KR20160111105A

KR20160111105A - Pellets and a manufacturing method for a synthetic wood, and wood composite pellet using

Info

Publication number: KR20160111105A
Application number: KR1020150035813A
Authority: KR
Inventors: 박성준
Original assignee: 박성준
Priority date: 2015-03-16
Filing date: 2015-03-16
Publication date: 2016-09-26

Abstract

Disclosed are a pellet for synthetic wood and a manufacturing method thereof. The manufacturing method of a pellet for synthetic wood of an embodiment of the present invention: manufactures a primary mixture having 1-5% of the percentage water content by primarily mixing and drying 60-68 parts by weight of wood flour, 0.1-1 parts by weight of an antioxidant, and 5-10 parts by weight of a coupling agent; manufactures a secondary mixture by heating the same, after mixing 2-4 parts by weight of an impact-reinforcing agent and 0.5-1.5 parts by weight of a lubricant with respect to 100 parts by weight of the primary mixture; manufactures a tertiary mixture by mixing and heating 20-26 parts by weight of polypropylene and 2-6 parts by weight of polyethylene in the secondary mixture; and manufactures a pellet having the fixed granularity by extruding the tertiary mixture using an extruder. Provided is the pellet for eco-friendly synthetic wood, which can be replaced for natural wood.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pellet for synthetic wood, a method for producing the same, and a synthetic wood using pellets,

The present invention relates to a synthetic wood pellet and a method for producing the same, and more particularly, to a synthetic wood pellet harmless to the human body by mixing wood and a synthetic resin, a method for producing the synthetic pellet, and synthetic wood using the pellet.

Recently, as the demand for wood has greatly increased, the timber deforestation has been widespread and environmental destruction has been amplified. Especially for building materials with high demand for timber.

Under such circumstances, researches on synthetic wood having a texture and appearance similar to those of natural wood have recently been conducted. Typical examples of such synthetic wood include a mixture of wood powder, rice hull powder, pulp powder and rice straw powder in a thermoplastic resin such as polyvinyl chloride or polypropylene The composition is extruded to produce synthetic wood of suitable shape and size.

However, in the case of wood flour and rice husks, preservatives are used to prevent corrosion, which can harm the environment and health. Also, the use of a large amount of thermoplastic resin can not prevent damage caused by toxic gases generated in the plastic component when it is burned.

On the other hand, domestic patent application 10-2010-0114300 discloses pellets for synthetic wood.

It is an object of the present invention to provide an environmentally friendly synthetic wood pellet which has the same advantages as natural wood but can replace natural wood, a method for producing the pellet, and a synthetic wood using the pellet.

It is an object of the present invention to provide a process for producing a primary mixture having a moisture content of 1 to 5% by first mixing and drying 60 to 68 parts by weight of wood powder, 0.1 to 1 part by weight of an antioxidant and 5 to 10 parts by weight of a binder, ; 2 to 4 parts by weight of an impact modifier and 0.5 to 1.5 parts by weight of an active material to 100 parts by weight of the primary mixture and then heating to prepare a second mixture; 27 to 30 parts by weight of polypropylene and 10 to 16 parts by weight of polyethylene are mixed with the secondary mixture and heated to prepare a tertiary mixture; And a fourth step of extruding the third mixture by using an extruder to produce a pellet having a predetermined particle size.

The fourth step is characterized in that the extruder is heated to 180 ° C to 220 ° C and the cooling water is set to 10 ° C to 12 ° C.

Synthetic wood can be prepared by applying a binder to the surface of the pellet obtained in the above step 4 and wrapping the sheet paper.

The impact modifier in the second step is chlorinated polyethylene (CPE), and the activator includes zinc or calcium.

According to the present invention, polypropylene or polyethylene can be reinforced instead of a wobble, so that a very light synthetic pellet can be produced.

The synthetic pellets of the synthetic pellets which have not been wondered can be processed in a metal mold and then wrapped with sheet paper to produce synthetic wood, which is very light in weight and can be used for various interior materials such as interior decorations and window frames.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a flow chart illustrating a process for producing pellets for synthetic wood according to an embodiment of the present invention; FIG.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are intended to provide further explanation of the invention as claimed. It does not mean anything.

In addition, the sizes and shapes of the components shown in the drawings may be exaggerated for clarity and convenience of explanation, and the terms defined specifically in consideration of the configuration and operation of the present invention may vary depending on the intention or custom of the user, operator It should be noted that the definitions of these terms should be made on the basis of the contents throughout this specification.

1 is a flow chart illustrating a process for producing a synthetic wood pellet according to an embodiment of the present invention.

As shown, a first step (S1) of primary mixing and drying of wood powder, antioxidant and binder to produce a first mixture; A second step (S2) of mixing the impact modifier and the sheath with the first mixture and then heating to prepare a second mixture; A third step (S3) of preparing a third mixture by mixing polypropylene and polyethylene into the second mixture; And a fourth step (S4) of extruding the tertiary mixture using an extruder to produce pellets having a predetermined particle size.

In the first step (S1), 60 to 68 parts by weight of wood powder, 0.1 to 1 part by weight of an antioxidant and 5 to 10 parts by weight of a binder are first mixed and dried to prepare a primary mixture having a moisture content of 1 to 5%.

Concretely, 65 wt% of wood powder, 23 wt% of polypropylene, 6 wt% of polyethylene, 3 wt% of an impact modifier and 1 wt% of a sheath are mixed.

And 0.1 to 1 part by weight of stearic acid may be used to prevent moisture from being absorbed in the synthetic wood.

Wood flour is obtained by crushing palm shell or coke feet.

The palm shell is a by-product of squeezing palm oil and is best suited as a material for synthetic wood, but it has only been used as fuel.

This is because the moisture absorption rate of palm shells is 6 to 7 times that of wood flour, which makes it difficult to use synthetic wood because of the moisture.

However, if moisture can be removed only from the palm shell, its strength is much higher than that of ordinary wood powder. Therefore, the strength of synthetic wood produced by using palm shell as a main material is much stronger than that of synthetic wood produced using main wood powder as a main material.

Coco peat is a substance that separates the fibers from the coconut fruit husk and is very similar to the palm shell.

In other words, the water absorption rate of coco peat is 6 to 7 times that of wood powder. Therefore, even if synthetic wood is made because of moisture, it can not be used because of its strength. However, when moisture can be removed from coco peat, its strength is much higher than general wood powder The strength of synthetic wood produced by using coco peat as the main material is much stronger than that of synthetic wood produced by using the main wood as a main material.

The binder used was 5 to 10 parts by weight of Maleic Anhydride PP, which was used to bind the palm shell powder well to polypropylene and polyethylene.

In the second step (S2), 2 to 4 parts by weight of the impact modifier and 0.5 to 1.5 parts by weight of the impact modifier are mixed with 100 parts by weight of the first mixture obtained in the first step (S1), followed by heating to prepare a second mixture.

Specifically, 3% by weight of an impact modifier and 1% by weight of a shear reinforcement are used.

The impact modifier is chlorinated polyethylene (CPE).

The composition is white powder having a hardness of 65 or less, a density of 0.48 g / cm 3, and a chlorine content of 35 parts by weight based on 100 parts by weight of the impact modifier.

The active material includes zinc or calcium.

In the third step (S3), 23% by weight of polypropylene and 4% by weight of polyethylene are mixed and heated in the secondary mixture to prepare a tertiary mixture.

When the polypropylene is mixed in an amount of 30 wt% or less, for example, when the polypropylene content is 20 wt% or less, the tensile strength of the product is lowered.

Synthetic wood is recognized as wood when it contains 51% by weight or more of wood.

However, when 60 to 70% by weight of wood is added, the mixture is well mixed and the remaining polypropylene and polyethylene are uniformly mixed to improve the quality of the product.

When the polypropylene content is 40% by weight or more, the content of wood is 51% by weight or less.

When the weight of the wood is 60% by weight or more, the hardness is low and it becomes loose.

Meanwhile, step 5-1 (S5-1) of heating the pellets obtained in step 4 (S4) and molding the pellets into a mold to produce a synthetic wood; The synthetic wood can be manufactured through the 5-2 step (S5-2) of applying the adhesive to the surface of the synthetic wood produced in the step 5-1 (S5-1) and wrapping the sheet.

The sheet is a polypropylene material. By being made of wood and polypropylene and polypropylene sheet, harmless and non-toxic products can be obtained.

That is, the pellet obtained in the fourth step (S4) contains wood powder and polypropylene, and the synthetic wood is formed through the mold.

A synthetic wood which can be used as various indoor or window frames can be produced by applying a polypropylene adhesive to the surface of the molded synthetic wood and then wrapping it with a polypropylene sheet.

The adhesive is preferably a two-component polyurethane system, and is preferably a product having excellent workability and exhibiting adhesive strength in the lapping operation of the sheet, film and wood.

Good initial and state adhesive force, excellent cold resistance, chemical resistance, water resistance, and low heat shrinkage.

Among the adhesives, the urethane resin is a light yellow transparent solution, and the polyisocyanate is a blackish brown solution.

Hereinafter, an embodiment of a process for producing a synthetic wood pellet according to the present invention will be described.

(Example)

Prepare a crusher, a 1st to 3rd mixer, an extruder and a dehumidifier, and connect each crusher and mixer to the dehumidifier using a water suction pipe.

The palm shell or coco pit is put into the pulverizer and pulverized to 80 ~ 1000 mesh. At the same time, the dehumidifier is operated to absorb water to the palm shell or coco pit to prepare wood powder having a moisture content of 3 ~ 5%.

135 kg of prepared wood meal, 0.1 kg of antioxidant and 10 kg of binder are mixed and dried in a dehumidifier to prepare a first mixture having a moisture content of 2%.

Then, 6 kg of the impact modifier and 2.5 kg of the sliding material were mixed with 100 parts by weight of the primary mixture and mixed at 180 to 190 ° C. for 20 to 30 minutes. At the same time, the dehumidifier was activated to absorb moisture from the mixture to obtain a water content of 2% A tea mixture is prepared.

Thereafter, 45 kg of polypropylene and 6 kg of polyethylene were mixed with 100 parts by weight of the secondary mixture, and the mixture was mixed at 130 to 180 ° C for 20 to 30 minutes. At the same time, the dehumidifier was activated to absorb moisture from the mixture, A tea mixture is prepared.

It is necessary to reinforce the tensile property with polypropylene or polyethylene so as to have sufficient tensile properties and to precisely formulate the product.

Then, the above-mentioned tertiary mixture is poured into an extrusion molding machine to produce a pellet having a particle size of 3 to 7 mm.

On the other hand, the final pellets are heated and put into a mold, and synthetic wood is manufactured by extruding or injection molding materials such as building interior finishing materials and exterior materials in necessary shapes according to the application.

Thereafter, an adhesive is applied to the outer surface of the molded synthetic wood and the polypropylene sheet is wrapped to complete the construction material.

On the other hand, the pellets produced are put into a mold and extrusion-molded to produce synthetic wood such as building interior finishing materials and exterior materials in required shapes according to the purpose.

That is, step 5-1 (S5-1) of producing a synthetic wood by molding the pellet without piercing in a mold and molding it; The synthetic wood can be manufactured through the 5-2 step (S5-2) of applying the adhesive to the surface of the synthetic wood produced in the step 5-1 (S5-1) and wrapping the sheet.

Here, it is preferable that the mold is heated to 180 ° C to 220 ° C, and the cooling water supplied to the mold is cooled to 10 ° C to 12 ° C.

Although the present invention has been described in connection with the above-mentioned preferred embodiments, it will be apparent to those skilled in the art that various modifications and variations can be made without departing from the spirit and scope of the invention, It is obvious that the claims fall within the scope of the claims.

S1: first step S2; Step 2
S3: Step 3 S4: Step 4

Claims

60 to 68 parts by weight of wood powder, 0.1 to 1 part by weight of an antioxidant and 5 to 10 parts by weight of a binder are first mixed and dried to prepare a first mixture having a moisture content of 1 to 5%
2 to 4 parts by weight of an impact modifier and 0.5 to 1.5 parts by weight of an active material to 100 parts by weight of the primary mixture and then heating to prepare a second mixture;
27 to 30 parts by weight of polypropylene and 10 to 16 parts by weight of polyethylene are mixed with the secondary mixture and heated to prepare a tertiary mixture;
A fourth step of preparing a pellet having a predetermined particle size by extruding the third mixture using an extruder;
&Lt; RTI ID = 0.0 &

The method according to claim 1,
Wherein the impact modifier in step (2) is chlorinated polyethylene (CPE: chlorinated polyethylene).

The method according to claim 1,
Wherein the two-step slurry contains zinc or calcium. &Lt; RTI ID = 0.0 > 11. < / RTI >

The method according to claim 1,
Wherein the fourth step is heating the extruder at 180 ° C to 220 ° C and the cooling water at 10 ° C to 12 ° C.

A synthetic wood pellet produced by the production method according to any one of claims 1 to 4.

A composite material for a composite material, which is produced by the synthetic wood pellets according to claim 5,
A step 5-1 in which the pellets are heated and molded into a mold to produce a synthetic wood;
And a step 5-2 in which an adhesive is applied to the surface of the synthetic wood produced in the step 5-1 and the sheet is wrapped.

The method according to claim 6,
Characterized in that the sheet is a polypropylene material.