JP2022188446A - Manufacturing method and manufacturing apparatus for resin composite material - Google Patents

Abstract

An object of the present invention is to provide a resin composite material manufacturing apparatus and a manufacturing method capable of stabilizing the raw material supply amount and improving the manufacturing efficiency of the resin composite material. SOLUTION: A raw material supply unit 11 for supplying a thermoplastic resin and a woody biomass roasted product, a first cylinder 12, a first degassing unit 13 provided in the first cylinder 12, and an extrusion molding and a rotary drive mechanism 15 for driving the first screw. An apparatus 10 for manufacturing a resin composite material that can be removed. [Selection drawing] Fig. 1

Description

TECHNICAL FIELD The present invention relates to a method and apparatus for producing a resin composite material, and more particularly to a method and apparatus for producing a woody biomass/thermoplastic resin composite material by extrusion molding.

Biomass materials are attracting attention as industrial resources. Biomass materials mean materials derived from organisms such as plants. Since biomass materials are organic substances, carbon dioxide is emitted when they are burned. However, the carbon contained in this is derived from the carbon dioxide absorbed from the atmosphere by photosynthesis during the biomass growth process, so the use of biomass materials does not increase the amount of carbon dioxide in the atmosphere as a whole. It is said that it is good to think. This property is called carbon neutral.

Against the backdrop of global environmental problems such as global warming, there is an urgent need to promote resource conservation, material recycling aimed at turning waste into raw materials, and environmental recycling cycles represented by biodegradable plastics. However, the revised Recycling Law and the Green Purchasing Law have been established, and the need for products that comply with these laws is increasing.

Under these circumstances, blending biomass materials into resin molded products, which are widely used from materials for automobile parts to daily necessities, promotes the practice of the concept of carbon neutrality.

Under such circumstances, the present inventors have found that heat We have found that it is possible to provide a molding material that is uniformly mixed with a plastic resin and that can be produced at low cost.

This woody biomass-containing molding material is pelletized by an extruder often used for molding thermoplastic resin compositions (see, for example, Patent Document 1) to obtain a resin composite material.

Japanese Patent Application Laid-Open No. 2020-128032

By the way, when trying to produce a resin composite material with an extruder, the woody biomass roasted product adheres to the shooter of the raw material supply unit, or forms lumps at the inlet of the raw material supply unit, reducing the amount of raw material supplied. Sometimes it became unstable. If the amount of raw material supplied becomes unstable, the production amount (extrusion amount) of the resin composite material per unit time decreases, and efficient production becomes impossible.

Therefore, it is desired to provide an apparatus and a method for producing a resin composite material, which can stabilize the raw material supply amount and improve the production efficiency of the resin composite material.

In the method for producing a resin composite material disclosed in the present application, in extrusion molding using a resin composite material containing a roasted woody biomass, a thermoplastic resin and a roasted woody biomass are kneaded to form a kneaded product. At the time, volatile gas generated from the kneaded material is degassed from the first cylinder to the outside.

The apparatus for producing a resin composite material disclosed in the present application has a first degassing section in the first cylinder for degassing the volatile gas generated from the kneaded material to the outside.

According to the resin composite material manufacturing method and manufacturing apparatus disclosed in the present application, a resin composite material containing a thermoplastic resin and a roasted woody biomass can be efficiently manufactured. In particular, it is possible to stabilize the feed rate of raw materials and increase the extrusion rate.

1 is a side view showing a schematic configuration of an apparatus for manufacturing a resin composite material according to Embodiment 1. FIG. FIG. 2 is a schematic diagram showing the configuration of a degassing cylinder capable of suction degassing as one configuration example of the degassing unit in FIG. 1 ; FIG. 10 is a side view showing the configuration of a manufacturing apparatus for a resin composite material according to Embodiment 2; 34B is a top view showing the configuration of the apparatus for manufacturing the resin composite material of FIG. 34A. FIG. FIG. 11 is a side view showing a schematic configuration of a manufacturing apparatus for a resin composite material according to Embodiment 3; 5 is a diagram showing a schematic configuration of a suction degassing device as one configuration example of the degassing unit of FIG. 4. FIG. It is a partially enlarged view of the die. FIG. 3 is a side view showing the configuration of a resin composite material manufacturing apparatus used in a comparative example.

Hereinafter, embodiments will be described in detail based on examples and drawings. In all the drawings for describing the embodiments, members having the same function are denoted by the same or related reference numerals, and repeated description thereof will be omitted.

(Embodiment 1)
<Production equipment for resin composite materials>
FIG. 1 is a diagram showing a configuration example of a manufacturing apparatus for a resin composite material according to the present embodiment. FIG. 2 is a schematic diagram showing the configuration of a degassing cylinder capable of suction degassing as the volatile gas degassing section (first degassing section) shown in FIG.

The production apparatus 10 for a resin composite material shown in FIG. 1 is an extrusion apparatus suitable for producing a resin composite material containing roasted woody biomass and a thermoplastic resin. It is used as a pretreatment device for production to produce pellets as a raw material.

This resin composite material manufacturing apparatus 10 includes a raw material supply unit 11, a cylinder 12 having a screw, a volatile gas degassing unit 13 provided upstream of the cylinder 12, a die 14, and a screw of the cylinder 12. and a rotation drive mechanism 15 that drives the

The raw material supply unit 11 supplies the raw material of the resin composite material to the cylinder 12 . In the present embodiment, as raw materials, a thermoplastic resin and a roasted woody biomass are fed from above into the shooter 11a of the raw material supply unit 11 by a feeder or the like, and the raw materials are mixed and supplied to the cylinder 12. be done. The raw materials used here will be described later in detail.

Cylinder 12 has a screw inside. A kneaded material obtained by kneading raw materials is conveyed through the cylinder 12 by rotating the screw. A twin-screw extruder can be configured by using a twin-screw having two screws as the screw. The twin-screw extruder has the flexibility to freely change operating conditions such as screw rotation speed and barrel set temperature, and has various advantages such as high kneadability and continuous productivity.

The cylinder 12 is formed, for example, by connecting a plurality of cylinder blocks, and each cylinder block is provided with a space capable of conveying a kneaded product of thermoplastic resin and roasted woody biomass. A screw is provided in this space, and the screw is connected to the rotation drive mechanism 15 . The rotary driving mechanism 15 rotates the screw to convey the kneaded material in the cylinder 12 .

Also, the cylinder 12 is provided with a heater (not shown) so that its temperature can be adjusted. This heater melts the raw material thermoplastic resin to easily obtain a kneaded product of the thermoplastic resin and the roasted woody biomass. Further, the kneaded material obtained in this way can be easily conveyed inside the cylinder 12 . At this time, it is preferable to control the temperature so as not to excessively increase the temperature of the kneaded material.

The volatile gas degassing section 13 mainly has a function of removing the volatile gas generated from the resin composite material to the outside of the cylinder 12 , and is provided upstream of the cylinder 12 , for example. The volatile gas degassing unit 13 may have an opening (degassing port) on the side or top surface of the cylinder 12 . gas can be removed to the outside.

Furthermore, in order to efficiently remove the volatile gas, a degassing device capable of vacuum suction may be used as the degassing unit 13 . By having such a degassing device, the volatile gas generated within the cylinder 12 can be removed more efficiently.

Here, the upstream side of the cylinder 12 means the upstream side (closer to the raw material supply section 11) in the flow direction of the kneaded material that is kneaded and conveyed inside the cylinder 12 . Further, the upstream side in the present embodiment means the position of the cylinder 12 from the raw material supply portion 11 to the position where the thermoplastic resin is melted and plasticized. The position where the degassing section 13 is provided is preferably within 70% of the total length of the screw from the raw material supply section 11, more preferably within 40% of the total length of the screw from the raw material supply section 11. immediately after the raw material supply section 11) is particularly preferable. Further, the number of degassing units 13 provided is not particularly limited to one.

The position where the thermoplastic resin is melted and plasticized means a region where the cylinder temperature is the melting start temperature or higher in the case of a crystalline resin, or the glass transition temperature or higher in the case of an amorphous resin, more preferably. In the case of a crystalline resin, the cylinder temperature is above the melting temperature (melting point), and in the case of an amorphous resin, it is above the glass transition temperature. Here, the melting start temperature/melting temperature (melting point) of the crystalline resin can be obtained by using, for example, a differential scanning calorimeter (DSC, PerkinElmer DSC8500). In the DSC curve, the temperature corresponding to the point where the baseline before the peak due to the melting of the crystalline resin touches the tangent line of the inflection point on the left side of the melting peak is the melting start point, and the temperature at which the melting peak appears is the melting point. is.

The die 14 is a member for extruding and molding the kneaded material conveyed inside the cylinder 12, and has holes for extrusion molding. The shape of the holes provided in the die 14 determines the shape to be molded. At this time, the shape of the holes can be various shapes depending on the shape of the resin composite material to be manufactured, and a suitable shape may be selected. For example, when molding into a strand shape, a plurality of circular holes are provided, and when molding into a sheet shape, slit-shaped holes are provided.

The rotation drive mechanism 15 is a device for rotating the screw provided inside the cylinder 12 . The raw material is conveyed inside the cylinder 12 by the screw rotated by the rotary drive mechanism 15 .

The degassing cylinder 130 shown in FIG. 2, which will be described below, exemplifies a degassing cylinder used when two screws are provided in the cylinder 12. It may be a twin-screw extruder provided with or a single-screw extruder provided with one screw.

When this composite resin material manufacturing apparatus is a twin-screw extruder, the two screws are arranged so as to mesh with each other and rotate. When the number of screws is two, the space volume can be increased. Therefore, when the screw diameter is the same, the twin-screw machine with two screws can produce a higher extrusion rate than the single-screw machine with one screw. preferable. The extending direction of the cylinder 12 and the extending direction of the screw inside the cylinder 12 are the same.

<Regarding the volatile gas deaerator>
In the present embodiment, the volatile gas degassing section 13 may have an opening through which the volatile gas generated in the cylinder 12 can be removed to the outside, as described above. Further, if the degassing unit 13 is composed of a degassing cylinder capable of suction degassing, volatile gas can be efficiently removed, which is preferable.

As an example of the degassing cylinder, a configuration example thereof is shown in FIG. This degassing cylinder 130 is provided as a part of the cylinder 12 at a connecting portion with the raw material supply section 11 . The degassing cylinder 130 is provided so that the internal space communicates from the raw material supply unit 11 to the cylinder 12, and the thermoplastic resin and the roasted woody biomass, which are raw materials, can flow. A screw is arranged in this communicating space. The degassing cylinder 130 is provided with a degassing port so that the volatile gas generated inside the cylinder 12 can be discharged to the outside.

The degassing cylinder 130 shown here is provided with a screen 131 as its degassing port that allows volatile gas to pass through while preventing the supplied solid matter (raw material) from passing through. there is By providing this screen 131, the volatile gas to be removed can be removed from the cylinder 12 to the outside without leaking the raw material to the outside.

Furthermore, in this degassing cylinder 130, a suction port 132 provided in the degassing cylinder 130 is connected to a suction device such as a vacuum pump so that volatile gases can be efficiently degassed from the degassing port (screen 131). is preferably connected to FIG. 2 illustrates a case in which four suction ports 132 are provided.

In addition, although the case where one degassing unit 13 is provided in the above-described embodiment is described as an example, two or more degassing units 13 may be provided. Even when two or more are provided, the installation positions are all provided on the upstream side of the cylinder 12 .

<Raw materials for resin composite materials>
Next, raw materials used in the method for producing a resin composite material according to the present embodiment will be described. The raw materials used here include thermoplastic resins and roasted woody biomass.

Any resin can be used as the thermoplastic resin as long as it can be plasticized and molded by heat. Examples of the thermoplastic resin include polyethylene, polypropylene, polyamide, polyethylene terephthalate, polyimide, polyetheretherketone, etc. Among them, low-density polyethylene and polypropylene, which easily maintain the temperature of the kneaded product, are moldable. preferable from this point of view.

Moreover, in this embodiment, a biodegradable resin may be used as the thermoplastic resin. Examples of thermoplastic biodegradable resins include, but are not limited to, polylactic acid, polybutylene succinate, polyethylene succinate, polyglycol, polycaprolactone, and polyvinyl alcohol.

The thermoplastic resin used in the present embodiment may be in any form, but it is preferable to use a granulated one in terms of ease of handling. Also, two or more thermoplastic resins can be used at the same time. Furthermore, at the time of kneading with the roasted woody biomass, a compatibilizing resin (compatibilizing agent), which is also a thermoplastic resin, may be added for the purpose of improving uniformity and adhesion.

As the compatibilizing resin, a known compatibilizing resin is used, and examples thereof include, but are not limited to, maleic acid-modified polypropylene (Umex 1010, manufactured by Sanyo Kasei), Modic (registered trademark) P908 (manufactured by Mitsubishi Chemical), and the like. be done. The compatibilizing resin functions to improve uniform mixing and adhesion between the roasted woody biomass and the thermoplastic resin. A compatibilizing resin may not be used, but if it is used, it is used in an amount of up to about 15% by mass in the resin composite material obtained by kneading.

The roasted woody biomass used in the present embodiment may be obtained by roasting woody biomass. Roasting in this manner yields a solid fuel that has a higher energy density than its starting material. Such roasted woody biomass can be obtained, for example, by roasting pulverized woody biomass with a size of 50 mm or less under conditions of an oxygen concentration of 10% or less and a material temperature of 240 to 350 ° C. .

Both broad-leaved trees and coniferous trees can be used as the raw material for the roasted woody biomass product. Specifically, but not limited to, broad-leaved trees include eucalyptus, Hevea brasiliensis, beech, China, white birch, poplar, acacia, oak, maple, senoki, elm, paulownia, magnolia, willow, sen, and Quercus phillyraeoides. , Quercus serrata, Sawtooth oak, Horse chestnut, Japanese zelkova, Mizume, Dogwood, Aodamo, etc. Conifers include Japanese cedar, Ezo spruce, Japanese larch, Japanese black pine, Sakhalin fir, Himekomatsu, Yew, Nezuko, Japanese spruce fir, Japanese fir, Dogwood, Fir, Spanish mackerel, Togasawara , Asunaro, Japanese cypress, Japanese hemlock, Japanese hemlock, Japanese cypress, yew, dogwood, spruce, yellow cedar, Lawson cypress, Douglas fir, Sitka spruce, Radiata pine, Eastern spruce, Eastern white pine , western larch, western fur, western hemlock, tamarack and the like.

Among these, eucalyptus wood and Hevea brasiliensis are preferred. Eucalyptus includes Eucalyptus (hereinafter abbreviated as E.) calophylla, E. citriodora, E. diversicolor, E. globulus, E. grandis, E. urograndis, E. gummifera, E. marginata, E. nesophila, E. nitens, E. amygdalina, E. camaldulensis, E. delegatensis, E. gigantea, E. muelleriana, E. obliqua, E. regnans, E. sieberiana, E. viminalis, E. marginata, and the like.

In the present embodiment, the form of woody biomass as a raw material is not limited, and wood chips, bark, sawdust, sawdust, etc., can be suitably used, for example. In a preferred embodiment, woody biomass with a size of 50 mm or less can be used as a raw material. Woody biomass of such a size may be adjusted to a size of 50 mm or less by pulverizing, for example, and woody biomass having a size of 1 mm or more and 50 mm or less is preferable. In this embodiment, the size of the pulverized woody biomass can be selected by sieving according to the size of the holes of the sifter. Pulverization of woody biomass may be carried out using, for example, a hammer mill or a knife-cutting type biomass fuel chipper.

Such raw material woody biomass is roasted to obtain a roasted woody biomass product. Torrefaction generally refers to a process of heating in a low-oxygen atmosphere at a lower temperature than the so-called carbonization process. The temperature for carbonization treatment of ordinary wood is 400 to 700°C, but in the present embodiment, the roasting is performed at 240 to 350°C, for example.

The processing conditions for roasting in the present embodiment are an oxygen concentration of 10% or less and a substance temperature of 240 to 350°C. Here, the substance temperature in roasting is the temperature of the woody biomass near the exit of the roasting treatment apparatus. In the present embodiment, the roasting is performed under the condition that the oxygen concentration is 10% or less, but if the oxygen concentration exceeds 10%, the material yield and heat yield may decrease. Also, if the substance temperature is less than 240°C, it is difficult to pulverize the roasted product to a small particle size, and if it exceeds 350°C, the substance yield and heat yield decrease. The material temperature is preferably 240-330°C, more preferably 250-320°C. Thermal decomposition of hemicellulose becomes significant at around 270°C, whereas thermal decomposition of cellulose becomes significant at around 355°C, and lignin at around 365°C. Therefore, it is presumed that hemicellulose is preferentially thermally decomposed, and that it becomes possible to produce a resin material for molding that achieves both material yield and pulverizability.

In the present embodiment, the apparatus for performing the roasting treatment is not particularly limited, but a rotary kiln and/or a vertical furnace are preferred. In order to adjust the oxygen concentration to 10% or less, it is preferable to replace the inside of the apparatus with an inert gas such as nitrogen. The treatment time of the roasting treatment is not particularly limited, but is preferably 1 to 180 minutes, more preferably 5 to 120 minutes, and even more preferably 10 to 60 minutes. When using a continuous apparatus, the residence time in the roasting apparatus should be controlled.

In the present embodiment, an external heat roasting device may be used as the roasting device. For example, an external heat type rotary kiln has a structure in which a part or all of the kiln inner cylinder is covered with a kiln outer cylinder, and woody biomass is roasted in the inner cylinder and fuel is burned in the outer cylinder. The woody biomass inside the inner cylinder is indirectly heated. The temperature in the kiln outer cylinder can be 400-800°C, preferably 450-750°C. If the temperature in the kiln outer cylinder is less than 400° C., the woody biomass in the kiln inner cylinder will be insufficiently pyrolyzed, and the pulverizability of the resulting solid fuel will be reduced. On the other hand, if the temperature exceeds 800° C., the temperature of the woody biomass inside the kiln inner cylinder rises excessively, and the material yield and heat yield of the obtained solid fuel decrease.

The roasted product used in the present embodiment preferably has a substance yield of 60 to 90% and a calorie yield of 70 to 95% with respect to woody biomass as a raw material. The hard glove crushability index (HGI) specified in JIS M 8801:2004, which is an index of crushability, is preferably 25 or more, more preferably 30 or more. A higher HGI indicates easier pulverization. When the HGI is in the range of 25 to 70, it becomes easy to mix with a thermoplastic resin and perform molding.

The woody biomass roasted product used in the present embodiment may be a molded product. That is, a pulverized starting material (roasted product) of woody biomass is formed into briquettes or pellets. Molding facilitates handling and increases the density, thereby reducing transportation costs. The bulk density of the molded product after densification treatment is preferably 500 kg/m ³ or more, more preferably 600 kg/m ³ or more. The bulk density can be measured according to JIS K 2151, "6. Bulk Density Test Method".

In the present embodiment, the device for forming the roasted product into a molded product is not particularly limited. , manufactured by Dalton).

In the present embodiment, when the woody biomass roasted product is formed into a molded product, the moisture content of the woody biomass roasted product is preferably 8 to 50%, more preferably 10 to 30%. If the moisture content is less than 8%, clogging occurs inside the briquette or pelletizer, making it impossible to stably produce moldings. If the moisture content exceeds 50%, molding becomes difficult and the product is discharged in the form of powder or paste.

In the present embodiment, a binder may be added to the roasted woody biomass. Although the binder is not particularly limited, for example, organic polymers such as starch and lignin, inorganic polymers such as acrylic acid amide, and agricultural residues such as wheat bran (residues generated during wheat flour production) can be preferably used. From the viewpoint of efficient and effective use of woody biomass, it is desirable that the amount of binder added is small, preferably 50 parts by mass or less, more preferably 20 parts by mass or less per 100 parts by mass of roasted woody biomass. However, even if it is added in excess of 50 parts by mass, it does not mean that densification is impossible.

In addition, as raw materials, other components including organic and/or inorganic substances other than the thermoplastic resin and the roasted woody biomass may be contained. Other components include, for example, alkalis such as sodium hydroxide, potassium hydroxide, magnesium hydroxide, and calcium hydroxide; inorganic fillers such as clay, talc, calcium carbonate, maiko, titanium dioxide, and zinc oxide; carbon black, Organic fillers such as graphite and glass flakes; dyes or pigments such as red iron oxide, azo pigments, and phthalocyanine; dispersants, lubricants, plasticizers, mold release agents, flame retardants, antioxidants (phenolic antioxidants, , sulfur-based antioxidants), antistatic agents, light stabilizers, ultraviolet absorbers, metal deactivators, crystallization accelerators (nucleating agents), foaming agents, cross-linking agents, additives for modification such as antibacterial agents etc.

In the present embodiment, it is preferable to pulverize the roasted woody biomass before kneading it with the thermoplastic resin. The average particle size of the pulverized material is preferably 500 µm or less, more preferably 300 µm or less, and particularly preferably 200 µm or less. If the average particle size of the pulverized product of the roasted woody biomass is larger than 500 μm, it becomes difficult to uniformly mix it with the resin. The resin body of the object may be cut into small pieces. In such a case, problems may occur such as difficulty in carrying out the molded body obtained by extrusion to a cooling treatment device. In this specification, the "average particle size" is a volume 50% average particle size (D50) measured by a laser light scattering method (laser diffraction method), and a laser diffraction/scattering particle size distribution analyzer (manufactured by Malvern , device name: Mastersizer 2000).

The pulverizer used for pulverizing the roasted woody biomass may be any device capable of pulverizing organic matter, and examples thereof include, but are not limited to, ball mills, rod mills, bead mills, conical mills, disk mills, edge mills, hammer mills, and mortars. , pellet mill, VSI mill, Willie mill, roller mill, jet mill, masscolloider, etc. As a pulverizer, a twin-screw kneading extruder (TEX series such as TEX30, manufactured by Japan Steel Works, Ltd.) may be used.

The resin composite material of the present embodiment is obtained by heating and kneading the roasted woody biomass material with a thermoplastic resin and extruding the mixture as follows. The blending ratio of the roasted woody biomass in the resin composite material is preferably high in order to achieve a high level of carbon neutrality, but considering the resin composite material and the strength of the resulting molded product, the ratio is 10. It is preferably 90% by mass or more, more preferably 30% by mass or more and 80% by mass or less.

<Method for producing resin composite material>
Next, each step of the resin composite material manufacturing method of the present embodiment will be described, taking as an example the case where the resin composite material manufacturing apparatus 10 of FIG. 1 described above is used.

First, the raw material of the resin composite material prepared as described above is supplied from the raw material supply unit 11 to the cylinder 12 [(1a) raw material supply step]. The thermoplastic resin and the roasted woody biomass material, which are raw materials, are separately fed into the shooter of the raw material supply unit 11 from above by, for example, a feeder or the like, and the fed raw materials are mixed and supplied to the cylinder 12. .

The raw material supplied to the cylinder 12 is heated by a heater provided outside the cylinder 12 or by heat generated when the raw material is sheared, and the thermoplastic resin is melted and plasticized [(1b) kneading step ]. The melt-plasticized thermoplastic resin and the roasted woody biomass are kneaded by a screw provided in the cylinder 12 to obtain a kneaded mixture of the thermoplastic resin and the roasted woody biomass.

In the present embodiment, the temperature for kneading (heating, melting, kneading, etc.) is usually about 100 to 300°C, preferably about 100 to 250°C, and particularly preferably about 100 to 200°C.

In the method for producing a resin composite material according to the present embodiment, for example, a general extruder is used to heat and knead the roasted woody biomass material and the thermoplastic resin. The extruder is preferably a twin-screw kneading extruder, and the twin-screw kneading extruder can be used in either the step of pulverizing the roasted woody biomass or the step of heating and kneading the pulverized roasted woody biomass and the thermoplastic resin. . Therefore, it is also possible to continuously produce a resin composite material by connecting twin-screw kneading extruders or performing these two processes continuously with one apparatus.

Next, the obtained kneaded material is passed through the cylinder 12 by a screw and conveyed to the downstream side (the side of the die 14) [(1c) Conveying step]. During this transportation, the thermoplastic resin and the roasted woody biomass are sufficiently kneaded to form a uniform kneaded product. Here, if the mixture is not sufficiently kneaded, it may not be possible to form the kneaded product into a desired shape in the subsequent extrusion step, or the required characteristics may not be obtained.

In this (1c) conveying step, the temperature inside the cylinder 12 is maintained so that the kneaded material flows smoothly. That is, the temperature heated in the kneading step (1b) may be maintained, or the temperature at which the kneaded material can flow may be maintained. In the conveying process, the kneaded material that has moved to the downstream side of the cylinder 12 is finally extruded from the die 14 into a desired shape [(1d) Extruding process], and further solidified by cooling to form a resin composite material. becomes.

The shape of the resin composite material obtained here is not particularly limited, but may be a strand shape, a sheet shape, or the like. A resin composite material molded into a strand or sheet is cut into a desired size and used as a material for molding products.

(Deaeration of volatile gas)
In the kneading step (1b), the volatile gas generated from the kneaded product obtained by kneading the thermoplastic resin and the roasted woody biomass is discharged to the outside from the degassing unit 13 provided on the upstream side of the cylinder 12. I care Here, the degassing section 13 is provided on the upstream side of the cylinder 12 as described above. That is, the position where the volatile gas degassing section 13 is provided is between the connection portion with the raw material supply section 11 and the position where the thermoplastic resin is melted and plasticized, and is within 70% of the total length of the screw from the raw material supply section 11. , more preferably within 40% of the total length of the screw from the raw material supply section 11, and more preferably the connecting portion of the cylinder 12 with the raw material supply section 11 (immediately after the raw material supply section 11).

Further, it is preferable that the degassing unit 13 is composed of a degassing cylinder capable of suction degassing, because the volatile gas can be efficiently removed.

By providing the degassing unit 13 in this manner, the volatile gas generated from the kneaded material can be efficiently degassed. By this degassing, it is possible to prevent the kneaded material from being conveyed or extruded while the volatile gas is mixed therein. In addition, even when the amount of material input is increased, the material can be stably supplied.

(Background of consideration)
The inventors of the present invention have been studying the production of resin composite materials by extrusion molding using thermoplastic resin and woody biomass. It was found that mixing and kneading becomes easier when the woody biomass roasted product is used as a raw material.

By the way, when using this roasted woody biomass material as a raw material and trying to manufacture a resin composite material with an extruder, the roasted woody biomass material adheres to the shooter of the raw material supply unit, or clumps at the input port of the raw material supply unit. was formed, and the raw material supply amount became unstable. If the raw material supply amount becomes unstable, the production amount (extrusion amount) of the resin composite material per unit time will decrease, and efficient production will not be possible.

In order to ascertain the cause of this instability in the amount of raw material supplied, the present inventors conducted thermogravimetric analysis to investigate how the amount of gas generated from the woody biomass roasted product changes in relation to the heating temperature. Specifically, the woody biomass roasted material (TRF; lumps with a diameter of 8 mm) as a raw material and the pulverized woody biomass roasted material (TRF pulverized product; average particle diameter of 36 mm), Using a thermogravimetric analyzer (TG-DTA), the mass change (mass reduction rate) of the roasted woody biomass when heated at a temperature rising rate of 20 ° C./min was investigated. The “TRF” used here is woody biomass roasted product roasted at 280° C. for 12 minutes (manufactured by Nippon Paper Industries).

As a result, it was found that when the woody biomass roasted product was heated, the mass decreased by about 5 to 7% at around 100 ° C., and after a temporary stagnation, the mass decreased again at a temperature of 230 ° C. or higher. . It is believed that this initial mass reduction is mainly due to the fact that the moisture contained in the roasted woody biomass material is vaporized into water vapor, which is released. In this respect, in the above step (1b), the thermoplastic resin is heated to a temperature at which it is melted and plasticized, so the roasted woody biomass to be kneaded with the thermoplastic resin is also heated, and at this time, the volatile gas ( water vapor) is generated. The generated steam flows into the raw material supply unit 11, causing the woody biomass to adhere to the shooter or form clumps at the input port of the raw material supply unit 11, thereby destabilizing the amount of raw material supplied. , is considered to be caused by the occurrence of such a phenomenon.

Therefore, the present inventors have found that by releasing such water vapor to the outside immediately after it is generated from the cylinder 12, it is possible to solve the above problems and stabilize the supply amount of the raw material. It was also found that by stabilizing the supply amount of the raw material, the throughput of the kneaded material can be increased and the production efficiency of the resin composite material can be improved.

In addition, it was found that the mass decrease at 230 ° C. or higher is considered to be gas generated by decomposition of the roasted woody biomass (gas component derived from the kneaded product), and a large mass decrease occurs. Measures for this point will be described again below.

(Embodiment 2)
<Production equipment for resin composite materials>
The second embodiment is an embodiment in which the raw materials, the thermoplastic resin and the roasted woody biomass, are supplied at different positions, and other configurations are the same as those of the first embodiment.

For example, as shown in FIGS. 3A and 3B, the resin composite material manufacturing apparatus 20 according to the second embodiment includes a resin supply unit 21, a cylinder 12, a woody biomass supply unit 22, a volatile gas degassing unit 23, the die 14, and the rotation drive mechanism 15. The following description will focus on portions that are different from the first embodiment.

In this resin composite material manufacturing apparatus 20, a resin supply unit 21 and a woody biomass supply unit 22 are provided at different positions. It is heated to melt and plasticize, and the roasted woody biomass is later supplied to the melted and plasticized thermoplastic resin.

Here, the resin supply section 21 is provided at the same position as the raw material supply section 11 of Embodiment 1, and its configuration is also the same as that of the raw material supply section 11 . The resin supply unit 21 is different from the raw material supply unit 11 in that a thermoplastic resin is supplied as a raw material, but no roasted woody biomass is supplied.

The woody biomass supply unit 22 is provided on the downstream side of the resin supply unit 21 in the cylinder 12, and heats and melts the previously supplied thermoplastic resin to melt and plasticize the melted thermoplastic resin. It is designed to be able to supply and mix woody biomass to

The woody biomass supply unit 22 only needs to be able to supply the roasted woody biomass into the cylinder 12. For example, a screw-type feeder (side feeder) connected to an opening provided on the side surface of the cylinder 12 is used. can.

As shown in FIGS. 3A and 3B, the woody biomass supply unit 22 is connected in the middle of the cylinder 12 (in FIG. The cylinder 12 is basically the same as that of the first embodiment, but differs in that the degassing section 13 is not provided.

This woody biomass supply unit 22 can be a screw-type feeder (for example, a side feeder). At this time, the woody biomass supply unit 22 connects a cylinder 22a having a screw to the side surface of the cylinder 12, and feeds the melted and plasticized resin being conveyed in the cylinder 12 with the roasted woody biomass from the middle. can be added. The cylinder 22a has a shooter 22b for charging the roasted woody biomass, and the roasted woody biomass fed from the shooter 22b is conveyed through the cylinder 22a by a screw connected to a rotation drive mechanism 22c. . The roasted woody biomass is conveyed toward the cylinder 12, and is added to and mixed with the melted and plasticized thermoplastic resin in the cylinder 12 at the connecting portion between the cylinder 12 and the cylinder 22a.

In this embodiment, the volatile gas degassing unit 23 is provided between the cylinder 12 and the woody biomass supply unit 22, and mainly the woody biomass roasting is performed on the melt-plasticized thermoplastic resin. Volatile gases generated when the pottery is added can be removed from the cylinder 12 to the outside.

Furthermore, in order to efficiently remove the volatile gas, a degassing device capable of vacuum suction may be used as the degassing unit 23 . By providing such a degassing device, the volatile gas generated within the cylinder 12 can be removed more efficiently. The same degassing device as described in the first embodiment can be used as this degassing device capable of vacuum suction.
<Method for producing resin composite material>
Next, each step of the resin composite material manufacturing method of the present embodiment will be described, taking as an example the case where the resin composite material manufacturing apparatus 20 of FIGS. 3A and 3B described above is used.

First, the raw material of the resin composite material prepared as described above is supplied from the resin supply unit 21 to the cylinder 12 [(2a) resin supply step]. A thermoplastic resin, which is a raw material, is charged into the shooter 21 a of the resin supply unit 21 from above by a feeder or the like, and the charged raw material is supplied to the cylinder 12 .

The thermoplastic resin supplied to the cylinder 12 is heated and melted and plasticized by a heater provided outside the cylinder 12 or by heat generated when the raw material is sheared [(2b) melt-plasticization step]. .

Next, the roasted woody biomass is supplied from the woody biomass supply unit 22 into the cylinder 12, the roasted woody biomass is added to the melted and plasticized resin, and the screw provided in the cylinder 12 is added. to obtain a kneaded product of the thermoplastic resin and the roasted woody biomass [(2c) kneading step].

The obtained kneaded material is conveyed to the downstream side (the die 14 side) through the cylinder 12 by the screw [(2d) Conveying step]. During this transportation, the thermoplastic resin and the roasted woody biomass are sufficiently kneaded into a uniform mixed state. Here, if the mixture is not sufficiently kneaded, a molded article having desired properties cannot be obtained in the subsequent extrusion step.

In the conveying process, the kneaded material that has moved to the downstream side of the cylinder 12 is finally extruded from the die 14 so as to have a desired shape [(2e) Extruding process], and is further cooled and solidified to form a resin. Composite material.

This Embodiment 2 has the same configuration as Embodiment 1, except that the thermoplastic resin and the roasted woody biomass are supplied from different positions. That is, in this second embodiment, the thermoplastic resin is first supplied to the cylinder 12, heated and melted and plasticized, and then the woody biomass roasted product is added and kneaded with the thermoplastic resin.

By separating the raw material supply positions in this manner, the position where the degassing unit 23 in the second embodiment is provided is changed to the connecting portion of the woody biomass supply unit 22 with the cylinder 12 .

In this second embodiment, when the melted and plasticized thermoplastic resin is mixed with the roasted woody biomass, volatile gas is generated from the roasted woody biomass immediately after mixing. At that time, since the degassing section 23 is provided upstream of the mixing position, the generated volatile gas can be immediately removed from the cylinder 12 to the outside. As a result, problems caused by the generation of water vapor can be eliminated.

That is, as in the first embodiment, the stabilization of the raw material supply amount can be achieved. And thereby, the extrusion rate of a kneaded material can be increased and the manufacturing efficiency of a resin composite material can be improved.

(Embodiment 3)
<Production equipment for resin composite materials>
This Embodiment 3 is an embodiment having a degassing section different from the degassing section 13 that can release the gas component derived from the kneaded material generated when the kneaded material is conveyed from the cylinder 12 to the outside from the cylinder 12. Other configurations can be the same as those of the first embodiment.

For example, as shown in FIG. 4, a resin composite material manufacturing apparatus 30 according to the third embodiment includes a raw material supply unit 11, a cylinder 12, a degassing unit 13, a die 14, and a rotation drive mechanism 15. , and a degassing section 31 . The following description will focus on portions that are different from the first embodiment.

The resin composite material manufacturing apparatus 30 according to the third embodiment includes all the configurations of the resin composite material manufacturing apparatus 10 according to the first embodiment, and in addition, a degassing section 31 connected to the cylinder 12 have.

This degassing part 31 mainly has an opening that can remove the gaseous component derived from the kneaded material from the cylinder 12 to the outside. 1 illustrates a configuration with a device for This suction degassing device is connected in the middle of the cylinder 12 (in FIG. 4, on the back side of the cylinder 12 (on the same horizontal plane as the cylinder 12, provided in a direction orthogonal to the extending direction of the cylinder 12).

In addition, FIG. 5 shows an example of the configuration of the suction degassing device. FIG. 5 is a schematic diagram of the connection structure between the cylinder 12 and the suction degassing device as viewed from the die 14 side. This suction degassing device includes a cylinder 310, two screws S2a and S2b provided inside the cylinder 310, a vent portion 320 provided in communication with the space inside the cylinder 310 and capable of being reduced in pressure, screws S2a, and a rotary drive mechanism 330 connected to S2b. The vent section 320 can be brought into a decompressed state by, for example, being connected to a vacuum pump. Also, the structure near the cylinder 310 of the suction degassing device is similar to the structure of the cylinder 12, but the screw diameter and the cylinder diameter can be designed to be much larger than the cylinder 12. Moreover, the number of screws of the suction degassing device is not particularly limited to two.

When such a suction degassing device is provided as the degassing unit 31, the screws S2a and S2b are rotated by the rotation drive mechanism 330, so that the kneaded material conveyed inside the cylinder 12 flows back into the suction degassing device. In addition to preventing the kneaded material from coming out (pushing the kneaded material in the direction of the cylinder 12 ), the gas component derived from the kneaded material can be discharged out of the cylinder 12 . A gaseous component derived from the discharged kneaded material is removed to the outside from the cylinder 310 via the vent 320 (broken line arrow in FIG. 5).

Here, as the deaeration unit 31, a vent device can be provided instead of the suction deaeration device. As the venting device, a vacuum venting device is preferable, and the vacuum venting device is a device configured to directly remove the gaseous component originating from the kneaded material through a vent hole provided in the cylinder 12 by a vacuum pump.

In the resin composite material manufacturing apparatus 30 of FIG. , the number of which may be one or three or more as long as the gas component derived therefrom can be effectively removed. Also, the place of installation can be appropriately changed depending on the manufacturing equipment to be used, the manufacturing conditions, and the like.

The "gas component derived from the kneaded material" assumed in the present embodiment is mainly a gas generated when the kneaded material is heated for a relatively long time or when the heating temperature becomes high. For example, in the present embodiment containing roasted woody biomass as a raw material, the roasted woody biomass is decomposed by being heated to a temperature equal to or higher than the roasting temperature. It does not include volatile gas that is contained in the roasted product and is generated by vaporization due to heating.
<Method for producing resin composite material>
Next, each step of the method for producing a resin composite material according to the present embodiment will be described, taking as an example the case of using the apparatus 30 for producing a resin composite material shown in FIG. 4 described above.

The resin composite material manufacturing method using this resin composite material manufacturing apparatus 30 is performed by the same steps (steps (1a) to (1d)) as the operations described in the first embodiment. Then, in the present embodiment, in the step (1c) (conveying step), the kneaded product-derived gas generated from the kneaded product can be removed from the cylinder 12 to the outside through the degassing section 31 . As a result, even if gas originating from the kneaded material is generated in the cylinder 12, the gas is prevented from entering the kneaded material, and the kneaded material can be conveyed stably. Therefore, the resin composite material obtained by extrusion from the die 14 can maintain the desired quality and improve the production efficiency.

In the above description of the third embodiment, the case where the degassing section 31 is added to the first embodiment has been described, but the same can be applied to the second embodiment.

(Modification)
As already described, the die 14 described in the above embodiment can be used without particular limitation as long as it is a known die used as an extruder.

As described above, since the resin composite material described in this specification extrudes the kneaded material containing the roasted wood biomass, it is conveyed so that the temperature does not rise to a temperature at which the roasted wood biomass decomposes as much as possible. , preferably extruded. The temperature of the kneaded material may rise even in the interior of the die (storage area) due to the shearing force, so it is preferable to facilitate the extrusion of the kneaded material from the die holes as much as possible. At this time, it is also preferable to make the staying portion small.

For example, FIG. 6 is an enlarged view of a die hole 14a (extrusion hole) and a retention portion 14b connected thereto as an example of the die 14. As shown in FIG. At this time, assuming that the length of the die hole 14a is L and the diameter is D, in order to facilitate the extrusion of the kneaded material and suppress the temperature rise of the kneaded material, the diameter D The ratio (L/D) of the length L to the length is preferably 5 or less, more preferably 4 or less, and even more preferably 3 or less. In this relationship, the smaller the numerical value, the lower the possibility of causing an excessive increase in the pressure inside the stagnant portion, and the easier the extrusion from the stagnant portion becomes.

It is also preferable to check the pressure and the temperature of the kneaded material in the stagnant portion of the die 14 and control the pressure and temperature so that they do not become excessively high. At this time, the die 14 is provided with a pressure gauge, a thermometer, etc., and predetermined pressures and temperatures are set, and whether or not the set values are exceeded is monitored. Then, when the set value is exceeded, it is preferable to provide a control device that performs control so that the set value is kept within the set value. For example, when these pressures and temperatures exceed predetermined values, the heating temperature of the cylinder 12 is lowered, the rotation speed of the screw of the cylinder 12 is lowered, the gas in the stagnant portion is released to the outside, The pressure and temperature can be adjusted by feedback control such as

If decomposition of the roasted woody biomass described in Embodiment 1 occurs, there is a risk that the pressure in the stagnant portion of the die 14 will rise, the production efficiency of the resin composite material will decrease, and the quality will decrease. Therefore, it is preferable to suppress such decomposition, and it is preferable to produce a resin composite material by maintaining the temperature of the kneaded product (woody biomass roasted product) so as not to exceed the roasting temperature. At this time, the temperature of the kneaded product tends to rise in the die 14 where the extrusion molding is performed. Just do it.

As described above, some embodiments have been described, but the resin composite material obtained in this embodiment can be molded for various purposes, such as a substitute for plastic products, that is, a tray. , automobile parts, interiors such as automobile dashboards, luggage compartments for airplanes, structural members for transportation equipment, housings for home appliances, cards, various containers such as toner containers, construction materials, seedling pots, agricultural use Manufacture of sheets, writing instruments, substitutes for wooden products, household appliances, straws, cups, toys, sporting goods, harbor components, building components, generator components, tools, fishing gear, packaging materials, 3D printer models, pallets, etc. It is widely applicable to When these products are no longer needed, they will be discarded. can be treated as not increasing the amount of carbon dioxide in the

(Example)
The apparatus and method for producing a resin composite material according to the present embodiment will be described in detail below using examples and comparative examples.

<Preparation of woody biomass roasted product>
First, a woody biomass roasted product (TRF) as a raw material was obtained as follows.

Eucalyptus Eurograndis wood chips are pulverized with a disc chipper, and after pulverization, the pulverized chips with a size of 1 to 50 mm are dried at a hot air temperature of 70 ° C. for 3 hours using a conveyor dryer (manufactured by Alvan Blanch). , water content was adjusted to 10%.

Subsequently, using a large rotary kiln type carbonization furnace, the oxygen concentration is 1% or less, the substance temperature of the crushed chips in the carbonization furnace is 280 ° C., and the roasting is performed for a residence time of 12 minutes to produce woody biomass. of the roasted product was obtained. The size of the roasted product thus obtained was not uniform, and some had a size of 1 to 50 mm. After cooling the roasted product, it was pulverized to 5 mm or less with a hammer mill. The water content of the pulverized roasted product is adjusted to 12%, and densification treatment is performed using a ring die type pelletizer (manufactured by Triumph) using a ring die with a die hole diameter of 8 mm and a die thickness of 26 mm. Pelletized (diameter: about 8 mm, length: about 26 mm).

Next, the pellets were put into a twin-screw kneading extruder (manufactured by Nippon Steel Works, trade name: TEX30), and the pelletized roasted product was pulverized to an average particle size of about 150 μm. Here, the average particle size of the pulverized roasted product was measured with an automatic sonic vibration type sieving analyzer (manufactured by Seishin Co., Ltd., trade name: Robot Shifter RPS-105).

(Example 1)
Using the resin composite material manufacturing apparatus 30 shown in FIG. (MFR): 15 g/10 min) were used as raw materials, and these raw materials were continuously heated and kneaded while being mixed to produce a resin composite material.

At this time, the resin composite material was produced under a plurality of conditions as shown in Table 1, and the production status (strand status) of the resin composite material extruded into strands at that time was evaluated according to the following criteria. are also shown in Table 1 (Examples 1-1 to 1-6).
[Evaluation criteria]
〇: The resin composite material could be manufactured in a strand shape, and pellets could be made with a strand cutter.
△: The resin composite material could be produced in a strand shape, but the strand cutter could not produce pellets.
x: The resin composite material could not be produced in a strand shape.

The "kneaded material temperature" in the table is a value obtained by measuring the temperature of the kneaded material immediately before extrusion using a thermometer provided on the die 14. In addition, as the manufacturing apparatus 30 for the resin composite material, a twin-screw kneading extruder (manufactured by Japan Steel Works, Ltd., trade name: TEX30) is provided with a degassing cylinder 130 shown in FIG. A die having an L/D ratio of 2.0 in the die hole 14a was used, and a device incorporating the suction degassing device shown in FIG.

(Example 2)
As the resin raw material to be used, instead of polypropylene (manufactured by Prime Polymer Co., Ltd., trade name: J106G, melt flow rate (MFR): 15 g / 10 min), polypropylene (manufactured by Japan Polypro Co., Ltd., trade name: BC10HRF, melt flow rate (MFR ): 100 g/10 min), a resin composite material was produced in the same manner as in Example 1. Table 2 shows the results of the production conditions and production conditions (Examples 2-1 to 2-4).

The evaluation criteria for the production status (strand status) of the resin composite material are the same as above.

(Comparative example 1)
Using the resin composite material manufacturing apparatus 50 shown in FIG. (MFR): 15 g/10 min) were used as raw materials, and these raw materials were continuously heated and kneaded while being mixed to produce a resin composite material.

At this time, the resin composite material was produced under a plurality of conditions as shown in Table 3, and the production status (strand status) of the resin composite material extruded into strands at that time was evaluated, and the results are also shown. 3 (Comparative Examples 1-1 to 1-5).

The resin composite material manufacturing apparatus 50 used here has a raw material supply unit 11 , a cylinder 12 , a die 14 , a rotation drive mechanism 15 , and degassing ports 51 and 52 . The resin composite material manufacturing apparatus 30 used in the embodiment does not have the degassing section 31, and uses a die having an L/D of 4.5 for the die hole 14a as the die 14, and the middle stream portion of the cylinder 12 1 and 2 are different in construction in that they have degassing ports 51 and 52 in the downstream section, but otherwise the manufacturing apparatus has the same construction. The degassing ports 51 and 52 are simply openings.

The evaluation criteria for the production status (strand status) of the resin composite material are the same as above.

From the above results, in Examples 1 and 2, the roasted woody biomass did not adhere to the shooter of the raw material supply unit or form a plug at the inlet of the extrusion device, and the raw material supply amount was stable. was In addition, since the above problems were eliminated, stable extrusion molding was possible even when the amount of raw material supplied was increased, and efficient production of the resin composite material was also possible. Furthermore, the increase in temperature of the kneaded material could be suppressed, and from this point of view, stable extrusion molding was possible.

On the other hand, in Comparative Example 1, the woody biomass roasted product adhered to the shooter of the raw material supply unit and formed lumps at the inlet of the raw material supply unit, so the raw material supply amount was unstable and stable extrusion molding was performed. I couldn't do it. Therefore, it was not even possible to consider increasing the amount of raw material supplied. In addition, the temperature of the kneaded material tends to increase due to the instability of the raw material supply amount, and this is also considered to be one of the reasons why the strand condition is not good.

Reference Signs List 10, 20, 30 Resin composite material manufacturing apparatus 11 Raw material supply units 11a, 21a, 22b Shooter 12 Cylinders 13, 23, 31 Degassing unit 14 Die 15 Rotation drive mechanism 21 Resin supply unit 22 Woody biomass supply unit

Claims (18)

A method of manufacturing a resin composite material comprising the steps of:
(1a) a step of supplying a thermoplastic resin and a roasted woody biomass from a raw material supply unit to a first cylinder;
(1b) a step of melt-plasticizing the thermoplastic resin and kneading the melt-plasticized thermoplastic resin and the roasted woody biomass in the first cylinder;
(1c) a step of conveying the kneaded material obtained by kneading through the first cylinder; and (1d) extruding the conveyed kneaded material from a die provided in the first cylinder to obtain a woody material. a step of producing a system biomass/thermoplastic resin composite material;
Here, in the step (1b), the volatile gas generated from the kneaded material is deaerated to the outside from the first deaerator. In the method for producing a resin composite material according to claim 1,
The method for producing a resin composite material, wherein the first degassing section is provided at a connection portion of the first cylinder with the raw material supply section. A method of manufacturing a resin composite material comprising the steps of:
(2a) supplying a thermoplastic resin from a resin supply unit to the first cylinder;
(2b) melt plasticizing the thermoplastic resin;
(2c) a step of supplying the roasted woody biomass from the woody biomass supply unit into the first cylinder and kneading it with the melt-plasticized thermoplastic resin;
(2d) conveying the kneaded material obtained by kneading through the first cylinder; and (2e) extruding the conveyed kneaded material from a die provided in the first cylinder to a step of producing a system biomass/thermoplastic resin composite material;
Here, in the step (2c), the volatile gas generated from the kneaded material is degassed to the outside from a first degassing section provided at the connection portion of the woody biomass supply section with the first cylinder. I care In the method for producing a resin composite material according to claim 1 or 3,
A method for producing a resin composite material, wherein the degassing of the volatile gas in the step (1b) or the step (2c) is performed by suction. In the method for producing a resin composite material according to claim 1 or 3,
A method for producing a resin composite material, wherein in the step (1c) or the step (2d), the gas component derived from the kneaded product is degassed to the outside separately from the degassing of the volatile gas. In the method for producing a resin composite material according to claim 5,
The gas component derived from the kneaded material is degassed while pushing the kneaded material toward the first cylinder using a vent device having a second cylinder connected to the side surface of the first cylinder. A method for producing a resin composite material. In the method for producing a resin composite material according to claim 6,
A method for producing a resin composite material, wherein the gas component derived from the kneaded material is degassed while being sucked by the vent device. In the method for producing a resin composite material according to claim 1 or 3,
A method for producing a resin composite material, wherein the temperature of the kneaded material is controlled so as not to exceed the roasting temperature of the woody biomass roasted material. In the method for producing a resin composite material according to claim 1 or 3,
The method for producing a resin composite material, wherein the die has a ratio (L/D) of length L to diameter D of a die hole for extruding the kneaded material of 5 or less. Production equipment for resin composites, including:
a first cylinder;
A raw material supply unit that supplies a thermoplastic resin and a roasted woody biomass material to the first cylinder; and a die for extrusion molding a kneaded product of the thermoplastic resin and the roasted woody biomass material,
Here, the first cylinder has a first degassing section for degassing volatile gas generated from the kneaded material to the outside. In the apparatus for producing a resin composite material according to claim 10,
The apparatus for producing a resin composite material, wherein the first degassing section is provided at a connection portion of the first cylinder with the raw material supply section. Production equipment for resin composites, including:
a first cylinder;
a resin supply unit that supplies a thermoplastic resin to the first cylinder;
A woody biomass supply unit that supplies the roasted woody biomass to the first cylinder; and a die for extrusion molding a kneaded product of the thermoplastic resin and the roasted woody biomass,
Here, the woody biomass supplying section has a first degassing section for degassing volatile gas generated from the kneaded material to the outside at a connection portion with the first cylinder. In the apparatus for producing a resin composite material according to claim 10 or 12,
The apparatus for manufacturing a resin composite material, wherein the first degassing unit is capable of degassing by sucking the volatile gas. In the apparatus for producing a resin composite material according to claim 10 or 12,
An apparatus for producing a resin composite material, comprising a second degassing section for degassing a gaseous component derived from the kneaded material to the outside of the first cylinder, separately from deaeration of the volatile gas. In the apparatus for producing a resin composite material according to claim 14,
The apparatus for producing a resin composite material, wherein the second degassing unit is connected to a vent device having a second cylinder capable of degassing the kneaded material while pushing it toward the first cylinder. In the apparatus for producing a resin composite material according to claim 15,
The vent device is an apparatus for producing a resin composite material, which is capable of sucking and degassing a gaseous component derived from the kneaded material. In the apparatus for producing a resin composite material according to claim 10 or 12,
An apparatus for producing a resin composite material, comprising a control device for controlling the temperature of the kneaded material so as not to exceed the roasting temperature of the roasted woody biomass material. In the apparatus for producing a resin composite material according to claim 10 or 12,
The die has a ratio (L/D) of length L to diameter D of the die hole through which the kneaded material is extruded is 5 or less.

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