KR101559530B1

KR101559530B1 - Synthetic wood composition and preparing method thereof

Info

Publication number: KR101559530B1
Application number: KR1020150066487A
Authority: KR
Inventors: 강수현; 정영석; 오무송; 김성환; 하영준
Original assignee: (주)지케이우드
Priority date: 2015-05-13
Filing date: 2015-05-13
Publication date: 2015-10-15

Abstract

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 wood powder composition for wood and a UV absorbent; A raw material composition comprising a thermoplastic resin; A lubricant, a colorant, a binder and a reinforcing agent, wherein the lubricant is a fine hollow powder of ceramics, and a synthetic wood composition.
According to the present invention, by improving the heat exchange performance of the synthetic wood, it is possible to reduce the surface temperature of the synthetic deck by 20 ° C or more in the summer, to enable safe walking and contact, and to prevent condensation by the heat- There is an advantage of improving walking stability. In addition, by increasing the thermal stability, there is an advantage that various accidents caused by the expansion or contraction of the fixed structure due to repeated expansion and contraction due to the temperature change can be prevented.

Description

TECHNICAL FIELD The present invention relates to a synthetic wood composition and a method for producing the synthetic wood using the synthetic wood composition.

The present invention relates to a synthetic wood composition used as a structural material for a bench or a stairway such as a park or a mountain trail, and a method for producing synthetic wood using the synthetic wood composition. More particularly, And preventing slip accidents due to freezing in winter, and a process for producing synthetic wood using the synthetic wood composition.

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 a natural wood or wood preservative has excellent workability, but it is extremely weak in strength, easily deformed by external temperature change, moisture and impact, is not semi-permanent, and has a disadvantage that natural wood is obtained by damaging the forest . 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 has a panel by injecting a filler synthesized from wood pulverized wood and additives such as thermosetting synthetic resin, and heating and pressing. The natural wood veneer or vinyl veneer is bonded to the front surface of the panel, Completed. Such synthetic wood has a natural veneer texture, and has advantages of high durability and abrasion resistance.

However, such a synthetic wood has a poor heat stability, and deforms the shape to twist, thereby increasing the risk of accidents. Also, due to repeated shrinkage and expansion due to temperature changes, the fixed structure may be loosened or destroyed, Or discoloration of the ink. In addition, the synthetic wood deck installed in the outdoor such as the beach has a problem that the surface temperature of the summer deck rises to about 100 ° C, causing the barefoot swimmers to burn on the sole, and in the winter, There are disadvantages that threaten safety.

On the other hand, the following prior arts have been published for such synthetic wood.

Korean Patent Laid-Open No. 10-2012-0009762 discloses a wood powder composition comprising a wood powder composition obtained by mixing polyethylene and polypropylene, which are thermoplastic resins, or epoxy and phenol, which are thermosetting resins, with wood powder and wood powder binder, There is provided a process for producing an eco-friendly synthetic wood capable of realizing a natural wood pattern by mixing and melting the wood powder composition and the color master batch and extruding it by a metal mold.

Korean Patent No. 10-0978759 discloses a polyolefin resin composition comprising 25 to 30% by weight of a polyolefin resin, 60 to 70% by weight of wood powder or rice hull, 0.003 to 0.02% by weight of a coupling agent, 0.5 to 2% by weight of a wax for wood powder, By weight, and 0.5 to 10% by weight of a pigment, to provide a composition for producing an eco-friendly synthetic wood excellent in embossing.

Korean Patent No. 10-0983970 discloses a method for producing a wood pulp which comprises pulverizing a coniferous tree or a broad-leaved tree to a size of 20 to 50 mesh, drying the pulverized material to a weight of 0.1 to 5% The above-mentioned wood-based material and the above-mentioned wood-based material are mixed with polyethylene (PE), polyethylene terephthalate (PET), polypropylene (PP), sulfonated polystyrene (SPS) Adding a filler, a stabilizer, a lubricant, an impact modifier, a cellulosic fiber and a coupling agent to a group of compositions comprising a combination of diethylene glycol, microsilica and a flame retardant composition to prepare a composition; Kneading the composition in an extruder and then molding it into a composite material in a die, and an eco-friendly and flame-retardant synthetic wood composite material and its manufacture The proposed law.

However, none of the above prior arts have solved the problem of freezing due to a rise in the surface temperature of the synthetic wood or a drop in the surface temperature.

GB 10-2012-0009762 A KR 10-0978759 B1 KR 10-0983970 B1

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to solve the problems of the conventional synthetic wood, and a synthetic wood composition is prepared by mixing wood microfibers and titanium dioxide together with wood flour and thermoplastic resin, By forming the synthetic wood, the heat exchange performance of the synthetic wood is improved.

In order to accomplish the above object, the present invention provides a synthetic wood composition comprising a wood powder composition as a wood powder and a UV absorber; A raw material composition comprising a thermoplastic resin; An additive composition comprising a lubricant, a colorant, a binder and a reinforcing agent, wherein the lubricant comprises a powder of microscopic hollow spheres of ceramic.

The fine hollow powder of ceramics is characterized in that the main component is aluminosilicate and the particle size is 30 to 100 탆.

The reinforcing agent is a mixture of titanium dioxide (TiO ₂ ) and calcium carbonate (CaCO ₃ ).

The wood flour composition is prepared by adding 0.1 to 1 part by weight of an ultraviolet absorber to 100 parts by weight of a woodywood having a fiber length of 1.0 to 1.5 mm and adding 0.1 to 1 part by weight of a UV stabilizer to 100 parts by weight of the thermoplastic resin. .

The conifer wood powder is a dried wood powder having a size of 40 to 80 mesh, a length to diameter ratio of 3: 1 to 5: 1, and a moisture content of 1 to 2%.

Wherein the wood powder composition is 55 to 60 wt%, the raw material composition is 25 to 35 wt%, the lubricant is 1 to 3 wt%, the colorant is 3 to 5 wt%, the binder is 1 to 3 wt%, and the reinforcing agent is 4 to 6 wt%.

A method for producing a pellet-shaped composition, comprising the steps of: mixing a wood powder and a UV absorbent, a raw material composition comprising a thermoplastic resin, and a binder, and extruding the mixture to prepare a pellet-like composition; mixing the raw material composition, Comprising the steps of: preparing a composition in the form of a pellet; heating and stirring the two pelletized compositions at a temperature of 200 to 260 DEG C; and molding the heated and stirred composition, wherein the lubricant is a ceramic Of the fine hollow body powder.

The ceramic hollow micropowder powder is mainly composed of aluminosilicate, has a particle size of 30 to 100 μm, and the reinforcing agent is a mixture of titanium dioxide and calcium carbonate.

The wood powder composition is prepared by adding 0.1 to 1 part by weight of an absorbent to 100 parts by weight of a coniferous wood powder having a fiber length of 1.0 to 1.5 mm and the conifer wood powder having a size of 40 to 80mesh and a length to diameter ratio of 3: : 1, dried wood powder having a moisture content of 1 to 2%, and the raw material composition is characterized in that 0.1 to 1 part by weight of a uv stabilizer is added to 100 parts by weight of a thermoplastic resin.

The wood-based composition, the raw material composition, the lubricant, the coloring agent, the binder and the reinforcing agent may be selected from the group consisting of 55 to 60 wt% of a wood-based composition, 25 to 35 wt% of a raw material composition, 1 to 3 wt% of a lubricant, By weight, and 4 to 6% by weight of a reinforcing agent.

According to the present invention, by improving the heat exchange performance of the synthetic wood, it is possible to reduce the surface temperature of the synthetic deck by 20 ° C or more in the summer, to enable safe walking and contact, and to prevent condensation by the heat- There is an advantage of improving walking stability.

In addition, by increasing the thermal stability, there is an advantage that various accidents caused by the expansion or contraction of the fixed structure due to repeated expansion and contraction due to the temperature change can be prevented.

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, such synthetic wood has disadvantages in that weatherability, especially thermal stability, is deformed to cause warping of the shape, thereby increasing the risk of accidents or repeated expansion and contraction due to temperature changes, . In addition, there was a risk of burns due to a rapid increase in surface temperature during the summer, and in winter, the freezing phenomenon occurred due to the temperature drop and the walking stability was poor.

Accordingly, the present invention is intended to suppress the surface temperature change of the synthetic wood according to the change of the external temperature by securing the heat exchange performance and the thermal stability of the synthetic wood.

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

The synthetic wood composition of the present invention comprises a wood flour composition as a wood and a UV absorbent; A raw material composition comprising a thermoplastic resin; An additive composition comprising a lubricant, a colorant, a binder and a reinforcing agent, wherein the lubricant is a fine hollow powder of ceramic.

The wood flour composition of the present invention consists of a wood powder and a UV absorbent. 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, it is preferable to use as the wood powder, the conifer wood having a fiber length of 1.0 to 1.5 mm is pulverized to a size of 40 to 80 mesh. 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.

That is, in the case of hardwoods, the low specific gravity and the relatively long fiber length cause the seedling to be inferior to the conifer, and the bending strength of the synthetic wood is not good. Therefore, in the present invention, the coniferwood having a fiber length of 1.0 to 1.5 mm To 80 mesh size. If the particle size of the wood powder is larger than 40 mesh, the dimensional stability and the elastic modulus of the synthetic wood are lowered. If the particle size of the wood particle is smaller than 80 mesh, the wood particles may clump 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.

In the present invention, the method of drying the wood powder is not limited. Various methods known in the art to which the present invention pertains can be applied as long as the water content of the wood powder can be reduced to 1 to 2%, which is usually about 8%.

In addition, it is preferable that a UV absorber is added to the wood powder. By mixing the UV absorber, it is possible to prevent deterioration of mechanical properties due to 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. And it is preferable to add about 0.1 to 1 part by weight of UV absorber to 100 parts by weight of wood flour.

If the content of the wood flour composition is too low, the function as the wood is deteriorated and the plasticity becomes too strong. On the other hand, when the content of the wood flour composition is too high, the wood flour is relatively thermoplastic resin The content is preferably from 55 to 60% by weight.

The raw material composition comprising the thermoplastic resin includes at least one thermoplastic resin selected from the group consisting of polyethylene (PE), polyvinyl chloride (PVC) and polypropylene (PP) as a plastic raw material for producing synthetic wood. More preferably, such a raw material composition is prepared by adding 0.1 to 1 part by weight of a UV stabilizer to 100 parts by weight of a thermoplastic resin, and enhances stability by ultraviolet rays by using a UV stabilizer. That is, the UV stabilizer is to block ultraviolet rays from the sunlight to prevent discoloration of the thermoplastic resin. In the present invention, the kind of the above-mentioned uvy stabilizer is not limited, and various kinds of known ones in the art can be applied. For example, salicylate, benzophenone, benzotriazole, cyanoacrylate , Benzoate-based, triazine-based, and amine-based ultraviolet stabilizers.

If the content of the raw material composition is less than 25% by weight, durability and the like become poor. When the content of the raw material composition is more than 35% by weight, 25 to 35% by weight.

In the present invention, lubricants, reinforcing agents, coloring agents and binders are used as additives.

A characteristic feature of the additive in the present invention is that the fine hollow powder of ceramic is contained in the lubricant. The lubricant is used to increase the dispersion of wood powder during the processing of synthetic wood, and the surface properties of the synthetic wood are greatly improved by using the lubricant because the raw material composition containing the thermoplastic resin is relatively viscous at high temperatures. Particularly, in the present invention, not only the dispersibility of wood powder is improved but also the heat exchange property of the surface of the synthetic wood is increased to improve the heat insulating property and the heat shielding property. In addition, as the lubricant, paraffin wax, which is a general lubricant, may be used together with the micro hollow powder of ceramics, but the present invention is not limited thereto.

More specifically, the ceramic hollow micropowder powder has a main component of aluminosilicate and a particle size of 30 to 100 μm. The aluminosilicate has a thermal conductivity of 0.1 W / m / K, It has proven its effect on thermal stability and insulation. That is, the fine hollow powder of the ceramic gives heat exchangeability to the synthetic wood when the synthetic wood is molded. Especially, it radiates radiant heat of infrared ray which is located on the surface and reflects the solar heat, It prevents surface temperature rise of synthetic wood. Further, even when the outside temperature in winter is lowered, condensation is prevented from occurring due to heat accumulation of the fine hollow powder.

In addition, since the fine hollow powder of ceramics has an excellent thermal stability, deformation due to heat can be prevented and shrinkage / expansion ratio can be largely reduced, so that the fixing structure of the facility can be prevented from being loosened or broken. It is possible not only to prevent various unexpected accidents that may occur when the fixed structure is loosened or destroyed,

An effect of improving the anti-slip performance can be obtained.

In addition, the fine hollow powder of ceramic has a melting point as high as about 1200 ° C. to 1800 ° C. to improve the flame retardancy of the product.

It is preferable that the fine hollow powder of ceramics as the lubricant is used in an amount of 1 to 3% by weight in the synthetic wood composition. When the amount is less than 1% by weight, it is difficult to secure heat exchange property. And the cost is increased.

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 may include not only the aforementioned function but also the micro- Together, they form a dense structure and serve to further improve the thermal stability and heat exchange. 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 4 to 6% by weight in the synthetic wood composition. If the reinforcing agent is less than 4% by weight, improvement of physical properties and moisture absorption of the wood fiber are difficult. If the reinforcing agent is more than 6% by weight, Because.

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 type of the colorant is not limited, and a pigment made of iron oxide, which is an example of the inorganic pigment, may be used.

When the amount of the coloring agent is less than 3% by weight, the function as a coloring agent is weak and it is impossible to prevent discoloration from the wood. 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.

The binder is preferably used in an amount of 1 to 3% by weight in the synthetic wood composition. If the amount is less than 1% by weight, the bonding strength can not be improved. If the amount is more than 3% by weight, Can be reduced.

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-mentioned structure is excellent in heat exchange property and thermal stability, so that the temperature change of the surface of the synthetic wood according to the external temperature is small and slip is also prevented, so that it can be used as synthetic wood stably.

In the meantime, when the additive is mixed with the wood flour composition and the raw material composition, the additive is prepared in the master batch using the raw material composition and mixed therewith. However, 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.

Weighing the wood flour composition, the raw material composition, the binder, the lubricant, the colorant and the reinforcing agent.

First, each material was mixed in a ratio of 55 to 60% by weight of a wood-based resin composition, 25 to 35% by weight of a raw material composition, 1 to 3% by weight of a lubricant, 3 to 5% by weight of a colorant, 1 to 3% by weight of a binder and 4 to 6% . At this time, a part of the raw material composition is mixed with a lubricant, a colorant and a reinforcing agent to prepare a master batch in the form of pellets, and the remainder is mixed with a wood flour composition and a binder to prepare a composition in the form of pellets.

A step of mixing a wood flour and a wood flour as a UV absorber, a raw material composition containing a thermoplastic resin and a binder, and extruding the mixture to prepare a pellet-shaped composition.

First, as described above, a wood-based composition serving as a wood and an ultraviolet absorber, a raw material composition containing a thermoplastic resin, and a binder are mixed and extruded to prepare a composition in the form of a pellet. At this time, the size of the pellet may be about 3 to 10 mm, but the present invention is not limited thereto. Here, extrusion conditions and methods of the pellets are in accordance with known methods.

Mixing a raw material composition, a lubricant, a colorant, and a reinforcing agent, and extruding the mixture to prepare a composition in the form of a pellet.

Next, a lubricant, a colorant, and a reinforcing agent, which are additives, are mixed with the raw material composition and extruded to prepare a composition in the form of a pellet. The preparation of the pellets in this step also follows a known method, and the size of the pellets may be about 0.5 to 5 mm, but is not limited thereto.

Heating and agitating the two pelletized compositions at a temperature of 200 to 260 캜.

Next, the two pellet-form compositions are put into a molding machine and heated and stirred at a temperature of 200 to 260 ° C. If the heating temperature is lower than 200 ° C., it is difficult to uniformly mix the two compositions, and when the heating temperature is higher than 260 ° C., discoloration or deterioration of the wood may occur. At this time, the heating and stirring time are not limited, and the conditions for molding with an ordinary extrusion molding machine, a compression molding machine, and an injection molding machine are used.

Molding the heated and stirred composition.

Next, the heated and stirred composition is molded. At this time, various methods such as extrusion, injection molding and compression molding can be applied to the molding method, and these molding methods are well known in the field to which this technique belongs, and therefore, detailed description thereof will be omitted.

That is, when the synthetic wood composition of the present invention is sufficiently melt-agitated and molded, the micro hollow powder of ceramic contained in the composition and the synthetic wood in which titanium dioxide and calcium carbonate are molded improve the heat exchange property and thermal stability. Therefore, it is possible to use more saferly by reducing the surface temperature of synthetic wood which is higher than 100 ° C in summer by more than 15 ~ 20 ° C, by using the synthetic wood as a heat insulating function. In winter, .

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

(Example)

Synthetic wood having the composition ratios shown in Table 1 below was molded.

Mixing ratios of the Examples. (% By weight) division
Wood flour composition Raw material composition additive Reinforcing agent slush coloring agent Binder Example 1 59 25 6 3 4 3 Example 2 56 35 4 One 3 One

As the wood powder composition, 100 parts by weight of wood powder and 0.5 part by weight of UV absorber were used. As the raw material composition, 100 parts by weight of thermoplastic resin PP was mixed with 0.5 part by weight of UV stabilizer. The wood powder used herein was coniferous wood powder having a fiber length of 1.0 to 1.5 mm, a size of 40 to 80 mesh, a length to diameter ratio of 3: 1 to 5: 1, and a moisture content of 2% 2- (2-hydroxy-5-methylphenyl) benzotriazole as the UV absorber and an amine stabilizer as the UV stabilizer. As the lubricant, a ceramic hollow micropowder powder having a particle size of 30 to 100 占 퐉 and a main component of aluminosilicate was used as a lubricant, and a mixture of titanium dioxide and calcium carbonate in a weight ratio of 1: A pigment made of iron oxide, and a maleic polypropylene as a binder.

In addition, the reinforcing agent, the lubricant, and the colorant are prepared by preparing a pellet-shaped master batch using a raw material composition, mixing the mixture with a pellet-shaped composition obtained by mixing a wood flour composition, a raw material composition and a binder, , Stirred for 30 minutes, and then extruded into an extruder to produce continuous plate-type synthetic wood. After cooling the synthetic wood, the surface of the synthetic wood was smoothly processed.

(Comparative Example)

Synthetic wood was produced in the same manner as in Examples 1 and 2, and paraffin wax was used as a lubricant.

The linear thermal expansion coefficient (1 / 占 폚) of the above Examples and Comparative Examples was measured and the results are shown in Table 2 below. The linear thermal expansion coefficient was measured according to the linear thermal expansion coefficient measurement method of KS M 3060 plastic.

Results of measurement of the coefficient of linear thermal expansion of Examples and Comparative Examples. division The coefficient of linear thermal expansion (1 / 캜) Example 1 1.5 x 10 ^-5 Example 2 1.6 × 10 ^-5 Comparative Example 1 2.8 x 10 ^-5 Comparative Example 2 2.8 x 10 ^-5

As can be seen from the above Table 2, the synthetic wood according to the present invention has an effect of significantly improving the weather resistance, that is, the thermal stability according to the temperature change, as compared with Comparative Examples 1 and 2.

The surface temperature of the synthetic wood was measured while irradiating the synthetic wood of Examples 1 and 2 and Comparative Examples 1 and 2 with an infrared lamp for 2 hours. The test was performed using an infrared lamp light source of 500 W, lamp distance of 30 cm, and irradiation time of 2 hours.

The results are shown in Table 3 below.

Results of surface temperature measurements of Examples and Comparative Examples. division Initial (℃) 1 hour (℃) 2 hours (캜) Example 1 22.1 45.1 61.5 Example 2 22.2 46.3 62.2 Comparative Example 1 22.0 54.1 78.6 Comparative Example 2 22.1 56.5 79.1

As can be seen from the above Table 3, it was confirmed that the surface temperatures of Examples 1 and 2 were significantly lower than those of Comparative Examples 1 and 2.

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

A wood flour and a UV light absorbent; A raw material composition comprising a thermoplastic resin; A lubricant, a colorant, a binder and a reinforcing agent,
Wherein the lubricant comprises a fine hollow body powder of ceramic,
The wood flour composition is prepared by adding 0.1 to 1 part by weight of an ultraviolet absorber to 100 parts by weight of a woodywood having a fiber length of 1.0 to 1.5 mm,
The raw material composition is prepared by adding 0.1 to 1 part by weight of a UV stabilizer to 100 parts by weight of a thermoplastic resin,
Wherein the conifer wood powder is a dried wood powder having a size of 40 to 80 mesh, a length to diameter ratio of 3: 1 to 5: 1, and a water content of 1 to 2%.

The method according to claim 1,
Wherein the fine hollow powder of the ceramic contains an aluminosilicate component and has a particle size of 30 to 100 占 퐉.

The method according to claim 1,
Wherein the reinforcing agent is a mixture of titanium dioxide and calcium carbonate.

delete

The method according to claim 1,
Characterized in that the wood powder composition is 55 to 60 wt%, the raw material composition is 25 to 35 wt%, the lubricant is 1 to 3 wt%, the colorant is 3 to 5 wt%, the binder is 1 to 3 wt%, and the reinforcing agent is 4 to 6 wt% Synthetic wood composition.

Mixing a wood powder composition as a wood powder and a UV absorber, a raw material composition comprising a thermoplastic resin and a binder, and extruding the mixture to prepare a pelletized composition,
Mixing a raw material composition containing a thermoplastic resin, a lubricant, a colorant, and a reinforcing agent, and extruding the mixture to prepare a composition in the form of a pellet;
Heating and agitating the two pelletized compositions at a temperature of 200 to 260 DEG C,
And molding the heated, stirred composition,
Characterized in that the lubricant comprises fine hollow body powder of ceramic.

8. The method of claim 7,
The ceramic hollow micropowder powder contains an aluminosilicate component and has a particle size of 30 to 100 占 퐉,
Wherein the reinforcing agent is a mixture of titanium dioxide and calcium carbonate.

8. The method of claim 7,
The wood powder composition is prepared by adding 0.1 to 1 part by weight of an absorbent to 100 parts by weight of a coniferous wood powder having a fiber length of 1.0 to 1.5 mm and the conifer wood powder having a size of 40 to 80mesh and a length to diameter ratio of 3: : 1, a dried wood powder having a water content of 1 to 2%
Wherein the raw material composition is obtained by adding 0.1 to 1 part by weight of a uv stabilizer to 100 parts by weight of a thermoplastic resin.

8. The method of claim 7,
The wood-based composition, the raw material composition, the lubricant, the coloring agent, the binder and the reinforcing agent may be selected from the group consisting of 55 to 60 wt% of a wood-based composition, 25 to 35 wt% of a raw material composition, 1 to 3 wt% of a lubricant, By weight of a reinforcing agent, and 4 to 6% by weight of a reinforcing agent.