KR100987698B1 - Eco-friendly synthetic wood composition and synthetic wood fabricated by the same - Google Patents

Abstract

The present invention comprises polypropylene, high-density polyethylene with a certain ratio of wood flour, lime, coconut shell, pineapple peel, stalk and kaolin in a certain ratio, low production cost, excellent water resistance, durability, strength, etc. The present invention relates to an environmentally friendly synthetic wood composition and a synthetic wood produced therefrom that are not only convenient to mold and construct but also express the texture of wood well.

Description

Eco-friendly synthetic wood composition and synthetic wood fabricated by the same}

The present invention comprises polypropylene, high-density polyethylene with a certain ratio of wood flour, lime, coconut shell, pineapple peel, stalk and kaolin in a certain ratio, low production cost, excellent water resistance, durability, strength, etc. The present invention relates to an environmentally friendly synthetic wood composition and a synthetic wood produced therefrom that are not only convenient to mold and construct but also express the texture of wood well.

In general, natural wood is mainly used as interior and exterior materials of buildings such as floorboards, ceiling boards, doors, door frames, windows and fences. Natural wood is mainly used as interior and exterior materials of buildings as described above because the preference of consumers is greatly increased and the aesthetics of interior and exterior materials of buildings are improved by natural texture.

However, natural wood is not only susceptible to heat, but also has a problem that deformation is such that the absorption rate is large, so that the rot and the side fall off, and when it is dried, it becomes distorted or cracked, wears out. In addition, natural wood needs a long period of post-care, such as long-term painting to extend its life and maintain cleanliness, and environmental problems due to deforestation due to timber felling.

Recently, in order to make up for the weakness of wood, research on synthetic wood having a similar function and appearance as natural wood is being actively conducted. Such semi-permanent synthetic wood is usually made of a mixture of fibers such as wood, crests, corn stalks, pulp, chaff and thermoplastic resins.

However, although various patents have been disclosed in connection with the conventional synthetic wood, they do not completely solve the above-mentioned problems of water resistance, durability, heat resistance, strength, etc., which are expensive, and are expensive to manufacture, and do not sufficiently express wood texture. there is a problem.

In this regard, US Patent No. 7,326,740 discloses a natural product complex including a natural product, a thermoplastic resin, an antifungal agent, and the like. The US registered patent may include an antifungal agent to protect a natural product complex from microorganisms. The purpose and effect for increasing the strength, water resistance, durability, etc. of natural product composites, lowering the cost, and expressing the texture of wood are not disclosed.

Therefore, in the art, it is possible to significantly reduce the manufacturing cost while expressing the texture of wood well, and to have high water resistance, durability, strength, etc., easy to install, do not decay and break after construction, and do not need post management, and there is no deformation of wood, so recycling is not possible. There is a continuing need for development of possible new synthetic wood compositions.

The present invention is to solve the above-mentioned problems, the object of the present invention is low production cost, excellent water resistance, durability, strength, etc., eco-friendly synthetic wood that can express the texture of the wood as well as convenient molding and construction It is to provide a composition and synthetic wood prepared therefrom.

In order to achieve the above object, the present invention, 25 to 35% by weight of polypropylene; 5-10% by weight of high density polyethylene; 30 to 45 wt% of wood flour having an average particle size of 50 to 120 mesh; 10 to 20% by weight of lime having an average particle size of 100 to 200 mesh; 3 to 15% by weight of the shell or stem of the coconut, the average particle size of 60 to 150 mesh; 1 to 5% by weight of the peel or stem of the pineapple having an average particle size of 80 to 150 mesh; 0.1 to 5% by weight of stalk stem having an average particle size of 80 to 150 mesh; And it provides a synthetic wood composition comprising 0.01 to 5% by weight of kaolin having an average particle size of 100 to 200 mesh.

According to one embodiment, one or more of the wood flour, shells or stems of coconut, shells or stems of pineapple, and stalks may be pretreated with chitosan.

According to one embodiment, the composition of the present invention further comprises one or two or more additives selected from the group consisting of coupling agents, internal / external lubricants, fillers, pigments, antioxidants, light stabilizers, ultraviolet absorbers and far infrared radiation materials. It may include.

In another aspect, the present invention provides a synthetic wood prepared by the synthetic wood composition.

Synthetic wood composition of the present invention, by replacing a certain proportion of wood powder with coconut shells, pineapple shells, etc., which are commonly used or discarded as feed, and easy to obtain, eco-friendly synthesis with low production cost but good texture Can provide wood In addition, the synthetic wood composition of the present invention has a high strength, excellent durability, heat resistance, water resistance, etc. by using lime and kaolin together with coconut shells, pineapple shells, etc., and do not cause deformation such as rotting, cracking or twisting after construction. There is no cost to follow up. Furthermore, since the synthetic wood composition of the present invention uses a particle size having a specific range for the wood powder, lime, coconut shell, etc., the mixing and dispersing between the components is well performed, and thus the molding is convenient and the bending strength is excellent. Therefore, the synthetic wood produced according to the present invention can be very usefully used as interior and exterior materials for building such as windows, door frames, flooring materials and moldings.

EMBODIMENT OF THE INVENTION Hereinafter, this invention is demonstrated in detail.

The synthetic wood composition of the present invention includes polypropylene, high density polyethylene, wood flour, lime, coconut shell, pineapple shell, stalk stem and kaolin as essential components.

Polypropylene and high-density polyethylene (HDPE) included in the synthetic wood composition of the present invention, when processed into a synthetic wood that is the final product, compared with conventional natural wood or synthetic wood, strengthening properties such as water resistance, heat resistance, impact strength, bending strength Let's do it.

In addition, since the polypropylene and the high-density polyethylene are non-toxic materials, it is possible to produce environmentally friendly synthetic wood because VOC (volatile organic compounds) and HCHO (formaldehyde), which are toxic substances that cause the sick house syndrome, are not generated.

In particular, since the polypropylene has a relatively smaller coefficient of linear expansion and higher melting point than other thermoplastic resins, the final product is relatively less deformed due to shrinkage or expansion due to severe temperature difference. In addition, the polypropylene can increase the low-temperature impact strength and non-combustibility of the winter, it can also exhibit the appropriate flexibility when constructing the curved surface.

Therefore, the synthetic wood composition of the present invention including such polypropylene and high density polyethylene is not only environmentally friendly but also excellent in physical properties such as water resistance, durability, heat resistance, impact strength, flexural strength, and easy construction.

As the polypropylene and the high density polyethylene in the present invention, any one can be purchased and used without limitation, and the high density polyethylene can be used, for example, having a density range of 0.941 to 0.965 g / cm ² .

The polypropylene is contained in 25 to 35% by weight based on the total weight of the composition of the present invention, if the above range is satisfied, the synthetic wood coming from the temperature difference while enhancing the physical properties such as water resistance, impact strength, bending strength, etc. The deformation of the wood can be prevented as much as possible.

In addition, the high density polyethylene (HDPE) is included in 5 to 10% by weight, based on the total weight of the composition of the present invention, if satisfying the above range, it can enhance the physical properties such as water resistance, impact strength, flexural strength of synthetic wood .

In addition, the synthetic wood composition of the present invention contains wood flour and lime as essential components. The composition of the present invention, together with coconut shell, pineapple shell, etc., by containing a relatively large amount of lime, which is cheaper, lower absorption rate and higher strength than wood flour, it is possible to lower the manufacturing cost, improve water resistance, durability, It can increase the nonflammable effect and strength.

In addition, in the present invention, the wood flour and lime is used to have a certain size of the average particle, specifically, the wood flour is used as a wood flour having an average particle size of 50 to 120 mesh, the lime circuit is an average particle size of 100 Lime, which is from 200 mesh, is used.

By using wood powder having the above-described particle size, the wood texture of natural wood can be better expressed in the synthetic wood which is the final product, and by using the lime having the above average particle size, It can be distributed evenly between and evenly increase the strength of the synthetic wood, it is possible to properly maintain the elongation while sufficiently lowering the water absorption.

In the present invention, the wood powder, the woodworking tool can be used for all processing of the synthetic wood made from the composition of the present invention, and has the same processability as natural wood. These wood meals include hardwoods; Conifers such as pine and fir; Or it may be used, respectively, or a mixture of crushed bamboo, etc., but is not necessarily limited thereto. Preferably, the wood flour may be used as a crushed hardwood, more preferably a crushed maple (for example, maple, croquette, new tree, etc.). In the case of using a pulverized product of Maple family, no toxic substances such as volatile organic compounds and formaldehyde are generated, and the strength is excellent.

In the present invention, the wood powder is more preferably used by pretreatment with chitosan. Chitosan has various functions and functions that are beneficial to the human body, such as antibacterial action, heavy metal suppression and elimination effect, and immune strengthening effect. Thus, when pre-treated in wood flour, chitosan can improve the health of the human body and reduce the damage caused by microorganisms. In addition, it can provide more eco-friendly and durable synthetic wood.

At this time, the wood flour pretreatment method is not particularly limited, but may be used, for example, by coating chitosan on the surface of the wood flour. Using the method of coating the chitosan on the surface of the wood flour, chitosan particles are more uniformly coated and dispersed on the surface of the wood flour than in the case of simply mixing the chitosan in the synthetic wood composition to obtain a much better effect in terms of physical properties.

For example, in the pre-treatment of wood flour, the wood flour is pulverized to have the above average particle size and first dried to have a water content of about 5 to 15%, preferably about 5 to 10%, and then chitosan on the surface of the wood powder. A method of coating a chitosan by applying a solution (concentration: 1 to 99% (w / w)), followed by secondary drying so that the water content is 3% or less, preferably 2% or less, and more preferably 1% or less. It can be performed as.

The wood powder is included in 30 to 45% by weight, based on the total weight of the composition of the present invention, when the above-mentioned range, the effect of the surface appearance is excellent but the mechanical properties are greatly reduced, if less than the above-mentioned range, You can't create a natural wood feel in texture.

Lime included in the synthetic wood composition of the present invention includes quicklime, hydrated lime, and the like, which are much cheaper than wood flour, have a lower absorption rate than wood flour, are not only high in strength but also strong in heat. Therefore, the composition of the present invention comprising the same can significantly lower the manufacturing cost, provide excellent effects in water resistance, heat resistance, durability, strength, and does not cause problems of deformation or after-care.

As described above, the average particle size of the lime is preferably 100 to 200 mesh. By having a particle size in the above-described range, lime is uniformly dispersed between wood flour, coconut shell, etc. in the synthetic wood, and Various strengths, that is, bending strength, screw holding force, and bending strength when wet can be greatly enhanced. If the particle size of the lime is out of the above-described range, the lime may not be evenly dispersed to enhance the strength of a specific portion, or may deteriorate formability and workability.

The lime can also improve the moisture problem contained in the wood meal. That is, by the moisture contained in the wood flour, problems such as foaming, surface defects, warping, etc. may occur in the synthetic wood, the moisture contained in the wood flour can be easily removed by using the lime. Therefore, when a certain amount of lime is used as in the present invention, a separate work or process for removing moisture is unnecessary, and the problem of reabsorbing moisture in the air after drying can be solved.

In addition, the use of lime increases the incombustibility and durability of synthetic wood and is relatively less affected by temperature.

Such lime is included in 10 to 20% by weight, based on the total weight of the composition of the present invention, if it exceeds the above-mentioned range, the manufacturing cost is greatly reduced, but the texture of the wood is not properly expressed, the particles are not evenly dispersed, the strength, formability The back may deteriorate, and if it is less than the above-mentioned range, the cost saving effect is inferior and sufficient effects in terms of strength, water absorption and wood texture are also not achieved.

In addition, the synthetic wood composition of the present invention includes coconut shells and / or stems, pineapple shells and / or stems, and boll stems as essential ingredients.

 The present invention employs coconut by-products and pineapple by-products, which are usually disposed of or used for livestock feed, and easily obtainable oyster stems as essential components, thereby providing a more environmentally friendly, inexpensive, high strength synthetic wood product.

In the present invention, the coconut by-products, pineapple by-products can be used by cutting or grinding to a certain size after drying the peel and / or stem of each fruit, or first cut or milled and then dried. In some cases, the leaves or berries of each fruit may be used together. For example, the present invention is not limited thereto, but as the coconut byproduct, a product such as cocopeat or coconut husk chip may be used, and as the pineapple byproduct, pineapple foil, pineapple silage, or the like may be used.

Preferably, in the case of coconut shells, the average particle size is preferably 60 to 150 mesh, and in the case of pineapple shells, the average particle size is preferably 80 to 150 mesh. Coconut shells and pineapple shells having a particle size in the above range, in combination with the wood powder, lime, and stalk stem of the particle size can be expressed better than the natural wood texture, mixed and dispersed It is also well made can increase the strength, nonflammability of the synthetic wood.

Such coconut shell, etc. are contained in 3 to 15% by weight based on the total weight of the composition of the present invention, pineapple shell and the like is contained in 1 to 5% by weight based on the total weight of the composition of the present invention, if the above range is satisfied only wood powder, lime When used, the manufacturing cost can be further lowered, the strength and durability can be increased, and the effects of breathability and breathability can be provided.

In the present invention, the boll stem may be used by cutting or pulverizing the boll vine stem to a predetermined size after sufficiently drying. 칡 The stem is not only easy to obtain as a natural material but also has a good strength and gives a similar texture to wood. Therefore, the stem can be used to lower the manufacturing cost, increase the strength of synthetic wood, and to express the texture of the wood better. Can be.

Such stems are preferably contained in the average particle size of 80 to 150 mesh to 0.1 to 5% by weight based on the total weight of the composition of the present invention, the wood texture is rather poor, the absorption rate is out of the above range This can be high.

In the present invention, the coconut shell and / or stem, pineapple peel and / or stem and shell stem can be used by pretreatment with chitosan like wood flour.

Meanwhile, in the present invention, the wood flour, coconut shell and / or stem, pineapple shell and / or stem and stem may be dried to have a water content of 10% or less, preferably 5% or less, but the present invention is not limited thereto. no.

In addition, the synthetic wood composition of the present invention contains kaolin as an essential component in addition to the above-mentioned components. The kaolin acts as a filler, and can increase the nonflammability and strength of the synthetic wood because it shows rigidity when dried. In addition, kaolin releases large amounts of far-infrared rays and negative ions to enhance the health of the human body.

Such kaolin is preferably included in an amount of 0.01 to 5% by weight based on the total weight of the composition of the present invention, but beyond the above-described range, sufficient results may not be obtained in strength, incombustibility, touch, and the like. It is also preferred that the average particle size of the kaolin is 100 to 200 mesh so as to mix and disperse well with the remaining components, in particular limestone.

In addition, the synthetic wood composition of the present invention may further comprise additional additives. The additive is not particularly limited as long as it is a material used in the art, and for example, one or two or more types of coupling agents, internal / external lubricants, fillers, pigments, antioxidants, light stabilizers, ultraviolet absorbers, and far-infrared radiation materials may be selected. Can be used. Such additives may be included in the range of 0.1 to 15% by weight relative to the total weight of the composition of the present invention.

In the above, the coupling agent may be used for the purpose of facilitating the bonding when mixing the essential components and to firmly configure the bonding structure. As the coupling agent, conventionally known materials may be used without limitation, and for example, maleic hydride, tetrahydro phthalic hydride, or the like may be used.

The internal / external lubricant is used to increase the dispersion of wood flour, coconut shell, and the like. For example, polyethylene wax, polypropylene wax, or the like may be used.

The filler is not particularly limited, but an inorganic material such as silica may be used, and the surface thereof may be coated with stearic acid.

As the pigment, one or more conventional pigments such as inorganic pigments and organic pigments may be used. Preferably, inorganic pigments may be used.

As the antioxidant, an phosphate-based antioxidant, a phenol-based antioxidant, calcium stearate, or the like may be used, but is not limited thereto.

In addition, for example, bis 2,2,6,6-tetramethyl-4-piperidil may be used as the light stabilizer, but is not limited thereto.

As the ultraviolet absorber, a benzotriazole type may be used. Specifically, 2- (2'-hydroxy-3'-tert-butyl-5'-methyl-phenyl) -5-chlorobenzotriazole may be used. Can be. However, it is not necessarily limited thereto.

As the far-infrared radiation material, jade, germanium, charcoal, loess, magnesium oxide, calcium oxide, aluminum oxide, iron oxide, or the like may be used alone or in combination of two or more thereof.

Thus, the synthetic wood produced by the synthetic wood composition of the present invention can be very useful as interior and exterior materials for building, doors, door frames, flooring and moldings. In this case, the moldings may be, for example, ceiling molding, corner molding, door molding, decorative molding, baseboard, back box or picture frame.

Meanwhile, the synthetic wood composition and the synthetic wood of the present invention may be prepared by methods generally used in the art, such as coextrusion and general extrusion. Specific examples may be produced by the following manufacturing method, but is not limited thereto.

First, polypropylene, high density polyethylene resin, wood flour, lime, coconut shells and / or stems, pineapple shells and / or stems, boll stems and kaolin are introduced into a blender and stirred. At this time, the stirring temperature and time may be appropriately determined by those skilled in the art according to the type, size, thickness, etc. of the product to be produced, for example, it may be stirred for 2 to 10 minutes at a temperature of 60 to 100 ℃. Here, since the content of the above components are described above, it is omitted.

Thereafter, additives such as coupling agents, internal / external lubricants, fillers, pigments, and the like are added, followed by stirring for 5 to 10 minutes at a predetermined condition, for example, a temperature of 50 to 100 ° C. to prepare a synthetic wood composition of the present invention. can do.

Subsequently, the synthetic wood composition is introduced into a pellet production extruder to prepare pellets. In more detail, the synthetic wood composition is introduced into a hopper of a pellet manufacturing extruder, and the heating temperature of the screw front part of the extruder 180 to 240 ° C, the heating temperature of the screw center part 170 to 200 ° C, and the heating temperature of the screw rear part 140 to 140 ° C. At 170 ° C., the composition of the synthetic wood is transferred to a pellet production mold to prepare pellets at a pellet production mold heating temperature of 140 to 180 ° C., and then the pellet is dried at room temperature.

Subsequently, the pellets are introduced into a base material extruder for synthetic wood to prepare synthetic wood. In more detail, the pellets are put into a hopper of an extruder for producing a base material of synthetic wood, and are conveyed to a first screw heating temperature of 180 to 240 ° C and a second screw heating temperature of 170 to 200 ° C of the extruder, After discharging the vacuum gas to the outside, the pellets were transferred to the substrate manufacturing mold at the third screw heating temperature of 140 to 170 ° C and the fourth screw heating temperature of 150 to 180 ° C, and synthesized at the substrate manufacturing mold heating temperature of 140 to 180 ° C. After extruding to the wood substrate, and then cooled in a cooling bath, it is cut by a cutter to prepare a base of synthetic wood.

Hereinafter, the present invention will be described in more detail through Examples and Experimental Examples. However, the following examples are intended to illustrate the present invention in more detail, and the scope of the present invention is not limited to the following examples and experimental examples.

[Examples and Comparative Examples: Preparation of Synthetic Wood Composition and Synthetic Wood]

PP (Korea Oil Industry Co., Ltd.), HDPE (Korea Oil Industry Co., Ltd.), wood flour, lime, coconut shell, pineapple peel, stalk, kaolin were added to the contents shown in Table 1 and stirred at 80 ° C. for 5 minutes. At this time, the wood powder, coconut shell, pineapple peel and heath of the hot air was used as the moisture content of about 3-5%. Thereafter, a coupling agent, an internal / external lubricant, a filler, and a pigment were added thereto, and stirred at a temperature of 70 ° C. for 7 minutes to prepare a synthetic wood composition. Subsequently, the synthetic wood composition was introduced into a hopper of a pellet manufacturing extruder, the screw front end temperature was 180 ° C., the central part temperature was 200 ° C., the rear part temperature was 170 ° C., the pellet was manufactured at a mold temperature of 180 ° C., and dried at room temperature. The pellets dried at room temperature were put into a base material extruder made of synthetic wood, and the first screw temperature was 190 ° C., the second screw temperature was 170 ° C., and the vacuum gas was discharged to the vacuum gas outlet, and the third screw temperature was 140 ° C., The 4th screw temperature was transferred to 180 degreeC, the extrusion was carried out in the 180 degreeC metal mold | die, the base material was cooled in the manufacturing cooling tank, and the synthetic wood was manufactured. On the other hand, for some wood flour and coconut shells, the pulverized product is first hot-air-dried at a water content of 5 to 10%, and then coated on the surface so that 30% (w / w) chitosan solution is evenly coated, and the water content is 2% or less. Pretreatment was used by drying the secondary hot air as much as possible.

a-1: maple, average particle size 80 mesh

a-2: maple, average particle size 50 mesh

a-3: maple, average particle size 120 mesh

a-4: maple, mean particle size 40 mesh

a-5: maple, average particle size 140 mesh

b-1: CaCO ₃ , average particle size 150 mesh

b-2: CaCO ₃ , average particle size 100 mesh

b-3: CaCO ₃ , average particle size 200 mesh

b-4: CaCO ₃ , average particle size 80 mesh

b-5: CaCO ₃ , average particle size 220 mesh

c-1: coconut shell powder, average particle size is 100 mesh

c-2: coconut shell powder, average particle size is 60 mesh

c-3: coconut shell powder, average particle size is 150 mesh

c-4: coconut shell powder, average particle size is 40 mesh

c-5: coconut shell powder, average particle size is 170 mesh

d-1: pineapple foil, average particle size 120 mesh

d-2: pineapple foil, average particle size 80 mesh

d-3: pineapple foil, average particle size 150 mesh

d-4: pineapple foil, average particle size 60 mesh

d-5: pineapple gourd, average particle size 170 mesh

e-1: bovine stem powder, average particle size 120 mesh

e-2: bovine stem powder, average particle size 80 mesh

e-3: bovine stem powder, average particle size 150 mesh

e-4: bovine stem powder, average particle size 60 mesh

e-5: bovine stem powder, average particle size 170 mesh

f-1: Kaolin, average particle size 150 mesh

f-2: kaolin, average particle size 100 mesh

f-3: Kaolin, average particle size 200 mesh

f-4: kaolin, average particle size 80 mesh

f-5: kaolin, average particle size 220 mesh

*: Pretreated with chitosan

Coupling Agent: Maleic Hydride

Inner / outer lubricants: Polyethylene oxide wax

Pigment: White Inorganic Pigment

Filler: Silica (particle size 3㎛)

[Test Example: Evaluation of Physical Properties of Synthetic Wood]

First, the test method for evaluating the properties of synthetic wood is shown in Table 2 below.

1) Property evaluation by composition

The physical properties of each synthetic wood obtained in Examples 1 to 8 and Comparative Examples 1 to 8 were evaluated, and the results are shown in Tables 3 and 4 below.

Referring to Tables 3 and 4, the compositions of Examples 1-8, including polypropylene, high density polyethylene, wood flour, lime with coconut shells, pineapple shells, shells and kaolin, in the specific composition ranges described herein, It can be seen that the excellent results in all physical properties than the composition of Comparative Examples 1 to 8. In particular, Example 7 and Example 8 using the wood powder pretreated with chitosan showed the best results, in the case of the synthetic wood obtained from these examples can be obtained at the same time beneficial effects on the human body, such as excellent antibacterial effect due to the chitosan It was expected to be.

In addition, the composition of the present invention was able to obtain a cost reduction effect of about 5 to 15% compared to the composition of the comparative example by using a predetermined amount of cheap lime, coconut shell, pineapple peel, etc. instead of wood powder. In addition, the composition of the embodiment showed a good strength distribution and easy to form and construction at the same time as the composition of the composition is well mixed compared to the composition of the comparative example.

2) Evaluation of physical properties according to the average particle size of each component

In addition, in order to find out the change in physical properties according to the average particle size of each component included in the composition of the present invention, in particular wood flour, lime, coconut shell, pineapple shell, etc., Examples 5, 9-11 and Comparative Examples 9-10 For each synthetic wood obtained in the evaluation of wood texture and appearance, bending strength, bending strength when wet, and the like are shown in Table 5 below.

As shown in Table 5, the compositions of the examples using the components having a range of particle sizes all showed much better results in all aspects of wood texture, strength and water absorption than the compositions of the comparative examples. In particular, the composition of Example 11 using wood powder pretreated with chitosan showed the best results.

Therefore, from these results, the preferred average particle size of each component is 50 to 120 mesh for wood flour, 100 to 200 mesh for lime, 60 to 150 mesh for coconut shell and the like, 80 to 150 mesh for pineapple shell and the like. , 칡 stem 80 to 150 mesh, and kaolin was confirmed to be 100 to 200 mesh.

Claims (4)

Regarding the total weight of the composition,
25 to 35 weight percent polypropylene;
5-10% by weight of high density polyethylene;
30 to 45 wt% of wood flour having an average particle size of 50 to 120 mesh;
10 to 20% by weight of lime having an average particle size of 100 to 200 mesh;
3 to 15% by weight of the shell or stem of the coconut, the average particle size of 60 to 150 mesh;
1 to 5% by weight of the peel or stem of the pineapple having an average particle size of 80 to 150 mesh;
0.1 to 5% by weight of stalk stem having an average particle size of 80 to 150 mesh; And
0.01 to 5% by weight of kaolin having an average particle size of 100 to 200 mesh,
At least one of the wood powder, coconut shell or stem, pineapple shell or stem, and stalk is pre-treated with chitosan.
delete The method according to claim 1,
Synthetic wood composition further comprises one or two or more additives selected from the group consisting of coupling agents, internal and external lubricants, fillers, pigments, antioxidants, light stabilizers, ultraviolet absorbers and far-infrared radiation materials.
Synthetic wood made of a synthetic wood composition according to claim 1 or 3.