KR102050549B1 - Method for manufacturing of synthetic wood and itself - Google Patents

Abstract

The present invention relates to a method for manufacturing a synthetic wood with natural wood patterns and improved antibacterial properties, and a synthetic wood manufactured thereby. The method comprises: a main material forming step (S10) of forming a main material based on wood flour or mixed flour of wood flour, rice straws, and reeds, an ABS resin, polypropylene, yellow soil, and an additive; a color material forming step (S20) of forming a color material having a single color or a complex color by using one or more inorganic pigments; a main material introducing step (S30) of introducing the main material into a first inlet part (11) prepared at a front side of an extruder (10) and supplying the same to an extrusion screw (12); a color material mixing step (S40) of intermittently introducing the color material into a second inlet part (13) prepared at one side of the first inlet part (11) and supplying the same to the extrusion screw (12); and a molding step (S50) of extruding a base material prepared from the main material intermittently mixed with the color material with a molding machine (20) and molding a synthetic wood formed with natural wood grains on the surface and the core part thereof. According to the present invention, a synthetic wood of high quality can be manufactured.

Description

Manufacturing method of synthetic wood and natural wood produced by improving natural veneer and antimicrobial properties TECHNICAL FIELD OF THE INVENTION {METHOD FOR MANUFACTURING OF SYNTHETIC WOOD AND ITSELF}

The present invention relates to a method for producing a synthetic wood and a synthetic wood produced thereby to improve the natural veneer and antimicrobial properties, and more particularly, molding in the form of a plate or a square material using a raw material synthesized wood powder and other components The present invention relates to a technology for producing a high-quality synthetic wood having an effect similar to natural veneer by configuring a composition and a manufacturing method of a material that is different from the prior art when manufacturing a synthetic wood to be manufactured.

In general, natural wood has difficulty in supply and demand due to the finiteness of resources and becomes a major factor in the increase in manufacturing cost. Recently, the development and use of synthetic wood, which is cheaper and easier to process and maintain than natural wood, has been actively performed.

Synthetic wood is produced by injection or extrusion molding a raw material obtained by synthesizing wood powder, a by-product of wood products, and a polymer resin such as polypropylene and polyethylene. The injection molding method is suitable for the manufacture of high-grade furniture or synthetic wood for decorative materials, and the extrusion molding method is mainly used for the production of flat plates or square materials used for building materials.

As an example of the known technology, Korean Patent No. 10-1421338 discloses a step of impregnating color chips by impregnating a liquid dye in a wood chip, which is a step of preparing wood powder, and preparing wood powder embodied in color by crushing the color wood chips. To prepare a gel-like mixture by adding plastic and additives to the wood powder, and then kneading the colored powder, and extruding the prepared mixture through a mold of an extruder to produce a synthetic wood, the mixture is made of wood Powders A polyolefin-based resin comprising any one or more of polypropylene and polyethylene and a method for producing a synthetic wood comprising a binder are provided.

As another example, the composite wood composition used as interior and exterior materials of the Korean Patent Registration No. 10-1450764 building may be composed of wood powder, a primary composition composed of polypropylene or high density polyethylene or polyethylene teraphrate, a binder, and an antioxidant. And a synthetic wood composition comprising calcium stearate, a light stabilizer, an ultraviolet absorber, a lubricant, and a pigment.

On the other hand, since the synthetic wood produced by the prior art as described above is apparently different from natural wood in appearance, it may be accompanied by additional processing to give a surface texture or pattern. Most commonly, a method of wrapping a sheet on which a predetermined wood pattern is expressed on the surface of a synthetic wood is widely used.

Or, for example, as in the Republic of Korea Patent Registration No. 10-1316551, the synthetic wood that is extruded is introduced in the longitudinal direction of the main body and passed through the stamping roller, the stamping roller presses the surface of the synthetic wood in a heated state in the heating section It is configured to give a predetermined texture to the surface of the synthetic wood using a stamped pattern forming apparatus of synthetic wood to form a stamped pattern.

As another example, Korean Patent No. 10-1214788 describes a step of producing a mixed raw material by mixing a polymer resin, wood flour, rubber chips or cork chips, or mixed rubber chips and cork chips, and extruding the mixed raw materials to synthesize the raw materials. It comprises the step of molding wood, and in the forming step, the raw material is extruded to form a hollow portion in the longitudinal direction therein, and the hollow portion exhibits color and pattern, including the step of mixing and filling the polymer resin and coal waste-rock Configure the method of manufacturing synthetic wood.

Korea Patent Registration No. 10-1421338 (2014.07.18) Korea Patent Registration No. 10-1450764 (2014.10.17) Korea Patent Registration No. 10-1316551 (2013.10.10) Korea Patent Registration No. 10-1214788 (2012.12.24)

Synthetic wood manufacturing method to which the prior art is applied as described above is made to produce a raw material synthesized from a polymer resin such as polypropylene, polyethylene and the like as a main material in a predetermined form in the form of a plate or square material.

That is, in the prior art, since the powder or resinous materials are mixed to form a synthetic wood by passing through an extruder, the surface and the core of the synthetic wood have the same texture and color as in the exemplary image of FIGS. 5 to 6. There is a drawback is that it is derived from the natural wood and obvious differences with the naked eye.

In order to solve such a problem, conventionally, a technique for achieving a visual effect similar to that of natural wood is applied by wrapping a sheet in which a predetermined grain of wood pattern is expressed on the surface of synthetic wood, but an additional process for manufacturing and attaching the sheet is applied. As a matter of course, due to problems such as peeling of the sheet from the synthetic wood according to the use state, there is a problem that is practically unsuitable for the synthetic wood for the exterior material.

In addition, the prior art, as an example, includes a configuration in which a groove is pressed into a surface of a synthetic wood or a heterogeneous material is filled in the groove to express a predetermined texture.

However, it is still difficult to express the wood grain pattern peculiar to natural wood only by the configuration of the prior art as described above, and even it can be applied only to the surface of synthetic wood.

Therefore, the present invention is invented to solve the problems of the prior art as described above,

Main raw material composition step (S10) of forming a main raw material consisting of wood flour or mixed powder of wood flour and rice straw and reeds, ABS resin, polypropylene, ocher, and additives;

Color raw material composition step (S20) of forming a color raw material consisting of a single color or a complex color using one or more inorganic pigments;

A main raw material input step S30 of supplying the main raw material to the first input part 11 provided at the side of the extruder 10 and supplying the main raw material to the extrusion screw 12;

A color raw material mixing step (S40) of supplying the color raw material intermittently to the second input unit (13) provided on one side of the first input unit (11) and supplying it to the extrusion screw (12); And

And a molding step (S50) of extruding the raw material, in which the color raw material is arbitrarily mixed into the main raw material, into a molding machine 20 to form a synthetic wood forming natural wood grains on the surface and the core by the color raw material (S50). Configure.

In addition, in the main raw material forming step (S10), the wood powder is provided with a particle size of 40 to 80 mesh, the straw and reeds are prepared by mixing in a state provided with a size of 1 ~ 2mm, the additive is a silane coupling agent, antioxidant And sunscreens.

In addition, the main raw material input step (S30) and the color raw material mixing step (S40), by supplying the main raw material to the extrusion screw 12 to supply the color raw material in one pitch while being extruded over a range of 15 to 25 pitch with a time difference To be incorporated.

Therefore, in the synthetic wood produced by extrusion molding by the synthetic wood manufacturing method as described above,

Body 110 consisting of 50 parts by weight of a mixture of wood flour or wood flour and rice straw and reed, 27 parts by weight of ABS resin, 5 parts by weight of polypropylene, 10 parts by weight of ocher, and 8 parts by weight of additives; And

And a pattern portion 120 formed of a color raw material that is composed of one or more inorganic pigments to form a single color or a complex color.

The pattern portion 120 can achieve the purpose of manufacturing a synthetic wood to form a natural wood grain pattern on the surface and core portion of the body 110.

The present invention discriminates the composition and manufacturing method of the material constituting the synthetic wood from conventional synthetic wood manufacturing technology to produce a high quality synthetic wood having a similar effect to natural veneer wood.

Therefore, the present invention has the advantage of maximizing the cohesive force between the materials constituting the main raw material to improve the durability of the synthetic wood, and to implement antibacterial properties to improve the life and maintenance of the synthetic wood.

In particular, compared to the conventional synthetic wood has a distinctive appearance from natural wood, the present invention is configured to form a grain of wood grain on the surface and core during the manufacturing process of synthetic wood, such as lapping or stamping process as in the prior art There is an advantage in that it is possible to manufacture a synthetic wood that implements a beautiful natural veneer effect without involving a separate post-processing process.

1 is a process flow diagram of a method for producing a synthetic wood according to the present invention.
Figure 2 is an exemplary embodiment of a method for producing a synthetic wood according to the present invention.
3 to 4 is an exemplary image of a synthetic wood produced by the method for producing a synthetic wood according to the present invention.
5 to 6 is an exemplary image of a synthetic wood according to the prior art.

Hereinafter, with reference to the accompanying drawings, the configuration and operation according to a preferred embodiment of the synthetic wood and the synthetic wood produced by the method for producing a natural wood veneer and antibacterial properties of the present invention will be described in detail as follows. In the following description, a detailed description of parts that can be easily implemented by those skilled in the art may be omitted. In addition, the following description is to be described with reference to a preferred embodiment of the present invention, the present invention is not limited by the following examples and it is natural that various modifications can be provided within the scope without departing from the scope of the invention will be.

1 is a process flow diagram of a method for manufacturing synthetic wood according to the present invention, FIG. 2 is an exemplary embodiment of a method for manufacturing synthetic wood according to the present invention, and FIGS. 3 to 4 are shown by a method for manufacturing synthetic wood according to the present invention. Exemplary image of the synthetic wood produced, Figures 5 to 6 show an exemplary image of the synthetic wood according to the prior art.

Natural wood veneer to which the technology of the present invention is applied and a method for producing a synthetic wood with improved antimicrobial properties, and the synthetic wood produced by it is composed of natural wood veneer It is to be noted that the present invention relates to a technique for producing a high-quality synthetic wood having a similar effect and having various functionalities.

The method for producing a synthetic wood of the present invention for this purpose as shown in Figures 1 to 2 using the synthetic wood manufacturing apparatus having an extruder 10 and the molding machine 20, the main raw material forming step (S10) and the color raw material It consists of a series of steps including the composition step (S20), the main raw material input step (S30), the color raw material mixing step (S40), and the molding step (S50), specifically as follows.

The main raw material forming step (S10) is a step of forming a main raw material consisting of wood flour or mixed powder of wood flour and rice straw and reed, ABS resin, polypropylene, ocher and additives.

The wood powder is formed by using by-products generated during the manufacture of wood products or by grinding the coniferous trees, deciduous trees, bamboos, etc. to a predetermined particle size and drying them.

The rice straw and reeds are made of natural fibers and have a light weight, so that the rice straw and reeds are provided to act as reinforcement on powdered wood flour.

In the main raw material forming step (S10), the wood powder is provided with a particle size of 40 to 80 mesh, the straw and reeds are prepared by mixing in a state provided with a size of 1 ~ 2mm. As such, the difference between the particle sizes of the two components is to be described later so that the straw and reeds having a low density in the process of stirring the main material by the extrusion screw 12 in the main raw material input step (S30), which will be described later, have a particle size distribution in the core portion compared to the wood flour. To act. Therefore, after the forming step (S50), the surface of the synthetic wood is configured to distribute a high specific gravity of the wood powder particles so that a neat finish is made. In addition, the rice straw? When the size of the reed is out of the above range, the reinforcing performance is lowered, or bubbles and voids may be formed around the particles, which may cause a decrease in strength of the synthetic wood.

The ABS resin is a resin composed of conventional acrylonitrile, butadiene, and styrene components, and is mixed to impart impact resistance and heat resistance to materials made of powder such as wood powder.

The polypropylene is a thermoplastic resin that imparts a bonding force between materials and acts to improve chemical resistance, thermal and mechanical properties.

The loess is known to emit far infrared rays from the main components such as silica, alumina, iron, magnesium, sodium and the like. In the present invention, the ocher is mixed with the main raw material of the synthetic wood to give antimicrobial and mold growth inhibitory, it is configured to derive the effect of enhancing the cohesive strength by increasing the cohesive force between the materials by the ocher particles.

The additives include silane coupling agents, antioxidants, and sunscreens. The silane coupling agent acts to increase the bonding force by inducing a polymerization reaction between molecules constituting the dissimilar material, and for example, vinyltrimethoxysilane may be used. Antioxidant acts to prevent discoloration and oxidation by the action with oxygen, and for example, tetrakis (methylene-3,5-di-tert-butyl-4-hydroxyphenylhydrocinnamate) methane and the like can be used. The sunscreen acts to impart UV protection and weather resistance and for example tris (2,4-di-tert-butylphenyl) phosphite can be used.

In the main raw material forming step (S10), the mixture of 50 parts by weight of wood flour or wood powder, rice straw and reeds, 27 parts by weight of ABS resin, 5 parts by weight of polypropylene, 10 parts by weight of ocher, and 8 parts by weight of additives To make up.

The color raw material forming step (S20) is a step of forming a color raw material consisting of one or more inorganic pigments using one or more inorganic pigments. Since inorganic pigments have high light resistance, they are suitable for synthetic wood for building materials. The color raw material is composed of a color different from the main raw material, for example, a light color or a deeper color than the main raw material, or a complex color of a mixture thereof to express a wood grain pattern.

The main raw material input step (S30) is a step of supplying the main raw material to the first injection unit 11 provided on the side of the extruder 10 to supply to the extrusion screw 12.

As schematically shown in Figure 2, the extruder 10 of the manufacturing apparatus used in the method for producing a synthetic wood of the present invention is provided with a first injection portion 11 on the side on the basis of the traveling direction of the extrusion screw 12. Then, the second injection portion 13 is provided on one side (rear side) of the first injection portion 11.

In the main raw material input step (S30), the main raw material composed of the above materials is first introduced into the first injection unit 11 and supplied to the extrusion screw 12.

The color raw material mixing step (S40) is a step of feeding the color raw material intermittently to the second input part 13 provided on one side of the first input part 11 to supply the extrusion screw 12.

That is, in the main raw material input step (S30) is made to continuously supply the main raw material to the extrusion screw 12 through the first input unit 11, in the color raw material mixing step (S40) the main screw is being supplied with an extrusion screw ( 12) The color raw material is intermittently mixed. The color raw material is helically stirred in the main raw material by the rotation of the extrusion screw 12 to form a pattern in the shape of wood grain.

Specifically, the main raw material input step (S30) and the color raw material mixing step (S40) is to supply the main raw material to the extrusion screw 12, while supplying the color raw material at one pitch while being extruded over a range of 15 to 25 pitch with a time difference To be incorporated.

The extruder 10 used in the manufacture of synthetic wood is equipped with an extrusion screw 12 having a constant pitch specification in proportion to the extrusion speed and the extrusion amount, in the present invention the color based on the pitch of the extrusion screw 12 In the raw material mixing step (S40), the time of mixing the color raw materials is set to have a time difference from the main raw materials to form a natural wood grain pattern.

The molding step (S50) is a step of molding a synthetic wood to form a natural wood grain on the surface and the core by the color raw material by extruding the raw material optionally mixed with the color raw material in the main raw material to the molding machine 20.

Synthetic wood produced by the molding step (S50) may be a variety of forms, such as plate or angular material, it may be to give the texture of natural wood by forming irregularities on the surface with wood grain pattern depending on the mold used. .

On the other hand, the synthetic wood 100 is produced by extrusion molding by the method of manufacturing a synthetic wood applied to the technique of the present invention having the configuration as described above is a plate or a square material to form a pattern portion 120 in the body 110 Consists in the form of.

The body 110 is composed of 50 parts by weight of a mixture of wood flour or wood powder and rice straw and reed, 27 parts by weight of ABS resin, 5 parts by weight of polypropylene, 10 parts by weight of ocher, and 8 parts by weight of additives. .

The pattern part 120 is made of a color raw material that is composed of one or more inorganic pigments in a single color or a complex color.

In particular, the synthetic wood 100 according to the present invention is configured so that the pattern portion 120 forms a natural wood grain pattern on the surface and the core of the body 110, as shown in the example image of FIGS. The shape and position of the 120 may be arbitrarily formed with respect to the body 110 according to the physical properties of the pigment used as the color raw material and the stirring state by the extrusion screw 12.

The method of manufacturing synthetic wood according to the present invention as described above has a similar effect to that of natural veneer through a series of steps using the main raw material and the color raw material composed of the composition as described above, different from the conventional technology for producing wood powder as a main component To prepare a synthetic wood having.

Therefore, the present invention has the effect of maximizing the cohesive force between the materials constituting the main raw material to improve physical properties such as durability and bending strength of the synthetic wood, and to implement antibacterial properties to improve the life, maintenance and eco-friendliness of the synthetic wood To derive.

In particular, the present invention is configured to form a natural wood grain pattern on the surface and the core of the synthetic wood during the extrusion process of the main raw material and color raw material, so as to eliminate the additional post-processing process, such as wrapping the sheet as in the prior art more easily It is possible to manufacture high-quality synthetic wood with natural veneer effect, and ultimately, it has many advantages such as improving workability, productivity, and product competitiveness in manufacturing synthetic wood. It is expected to be.

S10: main raw material preparation stage
S20: Color raw material forming step
S30: main raw material input step
S40: Color raw material mixing step
S50: forming step
100: synthetic wood
110: body
120: pattern part

Claims (4)

50 parts by weight of a mixture of wood flour, straw and reed, 27 parts by weight of ABS resin, 5 parts by weight of polypropylene, 10 parts by weight of ocher, and 8 parts by weight of additives to form a main raw material (S10) and ,
Color raw material composition step (S20) of forming a color raw material consisting of a single color or a complex color using one or more inorganic pigments,
A main raw material input step (S30) of supplying the main raw material to the first input part 11 provided on the side of the extruder 10 and supplying the main raw material to the extrusion screw 12;
A color raw material mixing step (S40) of supplying the color raw material intermittently to the second input part 13 provided at the rear side of the first input part 11 and supplying the extruded screw 12;
And a molding step (S50) of extruding the raw material, in which the color raw material is arbitrarily mixed in the main raw material, into a molding machine 20 to form a synthetic wood forming natural wood grains on the surface and the core by the color raw material.
In the main raw material forming step (S10),
Wood flour is provided with a grain size of 40 ~ 80 mesh, rice straw and reeds are mixed in a state of 1 ~ 2mm size to prepare the straws and reeds in the main material input step (S30) to have a particle size distribution in the core compared to the wood flour,
The main raw material input step (S30) and the color raw material mixing step (S40),
Production of synthetic wood with improved natural wood veneer and antimicrobial characteristics, characterized in that the main material is supplied to the extrusion screw 12 to be mixed at a time difference by supplying the color material at 1 pitch while being extruded over a range of 15 to 25 pitch. Way. delete delete delete

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