KR101046316B1 - Environmental-friendly artificial wood and method for manufacturing thereof - Google Patents

Abstract

PURPOSE: A environment-friendly anion synthetic lumber and a manufacturing method thereof are provided to prevent tensile strength, the impact strength, the flexural strength etc. since the synthetic lumber, which is from the use of anion-generation stone, includes no anion-generation stone inside. CONSTITUTION: The environment-friendly anion synthetic lumber and the manufacturing method thereof includes are as follows. The synthetic lumber is extruded by mixing the wood dust with resin and heating. The anion particle is sprayed pressurized before the synthetic lumber surface is frozen. In the synthetic lumber, the anion particle is fixed to the surface. The anion particle is tourmaline and the tourmaline particle is composed of the 95-99 parts by weight of tourmaline and the 1-5 parts by weight of lacquer extract.

Description

Eco-friendly anionic synthetic wood and its manufacturing method {ENVIRONMENTAL-FRIENDLY ARTIFICIAL WOOD AND METHOD FOR MANUFACTURING THEREOF}

The present invention relates to an environmentally friendly synthetic wood and a method for manufacturing the same, and more particularly to an environmentally friendly synthetic wood and a method for producing the anion is generated.

As described in Korean Patent No. 0025, generally synthetic wood is a wood-like product manufactured by a method of mixing wood flour and plastic to form a mixture and then injection or extrusion molding to have a similar appearance or properties to natural wood. Means. Such synthetic wood is a substitute material for natural wood, and the use rate is increasing every year, and a general manufacturing method is made by mixing various additives based on the method of mixing wood powder and plastic as above.

Plastics used in the conventional synthetic wood manufacturing method are high density or low density polyethylene (PE), polypropylene (PP), vinyl chloride (PVC), etc., and wood flour is usually made from recycled wood products, wood chips and sawdust. to be. In addition, the additives added in various ways in the production of the synthetic wood is added to vary the type and amount of additives according to the material, the production method, the end use of the product for forming the synthetic wood. For example, a blending agent is added to facilitate the adhesion and dispersion of the wood flour and plastic mixture, and a blocking agent is added so as not to interfere with the binding of the mixture, and to reduce the density of sunscreens, buffers and products that prevent the product from deteriorating. Foaming agent and the like can be added. However, the conventional synthetic wood produced by mixing wood flour and plastics and various additives as described above is difficult to improve the problem that the wood product is deteriorated in the properties of the material itself by bacteria and other microorganisms produced synthetic Because wood can be corroded and broken by biological attack, separate chemical treatments have to be performed to prevent corrosion and breakage of the synthetic wood. In particular, conventional preservatives used in the chemical treatment of synthetic wood as described above contain high heavy metal content that is not filtered, such as ACQ preservatives (copper alkyl ammonium compound-based wood preservatives) and CCA preservatives (arsenic copper compound preservatives). By using the preservative, the manufacturing method to increase the antibacterial and flame retardant effect of the synthetic wood through such chemical treatment has a problem that may adversely affect the human body of the user as well as the user using the manufactured synthetic wood. Accordingly, a method of mixing and using additives such as tetrabromobisphenol has been attempted. In this case, due to the large amount of synthetic organic materials such as tetrabrobisphenol, it is known that there is a problem contrary to the purpose of the synthetic wood used for environmentally friendly materials.

Korean Patent No. 928702 discloses a method of manufacturing a mixture of wood with jade or germanium, charcoal, ocher, magnesium oxide, calcium oxide, aluminum oxide, iron oxide, etc., which are far-infrared radiation materials capable of emitting far-infrared rays. . However, inorganic particles that are mixed with resins to emit far infrared rays cause degradation of impact, bending strength, tensile strength, etc. of synthetic wood, and require expensive additives such as polypropylene maleate to reinforce them. It is known. For example, Korean Patent No. 965627 discloses a method of mixing a large amount of phytoncide instead of wood flour.

In addition, the Republic of Korea Patent No. 978759 proposes a method of mixing the chaff and the coupling agent with the wood powder in the production of synthetic wood.

In addition, the Republic of Korea Patent No. 991506 is a plastic resin 12-22 wt% general polypropylene, impact polypropylene 4-7 wt%, polyethylene 6-11 wt%, antioxidant 0.1-0.3 wt%, lubricant 0.2-1 wt % Is blended first, 40-50 wt% of inorganic wood flour, 15-25 wt% of stake, 1-3 wt% of filler, 0.8-2.5 wt% of binder, 0.2-0.6 UV stabilizer A method of using wt% and an expanding agent is disclosed.

However, these methods have had a problem of deteriorating the eco-friendliness of wood by deteriorating the physical properties of the synthetic wood as described above and using various additives.

Accordingly, there is a continuing need for new synthetic wood and its manufacturing method to replace the additive mixing method, which lowers the physical properties of the synthetic wood, causes excessive use of additives, and requires an increase in manufacturing cost.

The problem to be solved in the present invention is to provide a new synthetic wood production method that can generate negative ions.

Another problem to be solved by the present invention is to provide a new synthetic wood production method that does not cause anion, but also cause a decrease in physical properties or additional use of additives.

Another problem to be solved by the present invention is to provide a new method for selectively forming anion particles in the surface layer.

In the present invention, the solution for solving the above problems is in the extrusion of the synthetic wood by mixing and heating wood powder and resin, the pressure injection by pressing the negative ion particles on the surface of the synthetic wood before the extrudate is cooled At least a portion of the negative ion particles are characterized in that it is fixed to the surface of the synthetic wood.

In the present invention, the surface temperature of the extruded synthetic wood is at least Tg, preferably at least Tg + 10 ° C, more preferably at least Tg + 10 ° C to Tg + 30 ° C of the resin. If the surface temperature of the wood is lower than the above range, the sprayed particles may not be deeply embedded by the surface elasticity, which may cause hardening of the surface of the wood or release of the particles during use. The temperature becomes too high and there is a fear of carbonization or gelation of the resin in the extruder. In a preferred embodiment of the invention, when the synthetic wood consists of polyethylene, polypropylene, or a combination thereof, it is pressurized at a temperature range of 100-160 ° C., more preferably 120-155 ° C., most preferably 140-150 ° C. It is good to spray.

In the present invention, the pressurized spraying is preferably such that each of the anion particles are sufficiently embedded in the surface, it is preferable to press the 50% by volume or more, more preferably 70% by volume or more of the particles. For example, in the case of inorganic anion particles, it is preferable to pressurize with pressure at 0.2-2 atmospheres.

In the present invention, it is preferable from the environmental point of view that the anion particles use a product obtained by grinding natural particles such as tourmaline. The tourmaline particles are complex borosilicates of iron, magnesium, alkali metals, and aluminum with chemical constituents, usually 6 or 9, sometimes triangular, and have a hardness of 7.0-7.5, It is preferable to use tourmaline having a specific gravity of 2.98-3.20. The tourmaline preferably has a particle size of about 100-600 mesh so as to be sprayed on the surface of the synthetic wood through the nozzle of the pressure injector, and more preferably 200-500 mesh. The tourmaline powder may be prepared using a conventional crusher.

In the present invention, the tourmaline particles may be used alone, for example, to reinforce additional functions such as antimicrobial properties, it is more preferable to use a product coated with a natural antimicrobial agent such as lacquer extract.

In a preferred embodiment of the present invention, the lacquer extract is preferably composed of 95-99 parts by weight of tourmaline and 1-5 parts by weight of the lacquer extract so as to have anion generation and antimicrobial at the same time.

In the present invention, the synthetic wood extrudate is also preferably used with the tourmaline in a range capable of maintaining the physical properties of the extrudate, more preferably tourmaline is 0.01-5 parts by weight, based on 100 parts by weight of synthetic wood, More preferably, it is good to use in the range of 0.1-1 weight part. When the amount of tourmaline is mixed in an amount of 5 parts by weight or more, the physical properties of the wood and the manufacturing cost of the product are increased.

In the practice of the present invention, when using tourmaline in the synthetic wood extrudate, preferably acrylic binder and / or in a solution in which tourmaline is dispersed on the surface of wood chips in order to minimize the deterioration of physical properties due to the tourmaline content. It is preferred to use a mixture of polyurethane binder and sprayed on wood powder to adhere to the surface or a mixture thereof.

In the present invention, the extrudate of the synthetic wood is preferably heated using a heater before the extrudate reaches the pressure injector so as to prevent the surface of the extrudate from being cooled before the pressure injection of the anion particles.

In addition, in the present invention, after the anion particles are fixed to the surface of the synthetic wood, it is also possible to press the rubber roller to pressurize the tourmaline particles deeper and then fix them.

Synthetic wood according to the present invention is embedded with far-infrared particles on the surface, it is possible to prevent far infrared rays generating effect, including the far-infrared particles to reduce the physical properties of the synthetic wood.

In addition, the synthetic wood according to the present invention, the far-infrared particles are fixed to be spaced apart from each other on the surface, the wood powder used for the synthetic wood is exposed to the outer surface can maintain the intrinsic aroma and texture of the wood.

1 is a schematic manufacturing process diagram and a cross-sectional enlarged view of a synthetic wood according to the present invention.
2 is a front view showing the surface of the synthetic wood according to the present invention.

Hereinafter, the present invention will be described in detail through examples. Although the following examples are described in detail in connection with the present invention, they should not be construed as limiting the scope of the present invention in any case, but are described to illustrate the contents of the present invention.

Example  One

Manufacture of synthetic wood

As shown in FIG. 1, wood flour was prepared using products of recycled wood or wood chips and sawdust. The size of the wood flour was cut in the range of 3-5cm, and wood flour whose water content was adjusted as needed. The wood flour was added to the hopper 120 of the extruder 100 by adding 0.1 part by weight of a lubricant and an antioxidant to 100 parts of synthetic wood mixed with 50 parts by weight of 50 parts by weight of polyethylene resin. The extruder used a twin screw extruder to increase kneading, and extruded while maintaining the extruder temperature at 180 ℃. An extruder was extruded in the form of synthetic wood by installing a mold 200 corresponding to the cross section of the synthetic wood panel in front of the extruder.

Fixation of Far Infrared Particles

As shown in FIG. 1, after the synthetic wood passes through the mold 200 of the extruder 100, the extrudate 150 moves to pass the thermal heater 500, and then passes through the lower part of the dry sprayer 300. In this case, the 400-500 mesh tourmaline particles 520 filled with the dry sprayer were sprayed under a pressure of 1.5 atm and fixed to a high temperature synthetic wood surface maintained at 140-150 ° C. The extrudate was pressed deeper to the surface while passing through the rubber roll 510. As shown in FIG. 2, anionic tourmaline particles irregularly spaced apart on the surface of the synthetic wood were fixed.

Example  2

1 g of water-soluble lacquer sap is diluted by spraying and coated with 99 parts by weight of the tourmaline powder prepared in Example 1, followed by drying, to prepare tourmaline particles coated with lacquer sap on the surface, and sprayed on the surface of the synthetic wood. The same procedure was followed except that the fixing was performed.

Example  3

Synthetic wood was prepared in the same manner as in Example 1, except that 3 parts by weight of tourmaline powder was further mixed in the manufacturing process of the synthetic wood in Example 1 to prepare wood.

Example  4

Synthetic wood was prepared in the same manner as in Example 1, except that 5 parts by weight of tourmaline powder and 1 part by weight of the acrylic binder were further mixed in the preparation process of the synthetic wood in Example 1.

compare Example  One

Wood flour was produced using products of recycled wood or wood chips and sawdust. The size of the wood flour was cut in the range of 3-5cm, and wood flour whose water content was adjusted as needed. 10 parts by weight of tourmaline was additionally mixed with 100 parts by weight of the prepared wood powder mixed with 50 parts by weight of polyethylene resin and 50 parts by weight of polyethylene resin to prepare a synthetic wood as in Example 1 by adding 0.1 parts by weight of a lubricant and an antioxidant.

compare Example  2

Wood flour was produced using products of recycled wood or wood chips and sawdust. The size of the wood flour was cut in the range of 3-5cm, and wood flour whose water content was adjusted as needed. The wood powder was added to 100 parts of synthetic wood mixed with 50 parts by weight and 50 parts by weight of polyethylene resin, and 0.1 parts by weight of a lubricant and an antioxidant were added to the hopper of the extruder as shown in FIG. 1. The extruder used a twin screw extruder to increase kneading, and extruded while maintaining the extruder temperature at 180 ℃. The front of the extruder was passed through a mold corresponding to the cross section of the synthetic wood panel and then cooled to prepare a synthetic wood.

The physical properties and the degree of anion generation of the synthetic wood prepared in Examples 1 to 4 and Comparative Examples 1 and 2 were measured and described in Table 1 below.

Properties / Samples Flexural strength Impact strength Negative ion Example 1 25 20 ○ Example 2 24 19 ○ Example 3 23 18 ◎ Example 4 22 18 ◎ Comparative Example 1 15 10 △ Comparative Example 2 26 21 ×

Impact strength is tested to ASTM 256 standard.

Flexural strength is tested to KS F 3200 standard.

Anion generation amount ◎: Very high. ○: High, △: Normal, ×: None

Claims (10)

In the method of manufacturing synthetic wood,
Extruding synthetic wood by mixing and heating wood flour and resin; And
Fixing the anion particles to the surface of the synthetic wood by pressurizing and spraying anion particles onto the surface of the synthetic wood before the synthetic wood extruded by the extrusion step is cooled;
Synthetic wood production method comprising a. The method of claim 1, wherein the surface temperature of the extruded synthetic wood is Tg + 10 ℃ to Tg + 30 ℃ of the resin. The method of claim 1, wherein the pressure spraying method presses the inorganic anion particles at a pressure of 0.2-2 atm. The method of claim 1, wherein the anionic particles are tourmaline. The method of claim 1, wherein the anion particles have a hardness of 7.0-7.5, specific gravity of 2.98-3.20, and a particle diameter of 100-600 mesh. The method of claim 4, wherein the tourmaline particles are 95-99 parts by weight of tourmaline and 1-5 parts by weight of the lacquer wood extract manufacturing method. delete delete The method of claim 1, wherein the extruded synthetic wood is heated by a heater before reaching the pressure injector. The method for producing synthetic wood according to claim 1, wherein the pressure is injected with a rubber roller after the pressure injection of the anion particles.

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