KR101859142B1 - Anti fungal synthetic wood composition and preparing method thereof - Google Patents

Abstract

The present invention relates to a synthetic wood composition used as a structure material of a bench, stairs, etc., at a park or a trail, and a manufacturing method of synthetic wood using the same. More specifically, the synthetic wood composition comprises: a wood powder composition including wood powder and a UV absorbent; a raw material composition including a thermoplastic resin and a UV stabilizer; and an additive composition including a lubricant, a colorant, a binder, and a reinforcing agent. The wood powder composition further includes a wood preservative. The lubricant includes cuprous oxide (CuO_2) which is an inorganic anti-foulant and zinc pyrithione which is an organic anti-foulant. According to the present invention, a mold fungus is prevented from growing on the surface of synthetic wood to delay decomposition of wood powder or oxidization of a thermoplastic resin to improve weather resistance of synthetic wood. Also, its value as a landscaping material with elegant appearance can be increased.

Description

TECHNICAL FIELD The present invention relates to a synthetic wood composition having high mold resistance and an antifungal synthetic wood composition and a preparing method thereof.

The present invention relates to a synthetic wood composition used as a structural material such as a bench or a stairway such as a park or a hiking trail, and a method for producing synthetic wood using the synthetic wood composition. More particularly, The present invention relates to a synthetic wood composition excellent in mold resistance and capable of slowing the swelling of wood flour and a method for producing the same.

Wood is widely used as eco-friendly building interior and exterior materials such as flooring of buildings, interior doors, window frames and the like. Most of these woods are made of wood preservatives, which are processed by penetrating preservatives into natural wood.

However, such natural wood or wood preservative is excellent in workability, but is extremely weak in strength, easily deformed by external temperature change, moisture, impact, etc., and is not semi-permanent, There are disadvantages. In addition, in the case of the anticorrosive material, a large amount of environmentally harmful substances were released, thereby limiting the use thereof.

Therefore, synthetic wood which is formed by mixing synthetic resin and wood instead of natural wood or anticorrosive material as described above is widely used for outdoor stairs or decks.

The synthetic wood is produced by uniformly blending raw wood pulverized wood, thermoplastic synthetic resin and other additives, extruding and molding the mixture through a certain mold according to the use, and cutting and cutting the wood to suit the application such as the user's surface treatment not slipping It completes. Such synthetic wood has a texture similar to that of natural wood, and has advantages of high durability and abrasion resistance.

However, these synthetic woods have a disadvantage in that the fungus grows easily on the surface due to the pollen and the pine which are blown out in the spring and summer air, and the fungus reacts with the wood to cause dehydration, thereby deteriorating the weatherability of the synthetic wood. In addition, even if it is not in the spring or summer, when it is installed on a wet river, moss is accumulated on the surface of the synthetic wood, and the metabolic activity of the microorganism in the moss also causes the dehydration and oxidation of the thermoplastic resin.

Preceding documents for improving the antifouling property of such synthetic wood are as follows.

Korean Patent No. 10-1197000 discloses a coating material made of methyltrimethoxysilane, glycidoxypropyl trimethoxysilane and colloidal silica on the surface of a sound-absorbing plate made of synthetic wood To 15 占 퐉 to 25 占 퐉, thereby improving the antifouling property of the wood.

Korean Patent No. 10-1049096 proposes a preservation treatment method of wood in which wood is immersed in wood vinegar and subjected to surface treatment by rosin and the like, thereby preventing the contamination.

However, all of the above-mentioned prior art documents have improved the antifouling property by applying or coating the chemical composition on the surface of the wood, that is, the synthetic wood, and the antifouling performance through the surface treatment is remarkably decreased as the time passes. The appearance of the wood is deteriorated due to the detachment of the coating layer and the decorative value is lowered.

In Korean Patent No. 10-1570670, a powder obtained by mixing copper oxide (Cu ₂ O), which is an inorganic antifoaming agent, and zinc prithione, an organic antioxidant, with ethylenediamine acetic acid (EDTA) To improve the antifouling property.

However, when the organic and inorganic antifouling agent is mixed with ethylenediamine acetic acid, surface antifouling property is improved to some extent, but mold resistance is not improved sufficiently, resulting in boiling of wood powder.

KR 10-1197000 B1 KR 10-1049096 B1 KR 10-1570670 B1

Accordingly, it is an object of the present invention to solve the above-described problems of the conventional synthetic wood and to provide an antifouling agent effective for wood flour, thermoplastic resin, plant microorganism, and animal microorganism, To form a synthetic wood composition, and by using the synthetic wood composition to form a synthetic wood, the mold resistance of the synthetic wood is improved to improve the weather resistance.

According to an aspect of the present invention, there is provided a synthetic wood composition having high mold resistance, comprising: a wood powder composition comprising wood powder and a UV absorber; A raw material composition comprising a thermoplastic resin and a UV stabilizer; Wherein the lubricant is selected from the group consisting of copper oxide (Cu ₂ O), an inorganic antifouling agent, and pyridione zinc, an organic antifouling agent, and an additive composition comprising a lubricant, a colorant, a binder and a reinforcing agent, Zinc prithone).

The wood preservative is 3-iodo-2-propynylbutyl carbamate (IPBC), and the lubricant comprises copper oxide and pyridione zinc in a weight ratio of 1: 1 to 1.2 .

Wherein the wood-based antifouling agent comprises 3 to 7% by weight of a lubricant containing an antifouling agent, 3 to 5% by weight of a colorant, 1 to 3% by weight of a binder and 3 to 5% by weight of a reinforcing agent 3 To 5% by weight of a wood preservative, wherein the wood flour composition comprises 97 to 99.89% by weight of wood flour, 0.1 to 2% by weight of UV absorber and 0.01 to 1% by weight of wood preservative, % And a UV stabilizer in an amount of 0.3 to 0.5% by weight.

The present invention also provides a wood-based composition comprising wood powder, UV absorbent and wood preservative; A raw material composition comprising a thermoplastic resin and a UV stabilizer; And a binder; and extruding the mixture to prepare a composition in the form of a pellet; a raw material composition comprising a thermoplastic resin and a UV stabilizer; slush; coloring agent; Binder; And a reinforcing agent are mixed and extruded to prepare a pellet-like composition, heating and stirring the two pellet-shaped compositions at a temperature of 210 to 270 ° C, molding the heated and stirred composition Wherein the lubricant comprises copper oxide (Cu ₂ O), which is an antifouling agent, and zinc prithone, which is an organic antifouling agent.

According to the present invention, it is possible to prevent the growth of fungus on the surface of the synthetic wood and to slow the oxidation of the wood powder or the thermoplastic resin, thereby improving the weatherability of the synthetic wood. In addition, there is an advantage that the value as landscape landscaping material can be enhanced.

Fig. 1 is a test report showing the results of Example 1 according to Test Example 1. Fig.
Fig. 2 is a test report showing the results of Comparative Example 1 according to Test Example 1. Fig.

Hereinafter, the present invention will be described in detail.

Conventional synthetic wood has excellent physical properties and durability, so it is being applied to trails, deck roads, ecological parks and observation decks in place of natural wood or barrier wood. However, these synthetic woods have a disadvantage in that the fungi easily reproduce on the surface, causing the wood flour to be worn out, and thus the value as a landscape material is deteriorated when used for a long time.

Accordingly, the present invention improves the mold resistance of synthetic wood to prevent wood wool, thereby improving the weatherability and enhancing the value as a landscape gardening material. To this end, the present invention uses an antifouling agent that interferes with the metabolism of animals and an antifouling agent that hinders the metabolism of plants, and uses a wood preservative to prevent wood chips from forming.

That is, conventionally, surface and oil contamination is prevented by mixing an organic and an organic antifouling agent with EDTA to form chelate copper and chelate zinc. However, the present invention can provide a microorganism, that is, a mold To inhibit the growth of bacteria.

Hereinafter, the synthetic wood composition according to the present invention will be described.

The highly moldy synthetic wood composition of the present invention comprises a wood flour composition comprising wood powder and a UV absorber; A raw material composition comprising a thermoplastic resin and a UV stabilizer; Wherein the lubricant is selected from the group consisting of copper oxide (Cu ₂ O), an inorganic antifouling agent, and pyridione zinc, an organic antifouling agent, and an additive composition comprising a lubricant, a colorant, a binder and a reinforcing agent, Zinc prithone).

The wood flour composition of the present invention comprises wood powder, UV absorber and wood preservative.

The wood flour may be produced by shredding recycled materials such as chips, shaving, and sawdust, or may be manufactured by shredding new wood that is not a recycled product. In the present invention, the woodywood having a fiber length of 1.0 to 1.2 mm is preferably pulverized to a size of 30 to 100 meshes. The reason for using the above-mentioned softwood logs is that coniferous trees such as pine trees have relatively higher specific gravity than the broad-leaved trees and can produce particles uniformly. This is because broad-leaved trees have a relatively larger fibrous structure than conifers, and the interstitials have a negative impact on the strength of the synthetic wood because of the more sex-friendly nature compared to the conifers. When the particle size of the wood powder is more than 30 mesh, the dimensional stability and elastic modulus of the synthetic wood are lowered. When the particle size of the wood powder is less than 100 mesh, the wood particles may become difficult to be mixed together due to too small wood powder. The wood powder preferably has a length to diameter ratio of 3: 1 to 5: 1. If the wood powder is out of this ratio, the physical properties of the synthetic wood may not be good.

The wood powder should be dried to a moisture content of 1 to 2% by weight, because moisture affects the surface properties of the synthetic wood, the defect rate, and the like. That is, when the moisture content of the wood powder exceeds 2%, moisture is evaporated during the molding of the synthetic wood, causing air bubbles and the like, adversely affecting the surface properties of the synthetic wood, weakening the bonding force with the resin, And the like. The wood powder is dried at room temperature, that is, through natural drying to have a water content of about 6 to 10%, and dried again using a drier, preferably a hot air drier to lower the water content of the wood powder to 1 to 2% . This is so as not to increase the manufacturing cost in the production of wood flour but to sufficiently reduce the moisture content of the wood flour so as not to affect the surface properties and defective rate of the synthetic wood.

The UV absorbers prevent degradation of mechanical properties of wood powder by ultraviolet rays, discoloration and the like. The UV absorber may be selected from a variety of products known in the art to which the UV absorber is exemplified by 2- (2-hydroxy-5-methylphenyl) benzotriazole, 2- (2-hydroxy- (2-hydroxy-3,5-ditertiary-butylphenyl) -5-chlorobenzotriazole may be used. .

The wood preservative inhibits the occurrence of contamination of wood flour by microorganisms and the like, thereby enhancing the mold resistance of the synthetic wood. Conventionally, when antifouling agent alone is applied to a synthetic wood, the degree of corruption in the synthetic wood is somewhat prevented. However, since the synthetic wood surface is contaminated by microorganisms and the microbes can not be sufficiently prevented from breeding, To prevent microbial contamination. As the wood preservative, 3-iodo-2-propynylbutyl carbamate (IPBC) is preferably used. That is, conventional wood preservatives do not use a wood preservative, which causes disadvantages in that the wood is brittle. Accordingly, the present invention overcomes these disadvantages through the wood preservative IPBC.

It is also preferable that the wood flour composition is composed of 97 to 99.89% by weight of wood powder, 0.1 to 2% by weight of UV absorber and 0.01 to 1% by weight of wood preservative.

If the content of the wood flour composition is too low, the function as a wood is deteriorated and the plasticity becomes too strong. Conversely, when the content of the wood flour composition is too high, the thermoplastic resin The content of the water-soluble polymer is reduced.

The raw material composition includes a thermoplastic resin and a UV stabilizer. The thermoplastic resin may be at least one selected from the group consisting of polyethylene (PE), polyvinyl chloride (PVC), and polypropylene (PP) as a plastic raw material for producing synthetic wood.

The UV stabilizer enhances stability by ultraviolet rays and blocks ultraviolet rays from the sunlight to prevent discoloration of the thermoplastic resin. In the present invention, the type of the UV stabilizer is not limited. Various types of UV stabilizers known in the art can be used. For example, salicylate, benzophenone, benzotriazole, cyanoacrylate , Benzoate-based, triazine-based, and amine-based ultraviolet stabilizers.

The raw material composition is preferably composed of 99.5 to 99.7% by weight of a thermoplastic resin and 0.3 to 0.5% by weight of a UV stabilizer.

The raw material composition is preferably contained in the synthetic wood composition in an amount of 25 to 35% by weight. When the content is less than 25% by weight, durability and the like are poor. When the content is more than 35% by weight, characteristics of the wood are decreased.

The synthetic wood compositions of the present invention use lubricants, reinforcing agents, colorants and binders as additives.

The lubricant includes an antifouling agent and an antifouling agent to prevent the growth of vegetable fungi and animal fungi. As such an antifouling agent, it is preferable to use a powder obtained by mixing copper oxide (Cu ₂ O), which is an antifouling agent, and Zinc prithione, an organic antifouling agent, in a weight ratio of 1: 1 to 1.2. At this time, the particle size of the powder is not limited. The lubricant not only serves to increase the mold resistance of the synthetic wood but also serves to increase the dispersion of the wood powder during the processing of the synthetic wood. It is possible to further include a general lubricant such as antifouling agent and paraffin wax, Do.

The lubricant is preferably contained in the synthetic wood composition in an amount of 3 to 7% by weight. When the content of the lubricant is less than 3% by weight, it is difficult to improve mold resistance and function as a lubricant. When the content of the lubricant is more than 7% by weight, to be. Most preferably, 1 to 3% by weight of the composition contains the organic antifouling agent and the antifouling agent, and the remaining 2 to 4% by weight of the lubricant is a general lubricant.

The coloring agent is used for imparting color stability, and is used for enhancing the appearance such as wood and resistance to ultraviolet rays. In the present invention, the kind of the colorant is not limited, and a pigment including iron oxide, which is exemplified as inorganic, may be used.

When the amount of the coloring agent is less than 3% by weight, the function as a coloring agent is weak so that discoloration from the wood can not be prevented. When the amount of the coloring agent is more than 5% by weight It is possible to reduce the physical properties of the synthetic wood.

The binder is used to improve the bonding force between plastics, i.e., thermoplastic resin and wood. In principle, wood flakes exhibit a hydrophilic polarity, and plastics have a hydrophobic non-polarity, so the binding strength of the two substances is weak. Thus, the interaction of wood with plastics is greatly improved by the addition of a binder, with new chemical bonds at the interface between the two materials. As such a binder, maleated poly-propylene (MAPP) or the like can be used. The binder enhances the modulus of rupture (MOR) and modulus of elasticity (MOE) of the synthetic deck and assists in dimensional stability, impact strength and dispersal of wood flour. When the amount of the binder is less than 1% by weight, the bonding strength can not be improved. When the amount of the binder is more than 3% by weight, the amount of the binder is excessive, Can be reduced.

The reinforcing agent is used for improving long-term deformation by impact strength, bending strength, thermal deformation temperature and load, and is also used for improvement of lubricity and moisture absorption of wood powder. In the present invention, such a reinforcing agent may be a mixture of titanium dioxide and calcium carbonate, more preferably a mixture of titanium dioxide and calcium carbonate in a weight ratio of 1: 1. Such a reinforcing agent, together with the antifouling agent, To thereby improve the performance of the antifouling agent. At this time, the particle size of the reinforcing agent is not limited, and it is sufficient if it is about 10 nm to 30 탆. The reinforcing agent may be used in an amount of 3 to 5% by weight in the synthetic wood composition. If the reinforcing agent is less than 3% by weight, improvement of physical properties and water absorption of the wood fiber are difficult, and if it exceeds 5% by weight, Because.

In addition to the above-mentioned additives, the synthetic wood composition of the present invention may further contain an antioxidant, a salt resistance, a heat stabilizer, and the like used in the production of general synthetic wood. It can be used irrespective of its kind.

The synthetic wood composition having the above structure is excellent in mold resistance because it is difficult for the microorganism to propagate on the surface as well as on the surface thereof, so that it is advantageous in that the appearance of the wood is not oxidized and the appearance of the thermoplastic resin does not occur for a long period of time.

In addition, although not mentioned separately in the description of the composition, when the additive is mixed with the wood flour composition and the raw material composition, the additive is prepared by master batch using the raw material composition and then mixed therewith. And therefore, a description thereof has been omitted.

Hereinafter, a method for producing a synthetic wood according to the present invention will be described. In the following description of the production process, the description of the synthetic wood composition is omitted.

The method for producing a synthetic wood according to the present invention comprises: a wood flour composition comprising wood powder, a UV absorber and a wood preservative; A raw material composition comprising a thermoplastic resin and a UV stabilizer; And a binder; and extruding the mixture to prepare a composition in the form of a pellet; a raw material composition comprising a thermoplastic resin and a UV stabilizer; slush; coloring agent; Binder; And a reinforcing agent are mixed and extruded to prepare a pellet-like composition, heating and stirring the two pellet-shaped compositions at a temperature of 210 to 270 ° C, molding the heated and stirred composition .

Wood powder compositions, raw material compositions, binders, lubricants, Reinforcing agent Weighed  step.

First, 50 to 65% by weight of a wood flour composition, 25 to 35% by weight of a raw material composition, 3 to 7% by weight of an organic antifouling agent and a lubricant containing an antifouling agent, 3 to 5% by weight of a colorant, Each material is weighed at a ratio of 3 to 5% by weight. At this time, a part of the raw material composition is mixed with a lubricant, a colorant, a binder and a reinforcing agent to prepare a pellet-shaped masterbatch, and the remainder is mixed with a wood flour composition and a binder to prepare a pellet- . Since the binder is also used for both master batches, it is appropriately distributed and used.

Wood flour compositions including wood flour, UV absorbers and wood preservatives; A raw material composition comprising a thermoplastic resin and a UV stabilizer; And Binder  Mixing, and extruding to prepare a composition in the form of pellets.

Next, as described above, wood flour compositions comprising wood powder, UV absorbers and wood preservatives; A raw material composition comprising a thermoplastic resin and a UV stabilizer; And a binder are mixed and extruded to prepare a composition in the form of pellets. At this time, the size of the pellet may be about 0.5 to 7 mm, but it is not limited thereto. Here, extrusion conditions and methods of the pellets are in accordance with known methods.

A raw material composition comprising a thermoplastic resin and a UV stabilizer; slush; coloring agent; Binder; And Reinforcing agent;  Mixing, and extruding to prepare a composition in the form of pellets.

Next, a lubricant, a coloring agent, a binder and a reinforcing agent, which are additives, are mixed with a raw material composition and extruded to prepare a composition in the form of a pellet. Here, it is a matter of course that the raw material composition is the same as that used above. The preparation of the pellets in this step also follows a known method, and the size of the pellets may be about 0.1 to 5 mm, but is not limited thereto.

In the present invention, the two steps of preparing the pellet-like composition are separate steps, the order of which is irrelevant, and any step may be performed first.

The two pelletized compositions were heated to a temperature of 210-270 < 0 > C, Stirring  step.

Next, the two pellet-shaped compositions are sufficiently stirred in an extruder. At this time, the temperature is preferably 210 to 270 DEG C, and the synthetic wood composition, which is gradually unified through the screw in the extrusion molding machine, is transferred to the die. If the temperature is less than 210 ° C, sufficient melting of the two compositions is difficult and uniform mixing is difficult. If the temperature exceeds 270 ° C, discoloration or deterioration of the wood may occur. The heating and stirring time are not limited, and are subject to conditions for molding with a conventional extrusion molding machine.

The heating, Stirred  Molding the composition.

Next, the synthetic wood composition, which is gradually unified through the screw, is transferred to a mold such as a floor material, a railing material, a column material, etc., according to the use as described above. Such a molding method is well known in the field to which this technique belongs, and thus a detailed description thereof will be omitted.

That is, when the synthetic wood composition of the present invention is sufficiently melted and stirred and molded, the oil, the antifouling agent and the wood preservative contained in the composition exhibit resistance to copper and plant microorganisms, It is prevented from propagating and has excellent weather resistance.

Hereinafter, specific examples of the present invention will be described in detail.

(Example)

A synthetic wood having a composition ratio of 60% by weight of a wood-based powder composition, 30% by weight of a raw material composition, 3% by weight of a lubricant, 3% by weight of a reinforcing agent, 3% by weight of a colorant and 1%

Here, as the wood powder composition, 99.1% by weight of wood powder and 0.8% by weight of a UV absorber and 0.1% by weight of wood preservative were used. As the raw material composition, 0.5% by weight of UV stabilizer was mixed with 99.5% by weight of thermoplastic resin PP Respectively.

At this time, the wood powder used was a woody wood powder having a fiber length of 1.0 to 1.2 mm, a size of 30-100 mesh, a length-to-diameter ratio of 3: 1 to 5: 1, and a water content of 2% , 2- (2-hydroxy-5-methylphenyl) benzotriazole as a UV absorber, an amine stabilizer as a UV stabilizer, and IPBC as a wood preservative. As the lubricant, 1% by weight of a mixture of copper oxide and pyridione zinc in a weight ratio of 1: 1.2 and 2% by weight of paraffin wax were used. As the colorant, pigments composed of iron oxide were used. Calcium were mixed in a weight ratio of 1: 1, and as the binder, maleic polypropylene was used.

A part of the lubricant, the colorant, the reinforcing agent and the binder may be prepared by preparing a pellet-shaped master batch having a size of 0.1 to 5 mm by using a raw material composition and then kneading the master batch in a size of 0.5 to 7 mm And the mixture was heated at 210 to 270 ° C for 30 minutes and stirred. The mixture was extruded into an extruder to produce a continuous plate-type synthetic wood. After cooling the synthetic wood, the surface of the synthetic wood was smoothly processed.

(Comparative Example 1)

As Comparative Example 1, synthetic wood was prepared in the same manner as in Example 1 except that 99.2% by weight of wood powder and 0.8% by weight of UV absorber were mixed, and only 3% by weight of paraffin wax was used as a lubricant .

(Test Example 1)

The synthetic wood of Example 1 and the synthetic wood of Comparative Example 1 were tested for mold resistance. The fungus resistance test was conducted by the Korean Institute of Construction & Life Testing and was tested by the method of ASTM G 21-15.

As the strains, Aspergillus niger ATCC 9642, Penicillium pinophilum ATCC 11797, Chaetomium globosum ATCC 6205, Gliocladium virens ATCC 9645 and Aureobasidium pullulans ATCC 15233 were used as the strains.

The results are shown in Table 1 below and Figs. 1 and 2.

Results of Test Example 1. Test Items
The duration of the culture test (after 4 weeks) Test Methods
Example 1 Comparative Example 1 Antifungal test
0 4
ASTM G 21-15
* 0: No growth of hypha is recognized in the inoculated part of the test specimen.
4: The area of the mycelial growth area recognized in the inoculated part of the test specimen is 60% or more of the total area.

As can be seen from Table 1 and FIG. 1 and FIG. 2, in Example 1 according to the present invention, no growth of hyphae was observed at 4 weeks, whereas Comparative Example 1 showed that at least 60% The mycelium was developed, and it was confirmed that the synthetic wood of the present invention had excellent mold resistance.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the same is by way of illustration and example only and is not to be construed as limiting the scope of the present invention.

Accordingly, the actual scope of the present invention will be defined by the appended claims and their equivalents.

Claims (5)

A wood flour composition comprising wood powder and a UV absorber;
A raw material composition comprising a thermoplastic resin and a UV stabilizer;
An additive composition comprising a lubricant, a colorant, a binder and a reinforcing agent,
Wherein the wood flour composition further comprises a wood preservative,
The wood preservative is 3-iodo-2-propynylbutyl carbamate (IPBC)
The lubricant contains copper oxide (Cu ₂ O), which is an antifouling agent, and Zinc prithone, which is an organic antifouling agent, at a weight ratio of 1: 1 to 1.2,
Wherein the wood-based antifouling agent comprises 3 to 7% by weight of a lubricant containing an antifouling agent, 3 to 5% by weight of a colorant, 1 to 3% by weight of a binder and 3 to 5% by weight of a reinforcing agent 3 To 5% by weight,
Said wood flour composition comprising 97 to 99.89% by weight of wood powder, 0.1 to 2% by weight of UV absorber and 0.01 to 1% by weight of wood preservative,
Wherein the raw material composition comprises 99.5 to 99.7% by weight of a thermoplastic resin and 0.3 to 0.5% by weight of a UV stabilizer.
delete delete Wood flour compositions including wood flour, UV absorbers and wood preservatives; A raw material composition comprising a thermoplastic resin and a UV stabilizer; And a binder; and extruding the mixture to prepare a composition in the form of a pellet;
A raw material composition comprising a thermoplastic resin and a UV stabilizer; slush; coloring agent; Binder; And a reinforcing agent, and extruding them to prepare a composition in the form of pellets,
Heating and agitating the two pelletized compositions at a temperature of 210 to 270 DEG C,
And molding the heated, stirred composition,
The wood preservative is 3-iodo-2-propynyl butylcarbamic acid (IPBC)
The lubricant contains copper oxide (Cu ₂ O), which is an antifouling agent, and Zinc prithone, which is an organic antifouling agent, at a weight ratio of 1: 1 to 1.2,
Wherein the wood-based antifouling agent comprises 3 to 7% by weight of a lubricant containing an antifouling agent, 3 to 5% by weight of a colorant, 1 to 3% by weight of a binder and 3 to 5% by weight of a reinforcing agent 3 To 5% by weight,
Said wood flour composition comprising 97 to 99.89% by weight of wood powder, 0.1 to 2% by weight of UV absorber and 0.01 to 1% by weight of wood preservative,
Wherein the raw material composition comprises 99.5 to 99.7% by weight of a thermoplastic resin and 0.3 to 0.5% by weight of a UV stabilizer. delete

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