KR102364655B1 - Eco-friendly synthetic wood and manufacturing method thereof - Google Patents

Abstract

According to an embodiment of the present invention, a synthetic wood includes: 50 to 70% by weight of a mixture comprising wood flour and endocarp powder; 20 to 40% by weight of thermoplastic; and 5 to 10% by weight of an additive, wherein the mixture comprises 20 to 50% by weight of wood flour and 20 to 50% by weight of endocarp powder, the thermoplastic and the additive may be added to the mixture, and extrusion molding may be performed through a mold heated to 160 to 170.C. Accordingly, waterproofness can be improved.

Description

Eco-friendly synthetic wood and manufacturing method thereof

The present invention relates to synthetic wood, and more particularly, to an eco-friendly synthetic wood and a manufacturing method thereof.

In general, Wood Plastic Composite, which has a texture and appearance similar to natural wood, is strong against moisture and moisture as a polyolefin-based polymer completely surrounds micron-level fine wood powder. It is a new concept material that has both the advantages of high molecular weight and polymer, and has been widely used as interior and exterior materials for construction in recent years.

Synthetic wood is a kind of standardized industrial product, so it is easy to install, does not require separate painting or management compared to general preservative wood and wood materials, does not require deformation, is harmless to the human body and environment, and does not require preservative treatment like preservative wood. As a result, there is no environmental pollution, and it is an eco-friendly material that can be reused and reprocessed, has excellent heat resistance, tensile strength, and flexural strength, as well as almost no water absorption, so it can be used in natural exposure or in places with a lot of moisture. Therefore, the composite wood deck is being installed and constructed on the terrace of a country house or pension, a mountain sidewalk or a walkway installed along the driveway in the park.

However, when used for a long time, synthetic wood has weak moisture resistance, insect repellency, and antiseptic properties due to wood raw materials added in an amount of 50 to 70% by weight, and there are still disadvantages of shrinkage.

Republic of Korea Patent Publication No. 10-2021-0078937 (2021-06-29)

SUMMARY OF THE INVENTION The present invention is to solve the above problems, and an object of the present invention is to provide a synthetic wood manufactured using the inner peel of a plant fruit that is being treated as a waste.

Synthetic wood according to an embodiment of the present invention, a mixture of 50 to 70% by weight, including wood flour and inner peel powder; 20 to 40% by weight of a thermoplastic; and 5 to 10% by weight of an additive, wherein the mixture comprises 20 to 50% by weight of wood flour and 20 to 50% by weight of endothelial powder, wherein the thermoplastic plastic and the additive are added to the mixture to achieve 160 degrees Celsius It can be extrusion molded through a mold heated to 170 degrees.

In addition, the wood powder may be formed to have a particle size of 100 mesh, and the inner peel powder may be formed to have a particle size of 300 mesh.

In addition, the additive may include 1 to 5% by weight of a binder, 1 to 5% by weight of a flame retardant, 0.1 to 0.5% by weight of a UV absorber, or 1 to 5% by weight of a colorant.

A method for manufacturing a synthetic wood according to an embodiment of the present invention comprises the steps of separating the inner pericarp from the fruit of a plant; processing the endothelium into an endothelium powder having a particle size of 300mesh; creating a primary mixture by mixing the inner peel powder and wood flour having a particle size of 100 mesh; mixing 50 to 70% by weight of the first mixture, 20 to 40% by weight of a thermoplastic plastic, and 5 to 10% by weight of an additive to produce a secondary mixture; forming pellets by processing the secondary mixture; And extruding the pellets through a mold heated to 160 to 170 degrees Celsius to mold a synthetic wood, wherein the first mixture contains 20 to 50% by weight of wood flour and 20 to 50% by weight of endothelial powder, , the additive may include 1 to 5% by weight of a binder, 1 to 5% by weight of a flame retardant, 0.1 to 0.5% by weight of a UV absorber, or 1 to 5% by weight of a colorant.

According to the present invention, the waterproofness of the synthetic wood can be improved by including the inner pericarp of a plant fruit having high hydrophobicity compared to wood flour.

According to the present invention, the strength and anti-slip function of the synthetic wood can be improved by including the inner peel of a plant fruit with high frictional force.

According to the present invention, the synthetic wood, including the inner peel of an eco-friendly plant fruit, has a moisture and temperature control function, an antibacterial function, and a lifespan can be extended.

1 is a flowchart illustrating a method of manufacturing an eco-friendly synthetic wood according to an embodiment.
2 is a view showing the internal configuration of a plant fruit.
3 is a perspective view showing a composite wood according to an embodiment.
4 is a plan view of the composite wood of FIG. 3 viewed from various directions.
5 is a view showing an example of installation of the composite wood of FIG.
6 is a perspective view showing a composite wood according to another embodiment.
7 is a plan view of the composite wood of FIG. 6 viewed from various directions.
FIG. 8 is a view showing an example of installation of the composite wood of FIG. 6 .

Hereinafter, embodiments of the present invention will be described clearly and in detail to the extent that those of ordinary skill in the art can easily practice the present invention.

1 is a flowchart illustrating a method of manufacturing an eco-friendly synthetic wood according to an embodiment. 2 is a view showing the internal configuration of a plant fruit.

In step S110, the inner pericarp may be classified in the fruit of the plant. For example, the plant may be one containing the inner pericarp in the fruit such as peach, plum, apricot, cherry, pine, sunflower, ginkgo, walnut, and the like. The inner peel of plant fruit is usually discarded during post-harvest processing. As an example, FIG. 2 shows the internal configuration of a peach as a plant fruit used in the present invention. The peach (10) belongs to the genus Prunus LINN. of the family Drupaceae botanically, and has a thin outer skin (11), a fleshy mesodermal skin that can be eaten by humans (12), an inner peel composed of hard stone cells (13) and It contains seeds (14) inside the nucleus. Stone cells, which are the main components of the inner cortex 13, can be classified as rachysclereids among the sclereids. The stone cells of the inner pericarp 13 are lignin deposition in the cellulose of the cell wall within the tissue, and the cell wall is hardened and fixed. It has a tea cell wall. The stone cells of the inner pericarp 13 have higher hydrophobicity compared to the hydrophilic wood powder, so that the waterproofness of synthetic wood containing stone cells can be enhanced. In addition, the stone cells of the inner peel 13 have a high frictional force and are used as abrasives in toothpaste, cosmetics for exfoliating, etc., and when contained in synthetic wood, it is possible to increase the strength of the synthetic wood and strengthen the anti-slip function.

Hereinafter, the use of the peach 10 as a plant fruit in the manufacturing process of synthetic wood will be described. However, this is an example, and the inner peel of various plant fruits may be used in the manufacture of synthetic wood. In step S110, the peach 10 is separated into an outer skin 11, a mesocarpal 12, an inner peel 13 and a seed 14, and the inner peel 13 can be classified separately.

In step S120, the classified endothelium 13 may be processed. For example, the inner peel 13 may be processed into powder after washing and drying. For example, the inner skin 13 may be processed into a powder having a particle size of 300 mesh. Pure inner peel powder is eco-friendly, and the synthetic wood containing it has enhanced moisture and temperature control and antibacterial functions, so it can extend the lifespan of synthetic wood.

In step S130, a first mixture may be generated. For example, the first mixture may include wood flour and endothelial powder. The primary mixture may include 20 to 50% by weight of wood flour and 20 to 50% by weight of endothelial powder. 20 to 50% by weight of wood flour and 20 to 50% by weight of inner peel powder may be added to a blender and mixed. For example, the wood powder may be formed in a particle size of 100 mesh, and the inner peel powder may be formed in a particle size of 300 mesh. The inner peel powder can strengthen the strength of synthetic wood by filling the gaps in the wood powder. The primary mixture may be put into a mixer and dried by stirring at 90 to 120 degrees Celsius for 20 to 30 minutes. The moisture content of the primary mixture may be adjusted to 1% to 2%. If the moisture content is higher than the standard value (eg, 1% to 2%), the moisture evaporates during molding of the synthetic wood and bubbles are generated, which may affect the quality of the synthetic wood and cause defects.

In step S140, a secondary mixture may be generated. For example, the secondary mixture may include the primary mixture, a thermoplastic and additives. The secondary mixture may comprise 50 to 70% by weight of the primary mixture, 20 to 40% by weight of the thermoplastic, and 5 to 10% by weight of the additive. The content of the primary mixture in the secondary mixture may be determined from 60% by weight to ±10% by weight. When the content of the primary mixture is less than 50% by weight, the characteristics of wood as a building material are deteriorated, and when it is more than 70% by weight, sufficient physical properties of the synthetic wood may not be realized. As the thermoplastic plastic, polyethylene (PE) or polypropylene (PP) resin may be used. Additives may include binders, flame retardants, ultraviolet absorbers, or colorants, and the like. A binder may be added to improve bonding properties between wood flour and resin, a flame retardant may be added to increase the flame retardancy of synthetic wood, a UV absorber for blocking UV rays, etc. may be added, and an inorganic pigment for coloring may be added. The additive may comprise 1 to 5% by weight of a binder, 1 to 5% by weight of a flame retardant, 0.1 to 0.5% by weight of an ultraviolet absorber, or 1 to 5% by weight of a colorant.

In step S150, the secondary mixture may be molded into pellets. For example, the secondary mixture may be put into a hopper of a pellet manufacturing facility, transferred to a pellet manufacturing mold, and molded into pellets at 140 to 180 degrees Celsius. The molded pellets may be dried at room temperature.

In step S160, the composite wood may be molded. For example, the pellets of the secondary mixture may be put into the hopper of the extruder, heated to 170 to 240 degrees Celsius, and transferred to a mold provided inside the extruder. The mold is heated to 160 to 170 degrees Celsius, and the pellets of the secondary mixture can be extruded through the mold to be molded into synthetic wood. Synthetic wood containing inner bark powder has high antibacterial properties, prevents mold growth, and is resistant to moisture due to its moisture-proof function.

According to one embodiment, the synthetic wood may be formed by adjusting the ratio of the inner peel powder according to the required characteristics (eg, waterproofness, strength, anti-slip function, moisture and temperature control function, or antibacterial function). For example, the synthetic wood may include 50% by weight of wood, 20% by weight of inner peel powder, 25% by weight of thermoplastic plastic, and 5% by weight of additives. As another example, it may include 20% by weight of wood, 50% by weight of endothelial powder, 25% by weight of thermoplastic plastic, and 5% by weight of additives. As another example, 40% by weight of wood, 30% by weight of inner peel powder, 25% by weight of thermoplastic plastic and 5% by weight of additives may be included. As another example, it may include 30% by weight of wood, 40% by weight of inner peel powder, 25% by weight of thermoplastic plastic, and 5% by weight of additives. As another example, it may include 30% by weight of wood, 30% by weight of inner peel powder, 30% by weight of thermoplastic plastic, and 10% by weight of additives. As another example, it may include 25% by weight of wood, 25% by weight of inner peel powder, 40% by weight of thermoplastic plastic and 10% by weight of additives.

3 is a perspective view showing a composite wood according to an embodiment. 4 is a plan view of the composite wood of FIG. 3 viewed from various directions. 5 is a view showing an example of installation of the composite wood of FIG.

3 and 4, the composite wood 100 is a first side 110 (eg, the upper side), the second side 120 (eg, the lower side), the third side 130 (eg: right side), a fourth side 140 (eg, a left side), a fifth side 150 (eg, a front side), and a sixth side 160 (eg, a rear side). The first surface 110 or the second surface 120 may include a first intaglio pattern 111 or a second intaglio pattern 121 . For example, the first engraved pattern 111 or the second engraved pattern 121 may include an anti-slip function.

Referring to FIG. 5 , the first composite wood 100A and the second composite wood 100B may be disposed side by side. For example, the first composite wood 100A may be coupled to an object (eg, a base plate) by a first screw 201 . The second composite wood 100B may be coupled to an object (eg, a base plate) by a second screw 202 .

6 is a perspective view showing a composite wood according to another embodiment. 7 is a plan view of the composite wood of FIG. 6 viewed from various directions. FIG. 8 is a view showing an example of installation of the composite wood of FIG. 6 .

6 and 7, the composite wood 300 is a first side 310 (eg, an upper side), a second side 320 (eg, a lower side), a third side 330 (eg: right side), a fourth side 340 (eg, a left side), a fifth side 350 (eg, a front side), and a sixth side 360 (eg, a rear side). The first surface 310 or the second surface 320 may include a first intaglio pattern 311 or a second intaglio pattern 321 . For example, the first engraved pattern 311 or the second engraved pattern 321 may include an anti-slip function. In addition, the third surface 330 may include a first fastening groove 331 extending in the Y-axis direction. The fourth surface 340 may include a second fastening groove 341 extending in the Y-axis direction.

Referring to FIG. 8 , the third composite wood 300A and the fourth composite wood 300B may be fastened through the clip 400 . For example, the clip 400 may be coupled to an object (eg, a base plate) by a first screw 421 or a second screw 422 . The third composite wood 300A and the fourth composite wood 300B may be coupled to the T-shaped protrusion 410 of the clip 400 . The first fastening groove 331A of the third composite wood 300A may be coupled to one side of the protrusion 410 . The second fastening groove 341 of the fourth composite wood 300B may be coupled to the other side of the protrusion 410 . Therefore, after installation of the third composite wood 300A and the fourth composite wood 300B, when viewed from the outside, the clip 400 and screws (eg, the first screw 421 or the second screw 422) This is not observed, and the aesthetic appearance can be improved.

The above are specific embodiments for carrying out the present invention. In addition to the above-described embodiments, the present invention may include simple design changes or easily changeable embodiments. In addition, the present invention will include techniques that can be easily modified and implemented using the embodiments. Therefore, the scope of the present invention should not be limited to the above-described embodiments, and should be defined by the claims and equivalents of the claims of the present invention as well as the claims to be described later.

100: synthetic wood
110: first side
111: first engraved pattern
120: second side
121: second engraved pattern
130: the third side
140: the fourth side
150: 5th side
160: the sixth side

Claims (2)

In synthetic wood,
70% by weight of the mixture;
20% by weight of thermoplastic; and
10% by weight of an additive,
The mixture is produced by stirring 20 to 29% by weight of wood flour and 41 to 50% by weight of peach inner peel powder at 90 to 120 degrees Celsius for 20 to 30 minutes and drying,
The wood powder is formed to have a particle size of 100 mesh,
The peach inner peel powder is formed by separating the peach inner peel existing between the peach seed and the peach middle peel in peach and pulverizing it to have a particle size of 300 mesh,
The additive comprises 1 to 5% by weight of a binder, 1 to 5% by weight of a flame retardant, 0.1 to 0.5% by weight of a UV absorber, or 1 to 5% by weight of a colorant,
The synthetic wood is molded into pellets by adding the thermoplastic plastic and the additive to the mixture, and the pellet is extruded through a mold heated to 160 to 170 degrees Celsius,
The synthetic wood is
a first surface facing a first direction;
a second surface opposite the first surface;
a third surface facing a second direction perpendicular to the first direction;
a fourth surface opposite to the third surface;
a fifth surface facing a third direction perpendicular to the first direction and the second direction; and
a sixth surface opposite to the fifth surface;
The first surface and the second surface include an intaglio pattern having an anti-slip function,
The third and fourth surfaces are parallel to the first surface and include grooves extending in the third direction. In the manufacturing method of synthetic wood,
Separating the peach inner peel existing between the peach seed and the peach mesodermal in the peach;
processing the peach inner peel powder into a peach inner peel powder having a particle size of 300 mesh;
41 to 50% by weight of the peach inner peel powder and 20 to 29% by weight of wood flour having a particle size of 100mesh are mixed, stirred at 90 to 120 degrees Celsius for 20 to 30 minutes, and dried to produce a 70% by weight primary mixture to do;
mixing 70% by weight of the first mixture, 20% by weight of a thermoplastic plastic, and 10% by weight of an additive to produce a secondary mixture;
forming pellets by processing the secondary mixture; and
Extruding the pellets through a mold heated to 160 to 170 degrees Celsius, comprising the step of molding a composite wood,
The additive comprises 1 to 5% by weight of a binder, 1 to 5% by weight of a flame retardant, 0.1 to 0.5% by weight of a UV absorber, or 1 to 5% by weight of a colorant,
The synthetic wood is
a first surface facing a first direction;
a second surface opposite the first surface;
a third surface facing a second direction perpendicular to the first direction;
a fourth surface opposite to the third surface;
a fifth surface facing a third direction perpendicular to the first direction and the second direction; and
a sixth surface opposite to the fifth surface;
The first surface and the second surface include an intaglio pattern having an anti-slip function,
The third surface and the fourth surface are parallel to the first surface and include a groove extending in the third direction.

Images