KR20110099468A - Synthetic wood product with excellent strength and method for manufacturing the same - Google Patents

Synthetic wood product with excellent strength and method for manufacturing the same Download PDF

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Publication number
KR20110099468A
KR20110099468A KR1020100018515A KR20100018515A KR20110099468A KR 20110099468 A KR20110099468 A KR 20110099468A KR 1020100018515 A KR1020100018515 A KR 1020100018515A KR 20100018515 A KR20100018515 A KR 20100018515A KR 20110099468 A KR20110099468 A KR 20110099468A
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KR
South Korea
Prior art keywords
synthetic wood
synthetic
wood
parts
weight
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KR1020100018515A
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Korean (ko)
Inventor
김충식
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주식회사 더우드
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Priority to KR1020100018515A priority Critical patent/KR20110099468A/en
Publication of KR20110099468A publication Critical patent/KR20110099468A/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27M—WORKING OF WOOD NOT PROVIDED FOR IN SUBCLASSES B27B - B27L; MANUFACTURE OF SPECIFIC WOODEN ARTICLES
    • B27M1/00—Working of wood not provided for in subclasses B27B - B27L, e.g. by stretching
    • B27M1/08—Working of wood not provided for in subclasses B27B - B27L, e.g. by stretching by multi-step processes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
    • B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
    • B27N3/04—Manufacture of substantially flat articles, e.g. boards, from particles or fibres from fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
    • B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
    • B27N3/08—Moulding or pressing
    • B27N3/28—Moulding or pressing characterised by using extrusion presses

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Dry Formation Of Fiberboard And The Like (AREA)

Abstract

The present invention relates to a synthetic wood product having excellent strength and a method of manufacturing the same, and more particularly, to a synthetic wood body molded from a mixture including wood powder and synthetic resin; And a fiber reinforcing layer formed on the synthetic wood body, and a method of manufacturing the same. According to the present invention, the fiber reinforcing layer has excellent flexural strength (for example, 90 N / mm 2 or more), breaking strength, and the like.

Description

Synthetic wood products with high strength and manufacturing method {SYNTHETIC WOOD PRODUCT WITH EXCELLENT STRENGTH AND METHOD FOR MANUFACTURING THE SAME}

The present invention relates to a synthetic wood product and a method for manufacturing the same, and more particularly, by forming a fiber reinforcement layer in a synthetic wood body molded from a mixture comprising wood powder and synthetic resin, the composite wood product having excellent strength such as bending strength and breaking strength And to a method for producing the same.

In general, construction materials for walking, etc. are constructed in hiking trails, trails, pedestrian paths, stairs or yards of detached houses. Stone, wood, concrete, brick, etc. are used as the building material. However, these building materials are difficult to mass-produce, especially in the case of stone or solid wood is difficult to secure the material for mass production. In addition, since the building material is not constant in appearance shape, a separate dimension processing was required for standardization.

Accordingly, synthetic wood products using wood powder have recently been used. Such synthetic wood products are generally manufactured by extrusion molding a mixture (material) containing wood powder, synthetic resin, and the like. However, the conventional synthetic wood products have a weak strength, such as bending strength and breaking strength. Conventional synthetic wood products, for example, have a strength of about 25 N / mm 2 of flexural strength. Conventional synthetic wood products have such a weak strength that it is easily bent by external force, there is a problem that is easily broken by the impact. Accordingly, when constructing a staircase, a hiking trail, or the like using a synthetic wood product, the installation quantity of a frame (joist) for supporting the synthetic wood product is increased, resulting in a long construction and a high cost. In addition, there is a problem that can not use a high weight, and can not ensure stability when used in high altitude.

The present invention has been made to solve the conventional problems as described above, by forming a fiber reinforcement layer in a synthetic wood product, to provide a composite wood product excellent in strength, such as bending strength and breaking strength, and a method of manufacturing the same There is a purpose.

The present invention for achieving the above object,

A synthetic wood body molded from a mixture comprising wood flour and synthetic resin; And

It provides a synthetic wood product comprising a fiber reinforcement layer formed on the synthetic wood body.

At this time, the synthetic wood body is inserted groove is formed, the fiber reinforcement layer is preferably inserted into the insertion groove.

In addition, the present invention,

A first step of obtaining a mixture comprising wood flour and synthetic resin;

A second step of extruding the synthetic wood body by introducing the mixture into an extruder; And

It provides a method for producing a synthetic wood product comprising a third step of forming a fiber reinforcement layer at the same time as the extrusion of the synthetic wood body.

At this time, the second step is extrusion molding so that the insertion groove is formed in the synthetic wood body, the third step is preferably inserted into the fiber reinforcement layer to form the insertion groove.

According to the present invention, the fiber reinforcement layer is formed to have an excellent bending strength and breaking strength. In addition, when the fiber reinforcing layer is inserted and formed in the insertion groove of the synthetic wood body, the bonding force with the synthetic wood body is improved.

1 is a perspective view of a synthetic wood product according to a first embodiment of the present invention.
2 is a cross-sectional view of a synthetic wood product according to a second embodiment of the present invention.
3 is a cross-sectional view and an enlarged view of main parts of a synthetic wood product according to a third embodiment of the present invention.
4 is a process chart for explaining a method for manufacturing a synthetic wood product according to the present invention.
5 is a cross-sectional view of an extrusion die used in the method for producing a synthetic wood product according to the present invention.

Hereinafter, with reference to the accompanying drawings will be described in detail the present invention. The accompanying drawings show exemplary embodiments of the present invention, which are provided only to assist in understanding the present invention, and thus the technical scope of the present invention is not limited thereto.

First, referring to FIG. 1, the synthetic wood product according to the present invention includes a synthetic wood body 10 and a fiber reinforcement layer 20 formed on the synthetic wood body 10.

The synthetic wood body 10 is molded from a mixture comprising wood powder and synthetic resin, which may have a plate-like shape having a rectangular cross section as illustrated in the drawing. The synthetic wood body 10 is preferably extruded from a mixture containing 50 to 70 parts by weight of wood powder, 10 to 40 parts by weight of synthetic resin and 2 to 20 parts by weight of inorganic filler.

The wood powder may be selected from pulverized materials such as solid wood or waste wood, sawdust discharged from wood cattle and the like. The kind of wood flour is not limited, and any type of wood flour may be used as long as the synthetic wood body 10 exhibits the feel and characteristics of the wood. The wood powder is preferably contained in 50 to 70 parts by weight based on 100 parts by weight of the total mixture for molding the synthetic wood body 10, in this case, if the content of wood powder is less than 50 parts by weight, Natural feel, that is, wood properties (looks like wood) or feel may not appear well, if the content of wood powder exceeds 70 parts by weight, the ratio of wood powder is high, the bonding strength may be lowered, durability may be weakened. The content of wood flour is more preferably 50 to 65 parts by weight.

The synthetic resin is used for bonding strength and moldability (extrusion) of wood powder, and such synthetic resin is not particularly limited. The synthetic resin can be used as long as it has a resin having an adhesive force. For example, PP (polypropylene), PE (polyethylene), PET (polyethylene terephthalate), PC (polycarbonate), PVC (polyvinyl chloride), nylon, polyacetic acid One or more mixtures selected from the group consisting of vinyl, rubber latex, silicone resin, urea-formaldehyde, carboxymethylcellulose, and the like can be used. Such synthetic resin is preferably included in 10 to 40 parts by weight based on 100 parts by weight of the total mixture for molding the synthetic wood body 10, wherein the amount of synthetic resin is less than 10 parts by weight of the bonding force and formability (extrusion) If it exceeds 40 parts by weight, the content of wood may be relatively low because the content of wood powder is too low. The content of the synthetic resin is more preferably 20 to 40 parts by weight.

The inorganic filler is used for strength reinforcement, and the like, and the inorganic filler may be used as long as the inorganic powder. Inorganic fillers may be selected from, for example, calcium carbonate, calcium hydroxide, lime, silica and the like. The inorganic filler is preferably included in 2 to 20 parts by weight based on the total 100 parts by weight of the mixture for molding the synthetic wood body 10, when the less than 2 parts by weight of the inorganic filler may have an effect such as strength reinforcement may be insignificant. If it exceeds 20 parts by weight, the content of wood or synthetic resin is relatively low, so that the characteristics of wood may not be shown well, or the bonding strength and formability may be weakened. The inorganic filler is more preferably 5 to 15 parts by weight.

In addition, the synthetic wood body 10 may be extruded from a mixture further comprising other additives in addition to the wood powder, synthetic resin and inorganic filler as described above. In this case, the additive may be selected from, for example, a stabilizer, a color pigment, and the like, and the additive may be 0.1 to 10 parts by weight based on 100 parts by weight of the total mixture for forming the synthetic wood body 10. May be included. More specifically, for example, the stabilizer may include 0.1 to 8 parts by weight, and the pigment may be included in 0.1 to 5 parts by weight, but is not limited thereto.

Synthetic wood products according to the present invention, as described above has a structure in which the fiber reinforcement layer 20 is formed in the synthetic wood body 10 to improve the strength. At this time, the fiber reinforcing layer 20, for example, when the synthetic wood body 10 has a rectangular cross section, it may be formed on any one surface or two or more surfaces. More specifically, for example, when the synthetic wood body 10 has a plate-like shape, as shown in FIG. 1, the fiber reinforcement layer 20 may be formed on the lower surface of the synthetic wood body 10. In addition, the fiber reinforcement layer 20 may be formed on the upper surface of the synthetic wood body 10, or may be formed of a structure (intermediate layer) interposed between the synthetic wood body 10.

The fiber reinforcement layer 20 may be selected from a nonwoven fabric or a mat made from fibers. In this case, the fibers may be exemplified by synthetic fibers, glass fibers and carbon fibers. Specifically, the fiber reinforcement layer 20 is a non-woven fabric or mat manufactured from one or two or more selected from the group consisting of polyester fibers, nylon fibers, blended fibers of polyester and nylon, glass fibers and carbon fibers, etc. This can be used. The fiber reinforcement layer 20 may be bonded and formed on the synthetic wood body 10 by adhesive or heat fusion. At this time, the adhesive is not particularly limited, but one or more resin adhesives selected from epoxy resins, urethane resins, acrylic resins, and the like may be used. More specifically, for example, the fiber reinforcement layer 20 may be formed by pressing and bonding the glass fiber mat impregnated with an epoxy resin to the synthetic wood body 10.

In addition, referring to Figures 2 and 3, it is preferable that the insertion groove 12 is formed in the synthetic wood body 10 in accordance with a preferred embodiment of the present invention. The fiber reinforcing layer 20 is inserted and bonded to the insertion groove 12. As such, when the insertion groove 12 is formed in the synthetic wood body 10, and the fiber reinforcement layer 20 is formed by inserting and joining the insertion groove 12, the synthetic wood body 10 and the fiber reinforcement layer 20 are formed. ), The bonding force is further improved. At this time, the insertion groove 12 may be formed with one or two or more in the longitudinal direction of the synthetic wood body 10. 2 illustrates a state in which one insertion groove 12 is formed in the longitudinal direction of the synthetic wood body 10, and FIG. 3 illustrates a state in which three insertion grooves 12 are formed.

According to the present invention, the fiber reinforcement layer 20 as described above is excellent in flexural strength and breaking strength, such that it is not easily bent by external force or easily damaged by impact. Accordingly, when constructing a staircase or the like using the synthetic wood product according to the present invention, it is possible to reduce the installation quantity of a frame (joint) for supporting the synthetic wood product, and to reduce the construction period and cost.

In addition, according to the present invention, the fiber reinforcement layer 20 is formed in a separate layer from the synthetic wood body 10, it is easy to recycle (recycling). Specifically, in order to reinforce the strength of the synthetic wood products, a method of forming a mixture of fibers and wood in addition to the wood powder and synthetic resin as a material of the synthetic wood may be considered, but this is because the fibers are embedded and dispersed in the synthetic wood (disposal) Difficulty in separating fibers However, in the synthetic wood product according to the present invention, the fiber reinforcement layer 20 is formed as a separate layer, so that the separation of the fiber reinforcement layer 20 is easy and regeneration is easy.

In addition, the synthetic wood products according to the present invention may have an assembly structure for assembling with the adjacent synthetic wood products. Specifically, as illustrated in FIGS. 1 to 3, the synthetic wood body 10 has a rectangular shape, and the fitting groove 14 may be formed as an assembly structure on both sides. At this time, the fitting groove 14, for example, "T" shape, "+" shape, such as mounting brackets can be fitted with the adjacent synthetic wood.

In addition, the synthetic wood products according to the present invention may have a non-slip structure for safe walking, when constructed by stairs or walkways. Specifically, as illustrated in the figure, the synthetic wood body 10 has a rectangular shape, the concave-convex surface 16 may be formed as a non-slip structure on the upper surface. In this case, referring to FIG. 3, the uneven surface 16 may include a combination of grooves 16a and 16b having different depths. For example, as illustrated in FIG. 3, the uneven surface 16 includes a first recess 16a deeply recessed and a second recess 16b thinly sliced to about half the depth of the first recess 16a. It may include.

Hereinafter, a method for manufacturing a synthetic wood product according to the present invention. The manufacturing method described below can mass-produce the synthetic wood products of the present invention as described above in a continuous and simple process.

Method for producing a synthetic wood product according to the invention, the first step of obtaining a mixture for molding the synthetic wood body 10; A second step of extruding the composite wood body 10 by injecting the mixture into an extruder 100 (see FIG. 4); And a third step of forming the fiber reinforcement layer 20 in the synthetic wood body 10.

At this time, the mixture of the first step is as described above. Specifically, the mixture may be obtained by mixing wood flour and synthetic resin. Preferably, the mixture may be obtained by mixing 50 to 70 parts by weight of wood powder, 10 to 40 parts by weight of synthetic resin, and 2 to 20 parts by weight of inorganic filler. The mixture may further contain other additives such as stabilizers and pigments in predetermined amounts.

4 and 5, the mixture is introduced into the hopper 112 of the extruder 100. The injected mixture is extruded through the extrusion mold 120 by the rotation of the screw 114 driven by the motor (M). At this time, the synthetic wood body 10 having a predetermined shape is molded by the shape of the extrusion die 120. For example, when the cross section of the extrusion die 120 is rectangular, the plate-shaped composite wood body 10 having a rectangular cross section is molded. At this time, according to a preferred embodiment, it is good to extrusion molding so that the insertion groove 12 is formed in the synthetic wood body (10).

5 shows an exemplary cross-sectional shape of the extrusion mold 120, which shows a cross section of an extrusion mold 120 in which the composite wood body 10 as shown in FIG. 2 can be molded. As shown in FIG. 5, the extrusion mold 120 may have a convex portion 122 formed inside the rectangular mold body 121 so that the insertion groove 12 is formed in the synthetic wood body 10. In addition, the extrusion die 120 is a projection 124 to form the fitting grooves 14 on both sides of the synthetic wood body 10, and the uneven surface 16 as a non-slip structure on one surface of the synthetic wood body 10. Unevenness 126 may be formed to allow () to be formed.

On the other hand, according to a preferred embodiment of the present invention, the fiber reinforcement layer 20 may be integrally bonded and formed simultaneously with the extrusion of the synthetic wood body 10. Specifically, the fiber reinforcement layer 20 is laminated and pressed on the synthetic wood main body 10 that is extruded from the extrusion mold 120, and then dried to dry the fiber reinforcement layer 20 simultaneously with the extrusion of the synthetic wood main body 10. It is good to adhere and form. As a result, synthetic wood products can be mass-produced in a continuous and simple process. In addition, when the insertion groove 12 is formed in the synthetic wood body 10, the fiber reinforcing layer 20 is inserted into the insertion groove 12 at the same time as the extrusion of the synthetic wood body 10.

Referring to Figure 4, the non-woven fabric or mat constituting the fiber reinforcement layer 20 may be drawn out from the winding roller (R20) and laminated on the synthetic wood body (10). At this time, the non-woven fabric or mat may be impregnated in the adhesive contained in the receiving tank (C20), and then laminated on the synthetic wood body (10). And after pressurized by the pressure roller (R1), it can be dried by passing through the dryer 200. Thereafter, the product passing through the dryer 200 may be cut into a predetermined length by the cutter 300 and manufactured. In Fig. 4, reference numeral R2 is a guide roller.

Synthetic wood products according to the present invention described above may have a shape of a sheet, a panel or a lumber. In addition, the synthetic wood products according to the present invention is installed on the trail, walkway, walkway, stairs or yard of a single house, it can be usefully used as a building material for walking.

As described above, the synthetic wood product according to the present invention has excellent strength by the fiber reinforcing layer (20). Table 1 shows the strength measurement results of the synthetic wood products prepared according to the exemplary embodiments of the present invention. The following measurement results were measured by the Korea Institute of Construction Materials (1011-1 Mansu-dong, Namdong-gu, Incheon), which consisted of 60 parts by weight of wood powder, 30 parts by weight of polyethylene (PE) solution and 10 parts by weight of inorganic filler (CaCO3). After extruding the synthetic wood body 10, it is a measurement result using the product bonded to the glass fiber mat with an epoxy resin on the lower surface of the synthetic wood body 10 as a test specimen.

Test Items unit result Test Methods Flexural strength N / mm2 91 GR F 2016: 2009

Conventional synthetic wood products generally have a flexural strength of about 25 N / mm 2, the synthetic wood products according to the present invention can be seen that has an excellent strength as 90 N / mm 2 or more as shown in Table 1 above have.

10: synthetic wood body 12: insertion groove
14: fitting groove 16: uneven surface
20: fiber reinforcement layer 100: extruder
120: extrusion mold 200: dryer
300: cutter

Claims (6)

A synthetic wood body molded from a mixture comprising wood flour and synthetic resin; And
Synthetic wood products comprising a fiber reinforcing layer formed on the synthetic wood body.
The method of claim 1,
Synthetic wood body is an insertion groove is formed, synthetic wood products, characterized in that the fiber reinforcement layer is inserted, formed in the insertion groove.
The method according to claim 1 or 2,
Synthetic wood body is a synthetic wood product, characterized in that molded from a mixture comprising 50 to 70 parts by weight of wood powder, 10 to 40 parts by weight of synthetic resin and 2 to 20 parts by weight of inorganic filler.
A first step of obtaining a mixture comprising wood flour and synthetic resin;
A second step of extruding the synthetic wood body by introducing the mixture into an extruder; And
And a third step of forming a fiber reinforcing layer simultaneously with the extrusion of the synthetic wood body.
The method of claim 4, wherein
The second step is extrusion molding so that the insertion groove is formed in the synthetic wood body, and the third step is to insert the fiber reinforcement layer into the insertion groove, the method for producing a synthetic wood product.
The method according to claim 4 or 5,
The mixture of the first step is 50 to 70 parts by weight of wood powder, 10 to 40 parts by weight of synthetic resin and 2 to 20 parts by weight of inorganic filler.
KR1020100018515A 2010-03-02 2010-03-02 Synthetic wood product with excellent strength and method for manufacturing the same KR20110099468A (en)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101421338B1 (en) * 2012-04-09 2014-07-18 (주)엘지하우시스 Wood plastic composite and manufacturing method thereof
KR101434095B1 (en) * 2013-03-20 2014-09-23 전영식 Viscoelastic synthetic wood and its manufacturing method
CN108413241A (en) * 2018-02-12 2018-08-17 广东金发科技有限公司 A kind of fiber is interior to enhance wood plastic product
KR102142575B1 (en) * 2020-05-06 2020-08-10 주식회사 임성 Wood Plastic Composition having excellent Tensile Strength and Flame Retardant
KR102147815B1 (en) * 2019-11-08 2020-08-27 (주)석영에스텍 Environment friendly synthetic timber panel having improved durability and supporting force and preparation method thereof
KR102177000B1 (en) * 2020-04-08 2020-11-11 주식회사 더우드 A synthetic wood composition comprising a core-type inner reinforcement, and a high-rigidity synthetic wood manufactured by the same
KR20230086530A (en) * 2021-12-08 2023-06-15 주식회사 세창 Composite wood deck

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101421338B1 (en) * 2012-04-09 2014-07-18 (주)엘지하우시스 Wood plastic composite and manufacturing method thereof
KR101434095B1 (en) * 2013-03-20 2014-09-23 전영식 Viscoelastic synthetic wood and its manufacturing method
CN108413241A (en) * 2018-02-12 2018-08-17 广东金发科技有限公司 A kind of fiber is interior to enhance wood plastic product
KR102147815B1 (en) * 2019-11-08 2020-08-27 (주)석영에스텍 Environment friendly synthetic timber panel having improved durability and supporting force and preparation method thereof
KR102177000B1 (en) * 2020-04-08 2020-11-11 주식회사 더우드 A synthetic wood composition comprising a core-type inner reinforcement, and a high-rigidity synthetic wood manufactured by the same
KR102142575B1 (en) * 2020-05-06 2020-08-10 주식회사 임성 Wood Plastic Composition having excellent Tensile Strength and Flame Retardant
KR20230086530A (en) * 2021-12-08 2023-06-15 주식회사 세창 Composite wood deck

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