KR20140032130A

KR20140032130A - Wood polymer/plastic composite and manufacturing method thereof

Info

Publication number: KR20140032130A
Application number: KR1020120098595A
Authority: KR
Inventors: 정재열
Original assignee: (주)엘지하우시스
Priority date: 2012-09-06
Filing date: 2012-09-06
Publication date: 2014-03-14

Abstract

The present invention improves physical properties such as compression and impact strength by including bio resin derived from natural resources in addition to wood flour, which is a main raw material, and maximizes the naturalization of the product to maximize the commercialization of the product. It relates to a composite material and a method for producing the same.
The present invention for realizing this step, by pulverizing the wood or wood chips to produce a wood powder as the main raw material; Including the bio resin in the wood powder and kneading to prepare a compound (Gel) phase (Compounds); And molding the manufactured wood plastic composite material using the prepared mixture.
According to the present invention, the wood chips and long fibers cut to a predetermined length in addition to the wood powder is blended to improve the physical properties such as compression and impact strength, and to reduce the weight.
In addition, by blending the bio resin, rubber-based raw materials and additives to the mixture, each of the polymer properties are expressed, resulting in excellent moldability and maximizing the naturalization of the product, thereby maximizing the eco-friendly merchandise of the product. There is an advantage to reduce industrial waste as possible.

Description

Eco-friendly bio-wood plastic composites and its manufacturing method {Wood polymer / plastic composite and manufacturing method

The present invention relates to a wood-plastic composite, and more particularly, to an eco-friendly bio-wood plastic composite and a method for producing the same, which can maximize the naturalization of the product using a resin (Resin) derived from natural resources.

Generally, wood is widely used as a natural material, but it is weak in moisture, and maintenance cost is inconvenient due to cracking and breaking over time. The wood plastic / plastic composite (WPC) is a complement to the disadvantages of such wood.

Wood-plastic composites are hardly deformed, such as discoloration, cracking and bursting, which are disadvantages of ordinary wood. Unlike natural wood, it is especially resistant to moisture, so it does not rot easily even when used as exterior materials. Due to these advantages, natural wood and wood preservatives are being replaced, and the market size is gradually increasing.

The existing wood-plastic composite is manufactured by mixing wood flour and resin as the main raw materials. In this case, the resin uses PP, PE, PVC, ABS and the like.

However, the above-mentioned resins, which are conventionally used as raw materials for wood-plastic composites, are derived from petrochemicals, and wood-plastic composites prepared by mixing these resins cannot be recycled, and thus, industrial waste is increased. have.

The present invention has been made to solve the above-described problems, by including the bio resin derived from natural resources in addition to wood flour as the main raw material to improve the physical properties such as compression and impact strength and to maximize the naturalization of the product An object of the present invention is to provide an eco-friendly bio-wood plastic composite material and a method of manufacturing the same that can maximize the commercialization.

Eco-friendly bio-wood plastic composite manufacturing method of the present invention for realizing the object as described above, the step of preparing wood flour as a main raw material by grinding wood or wood chips; Including the bio resin in the wood powder and kneading to prepare a compound (Gel) phase (Compounds); And molding the manufactured wood plastic composite material using the prepared mixture.

In this case, the wood powder is characterized in that it is heated and dried at a temperature of 80 ~ 120 ℃ in a dryer so that the moisture content is 5 to 15% by weight.

In addition, the mixture, wood powder, characterized in that consisting of 10 to 90 parts by weight, bio resin 10 to 50 parts by weight.

In addition, the mixture is characterized in that it further comprises 10 to 90 parts by weight of long fibers.

In addition, the long fiber, corn fiber, coconut fiber, palm fiber, bamboo, reed, rice straw, cotton, hemp, wool, silk (silk) including natural fiber, glass fiber, carbon fiber, nylon any one or plurality of It is characterized by using as.

In addition, the long fiber is characterized in that the cut to form a length of 0.5 to 18 cm.

In addition, the bio resin, Bio-PE derived from sugar cane by-products, Bio-PP, characterized in that it comprises any one or a plurality of PLA derived from starch (Starch).

In addition, the mixture is characterized in that it further comprises 10 to 50 parts by weight of the rubber-based raw material.

In addition, the rubber-based raw material is characterized in that it optionally comprises any one or a plurality of synthetic rubber, natural rubber, recycled rubber.

In addition, the reclaimed rubber is characterized in that it optionally comprises any one or a plurality of articles made of waste tires, elastic blocks, tubes, rubber raw materials.

The mixture may optionally contain one or more additives selected from the group consisting of 0.1 to 50 parts by weight of a compatibilizer, 0.1 to 50 parts by weight of a filler, 0.1 to 30 parts by weight of an antioxidant, 0.1 to 30 parts by weight of a lubricant and 0.1 to 30 parts by weight of a pigment, .

Further, the wood chip is cut to a length of 0.5 to 18 cm.

In addition, the prepared mixture is characterized in that it is produced from a wood plastic composite through any one of extrusion, injection or press molding.

Eco-friendly bio-wood plastic composite material according to the invention is characterized in that it is manufactured according to any one of the manufacturing method of the plurality of the above-described manufacturing method.

According to the present invention according to the configuration as described above, wood chips and long fibers cut to a predetermined length in addition to the wood powder is blended to improve the physical properties such as compression and impact strength and to be lightweight.

In addition, by blending the bio resin, rubber-based raw materials and additives to the mixture, each of the polymer properties are expressed, resulting in excellent moldability and maximizing the naturalization of the product, thereby maximizing the eco-friendly merchandise of the product. There is an advantage to reduce industrial waste as possible.

Hereinafter, a preferred embodiment of the present invention will be described in detail.

Eco-friendly bio-wood plastic composite manufacturing method according to the present invention, by pulverizing the wood or wood chips to prepare a wood powder as the main raw material, the bio- resin containing a bio resin in the wood powder and kneaded by mixing (Gel) ) And forming a plastic composite using the mixture prepared above.

The configuration of the present invention will be described in more detail as follows.

First, the wood powder is put into the dryer so that the moisture content is 5 to 15% by weight after the pulverization manufacturing is subjected to a drying process for heating to a temperature of 80 ~ 120 ℃. If the drying temperature of the wood powder is below 80 ° C, it takes a long time to dry. When the drying temperature is above 120 ° C, the dense structure of the wood powder itself is distorted due to rapid drying.

Through this drying process, the moisture content of wood flour is dried to 5 to 15% by weight. Thus, when the moisture content is maintained at 5 to 15% by weight, smooth mixing with other raw materials is achieved without adding a separate binder. . If the water content is more than 15% by weight, as the moisture in the wood powder evaporates during the manufacture of the wood-plastic composite, bubbles are generated, which weakens the bonding force when blending. Accordingly, there is a problem that a defective product is generated.

In addition, the mixture may be made of wood flour (Wood Flake Chip), long fiber (Long Fiber) and any one or a plurality of bio resins in addition to the main raw wood powder.

In this case, it is preferable that the wood chip is cut to have a length of 0.5 to 18 cm. That is, when the length of the wood chip is cut to 0.5 cm or less, it is difficult to expect improvement in physical properties such as compression and impact strength because it is not different from the case of using the conventional wood powder as the main raw material. On the contrary, when the length of the wood chips is cut to 18 cm or more, it is difficult to proceed with the mixing and molding process of the wood chips and rubber-based materials.

The long fiber is preferably formed by cutting to a length of 0.5 ~ 18cm. That is, when the long fiber is formed to have a length of 0.5 cm or less, there is no significant difference compared to the case of using conventional wood powder, and it is difficult to expect improvement in physical properties such as compression and impact strength. On the contrary, when the length of the wood chips is cut to 18 cm or more, it is difficult to proceed with the mixing and molding process of the wood chips and rubber-based materials.

In this case, the long fibers may be corn fiber, coconut fiber, palm fiber, reed, bamboo, rice straw, cotton, hemp, wool, silk, natural fiber such as silk, reinforced polymer fiber and steel such as nylon, and the like. One or a plurality of steel wires may be selectively used. In this case, the lower the water content of the wood chips and long fibers, the better the moldability of the wood-plastic composite material, for example, the water content of the wood chips and long fibers, such as in the case of wood flour to maintain 5 to 15% by weight It is preferable to perform a predetermined drying process.

The bio resin may optionally include any one or more of Bio-PE derived from sugar cane by-products, Bio-PP, PLA derived from starch, and other bio resins derived from nature. can do.

In this case, the PLA (Poly lactic acid) resin is a thermoplastic polyester of lactide or lactic acid, and may be prepared by polymerizing lactic acid prepared by fermenting starch extracted from corn, potato, and the like.

Such wood chips, long fibers and bio resins are mixed with wood flour together with rubber-based raw materials and additives to form a mixture. In this case, the rubber-based raw material may be made of any one or a plurality of synthetic rubber, natural rubber, recycled rubber. At this time, the reclaimed rubber may be made of waste tires, elastic blocks, tubes, articles made of rubber materials, and the like.

Here, preferably, the mixture is wood powder, wood chips or long fibers 10 to 90 parts by weight, bio resin 10 to 50 parts by weight, rubber-based raw material 10 to 50 parts by weight, compatibilizer 0.1 to 50 parts by weight, filler 0.1 to 50 parts by weight, 0.1 to 30 parts by weight of antioxidant, 0.1 to 30 parts by weight of lubricant, and 0.1 to 30 parts by weight of additives are selectively added to the inside of the kneader, respectively, and then prepared through a kneading process for a predetermined time.

Mixed The prepared mixture is made into a wood plastic composite through a predetermined molding process. In the present invention, it is preferable to perform a molding process using an extrusion method of wood plastic composite material, but is not limited to this can be manufactured using a method such as injection, press, of course.

Molded wood-plastic composites are used for exterior walls of buildings, roof or residential fences, terraces, walkway floors, and the like.

Eco-friendly bio-wood plastic composite material according to the present invention as described above, wood chips and long fibers cut to a predetermined length in addition to the wood powder is blended to improve the physical properties such as compression and impact strength, and to be lightweight do.

In addition, by blending the bio resin, rubber-based raw materials and additives in the mixture, each of the polymer properties are expressed, resulting in excellent moldability and maximizing the naturalization of the product, thereby maximizing the eco-friendly merchandise of the product. It is possible to reduce industrial waste.

Claims

Pulverizing wood or wood chips to produce wood powder as a main raw material;
Including the bio resin in the wood powder and kneading to prepare a compound (Gel) phase (Compounds); And
Eco-friendly bio-wood plastic composite manufacturing method characterized in that it comprises a; forming the molded plastic composite wood using the prepared mixture.

The method of claim 1,
The wood-
Eco-friendly bio-wood plastic composite manufacturing method characterized in that the heat content is dried to a temperature of 80 ~ 120 ℃ in a dryer so that the moisture content of 5 to 15% by weight.

The method of claim 1,
The mixture may contain,
Wood flour, wood chips 10 ~ 90 parts by weight, bio resin 10-50 parts by weight comprising the eco-friendly bio-wood plastic composite manufacturing method.

The method of claim 3,
The mixture may contain,
Eco-friendly bio-wood plastic composite manufacturing method comprising 10 to 90 parts by weight of long fibers.

5. The method of claim 4,
The long fiber,
Corn fiber, coconut fiber, palm fiber, bamboo, reed, rice straw, cotton, hemp, wool, silk, natural fiber including silk (silk), characterized in that optionally using any one or more Eco-friendly bio wood plastic composite manufacturing method.

6. The method of claim 5,
The long fiber, eco-friendly bio-wood plastic composite manufacturing method characterized in that the cut is formed in a length of 0.5 ~ 18cm.

The method of claim 3,
The bio resin,
Bio-PE and Bio-PP derived from sugar cane by-products, PLA-derived from starch (Starch) Any one or a plurality of environmentally-friendly bio-wood plastic composite manufacturing method characterized in that it comprises.

The method of claim 3,
The mixture may contain,
Eco-friendly bio-wood plastic composite manufacturing method characterized in that it further comprises 10 to 50 parts by weight of the rubber-based raw material.

9. The method of claim 8,
The rubber-based raw material,
Eco-friendly bio-wood plastic composite manufacturing method characterized in that it comprises any one or a plurality of synthetic rubber, natural rubber, recycled rubber.

10. The method of claim 9,
The recycled rubber is,
Eco-friendly bio-wood plastic composite manufacturing method, characterized in that it comprises any one or a plurality of waste tires, elastic blocks, tubes, articles made of rubber raw materials.

The method of claim 3,
The mixture may contain,
0.1 to 50 parts by weight of a compatibilizer, 0.1 to 50 parts by weight of a filler, 0.1 to 30 parts by weight of an antioxidant, 0.1 to 30 parts by weight of a lubricant, and 0.1 to 30 parts by weight of an additive. Eco-friendly bio wood plastic composite manufacturing method.

The method of claim 3,
The wood chip, eco-friendly bio-wood plastic composite manufacturing method characterized in that the cut is formed in a length of 0.5 ~ 18cm.

The method of claim 1,
The prepared mixture,
Eco-friendly bio-wood plastic composite manufacturing method characterized in that the production of wood-plastic composite through any one of extrusion, injection or press molding.

Eco-friendly bio-wood plastic composite prepared according to any one of claims 1 to 13.