invention it is possible to produce lumber, boards, planks or balks which resemble almost completely corresponding natural products. At a distance of a couple of meters it is almost impossible to distinguish said inventive artificial wood product from a real natural wood product. With this new invention the demand for tropical natural wood in the international markets can be decreased remarkably. So the invention creates good possibilities to save tropical forests and to stop the tropical deforestation.
    • LIST OF FIGURES
  • In the following section, the invention will be described in detail with reference to the accompanying drawings, in which
  • FIG. 1 represents a single fibre,
  • FIG. 2 represents a strand wire,
  • FIG. 3 represents an embodiment of the invention and
  • FIG. 4 represents another embodiment of the invention.
    •  DETAILED DESCRIPTION OF THE INVENTION
  • FIG. 1 represents one single fibre 1, natural or artificial, that can be used in the invention. Normally the cross section of the fibre is more or less round and the diameter of the fibre can be from 20 μm to some mm. The length of the fibre can be even hundreds of meters if needed.
  • FIG. 2 describes the structure of a strand wire 2. Every strand of fibre and the sheet of fibres, ie. strand wires are pre-impregnated with a bonding agent. In a strand wire 2 several fibres 1 have been bonded adjacently together with a bonding agent. So the fibres form with a bonding agent a flat and thin sheet, the length of which is unlimited and can vary depending on the final products.
  • FIG. 3 describes one embodiment of the invention. The artificial wood product of FIG. 3 is a square beam made of several strand wires 2 bonded together one upon the other with polyester resin or similar other bonding agent. The product has been made from strand wires of different colour so that every fourth layer 3 of the structure is darker than the other three layers 4 or strand wires. Three lighter strand wires together with one darker strand wire describe one annular growth ring of tree growth.
  • As can be seen from those light three layers, all the fibres are not necessarily of the same colour. It is possible that some of the fibres in the same strand wire are darker than the other fibres so that the structure resembles more a natural wood. Different additives may also act as an important role to imitate annular wood growth pattern as the use of additives control the imitation of porosities of each layer, thus representing different seasons of wood growth. High density and often darker layers represent dry seasons of tree growth.
  • FIG. 4 describes another embodiment of the invention. The artificial wood product of FIG. 4 has been made in the same way as the product of FIG. 3. Only the layers, ie. strand wires are round and stacked one upon the other so that. the final. product is a round artificial log. This wood looking log can be used as such in different solutions just like natural logs or it can be sawn to sectors 5 as shown in the figure or to any size square timber.
  • The invention is not limited merely to the examples referred to above; instead many variations are possible within the scope of the inventive idea defined by the claims.

Claims (7)

1-12. (canceled)
13. Artificial wood product comprising fibres and bonding agent, characterized in that said wood product comprises strand wires made of longitudinally aligned fibres, said strand wires being bonded with said bonding agent unidirectionally and side by side together to form a fibre sheets and several of said fibre sheets being stacked and bonded with said bonding agent one upon the Other in layers to form an artificial wood product in which said sheets replicate the pattern of annular growth rings of a natural wood.
14. Artificial wood product according to claim 13, characterized in that said fibre is jute fibre, hem fibre, palm tree fibre, coconut fibre or bamboo fibre.
15. Artificial wood product according to claim 13, characterized in that said bonding agent is polyester resin.
16. Artificial wood product according to claim 13, characterized in that said wood product comprises additives to increase or to decrease the weight of the product.
17. Artificial wood product according to claim 13, characterized in that the fibres or the bonding agent of said wood product or a part of said wood product comprises pigment.
18. Artificial wood product according to claim 13, characterized in that said stacked and bonded fibre sheets are unidirectionally one upon the other.
US14/046,155 2010-03-25 2013-10-04 Method for producing an artificial wood and artificial wood product Abandoned US20140037892A1 (en)

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EP2550161A1 (en) 2013-01-30

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