KR20010038391A - Artificial wood having excellent mechanical property and method for preparing the same - Google Patents

Abstract

PURPOSE: An artificial timber has inner layer with reinforced durability and surface layer with patterns similar to wood and is profitable by using expensive paint only on the surface layer. CONSTITUTION: An artificial timber manufacturing method comprises a step to extrude resin including 70 - 85% of PVC, 7 - 10% of shock resistant adjuvant, 2 - 4% of filler and compound stabilizer in weight ratio with reinforced mechanical property and without paints through a main extruder(20) fixed on one side of an extruding die(30) to form the inner layer of artificial timber and a step to extrude powdery and pellet-formed mixed resin through an auxiliary extruder(21) with a second hopper(10) inputting the powdery resin containing paints and wood flour and a third hopper(80) inputting the pellet-formed resin to form patterns on the surface of the artificial timber to form the surface layer on the inner layer of the artificial timber.

Description

Artificial wood having excellent mechanical property and method for preparing the same

The present invention relates to an artificial wood having excellent mechanical properties and a method for manufacturing the same, and more specifically, by applying a compounding prescription and molding technology suitable for each required characteristic of the inside and outside of the extruded extruded products, durability, economical efficiency, and various textures are applied. The present invention relates to a man-made wood and a method of manufacturing the same.

In general, building materials such as window frames, window frames, etc. are made of wood, but this is easy to deform, moisture resistance and durability is weak, there is a problem that should be frequently renovated due to very short life. Therefore, in recent years, the profile of the synthetic resin is extruded, which is a situation that is widely used as a building material, such as window frames, window frames to improve moisture resistance and durability. However, the synthetic resin profile has advantages such as low deformation and extended life, but as its surface is monochromatic, it is very monotonous because it is not harmonized with the atmosphere of indoor and outdoor, and thus has a unique and unique aesthetic sense. There was a problem in that it could not adequately cope with the demands of consumers who prefer the service.

Therefore, the sheet on which the wood grain pattern is printed is bonded or thermocompressed to the surface of the profile extruded in a single color. However, such a technique requires not only a process of printing wood grain on a thin sheet, but also a separate process of adhering or thermocompressing the sheet on which the wood grain pattern is printed on the surface of the profile. There was a problem that the productivity was significantly lowered due to excessive defects at the time of adhesion and thermocompression.

In addition, profiles made of window frames, window frames, etc. are unsightly in appearance when the sheet adhered to the surface due to transport or other carelessness, and the pattern is not formed in the grooves or the inside of the profile. There was also a problem that the degradation of quality and the expression of various patterns were very difficult.

Accordingly, Korean Patent No. 119464 discloses a method for manufacturing a profile and a device for forming a pattern such as a wood grain pattern or a marble pattern on the surface and the inside of an extruded profile. Referring again to FIG. 1, the apparatus is a hopper for supplying a mixed raw material, which is sufficiently kneaded by inserting a subsidiary material or subsidiary materials such as a stabilizer, a pigment, a filler and a lubricant into a powdered water support material in advance, to the main extruder 2 ( 1) is placed upright, and one side of the hopper 1 is provided with a coder 8 for feeding raw materials such as pellet-shaped raw materials or scraps of different shapes. The extruder has a screw shaft rotating therein and a cylinder having a heating means installed on an outer circumferential surface thereof is formed to extend laterally, and the end of the cylinder is heated according to the rotation of the screw shaft and strands the mixed raw material extruded in a paste state. The die 3 to be extruded in a state is engaged. However, the artificial wood mentioned in the patent forms a wood grain or marble pattern on the surface and the inside of the profile, so that the mechanical strength and weather resistance are weak, which limits its use as a building interior material, and due to the excessive use of pigment There is a rise in cost, and because of the use of wood powder, there was a disadvantage of falling surface texture.

Accordingly, the present inventors have developed a method for manufacturing artificial wood, which can satisfy the durability, economical efficiency, and various textures by applying blending prescription and molding technology suitable for each required characteristic inside and outside of the extruded extruded product. Was completed.

Accordingly, it is an object of the present invention to provide a low-cost artificial wood manufacturing method that can be extended to an architectural exterior material requiring excellent durability due to the excellent mechanical properties of artificial wood.

Another object of the present invention is to provide an artificial wood that is manufactured by the above method and can be extended to a building exterior material.

In the manufacturing method of the present invention for achieving the above object, in the manufacturing method of the artificial wood, by extruding the resin reinforced mechanical properties not containing the pigment through the main extruder attached to one side of the extrusion die of the interior of the artificial wood Forming a layer; And a sub-extruder attached to the other side of the extrusion die and having a first hopper into which a powdered resin containing pigment and wood powder and a second hopper into which pellet-shaped resin is injected, to form a pattern on the surface of the artificial wood. Extrusion of the powder and pellets of the mixed resin to form a surface layer on the inner layer of the artificial wood.

Artificial wood of the present invention for achieving the above another object is made by the above method is formed of the inner layer and the surface layer, the surface layer is made of a pattern formed.

1 is a view schematically showing an apparatus for manufacturing artificial wood according to the prior art,

2 is a view schematically showing an apparatus for manufacturing artificial wood according to the present invention.

Explanation of symbols on the main parts of the drawings

1: Hopper (powder injection) 2, 20: Main extruder

21: sub-extruder 3, 30: extrusion die

4, 40: cooling molding tank 5, 50: take-out

6, 60: cutter 7, 70: product loading rack

8: Side injection hole (Pellet injection) 80: Third hopper (Pellet injection)

10: 2nd hopper (powder injection) 100: 1st hopper (inner layer raw material input hole)

Hereinafter, described in more detail with reference to the accompanying drawings, a method of manufacturing artificial wood according to the present invention.

As described above, the artificial wood according to the prior art forms a wood grain or marble pattern on the surface and the inside of the profile, the mechanical strength and weather resistance is weak, limiting its use as a building exterior material, excessive use of pigment Due to the increase in manufacturing cost, there is a disadvantage that the texture of the surface falls because it does not use wood powder. Therefore, in the present invention, the wood grain or marble pattern is formed only on the surface layer without forming the wood grain or marble pattern over the surface and the inside of the profile. In other words, the inner layer of the resin is to strengthen the mechanical properties, the surface layer of the resin has a high weather resistance while prescribing a beautiful pattern.

The apparatus according to the present invention capable of manufacturing an artificial wood having such a laminated structure, referring to Figure 2, the inner layer forming powder raw material having the components and amounts shown in Table 1 on one side of the main extruder 20 The first hopper 100 for supplying to the main extruder 20 is installed upright, and the main extruder 20 is formed by inserting a screw shaft rotating therein and a cylinder in which a heating means is installed on the outer circumferential surface of the main extruder 20. The end of the cylinder is coupled to the die 30 for extruding the raw material is heated in accordance with the rotation of the screw shaft is extruded in the form of a strand.

Item ingredient Usage (% by weight) PVC P-1000 70 to 85% Impact Reinforcing Agent Acrylic modifier 7-10% filling CaCO ₃ 2 to 4% Compound Stabilizer Metal Soaps and Lubricants 3-5%

As can be seen in Table 1, the mechanical strength of the resin is reinforced by using a larger amount of impact reinforcing agent than a conventional artificial wood composition, there is an economic advantage because it does not use expensive pigments such as TiO ₂ . As such, the main extruder 20 may reinforce mechanical strength through gelling and dispersing the raw material of the inner layer.

On the other hand, on the other side of the extrusion die 30, the second hopper 10 for supplying the mixed raw material sufficiently mixed with the ingredients and amounts of surface layer forming powder raw materials shown in Table 2 below to the sub-extruder 21 is installed. On the one side of the hopper 10, a third hopper 80 into which raw materials, such as pellet-like raw materials and scraps, of the components and amounts shown in Table 3 below are put, is placed. In addition, the sub-extruder 21 also has a screw shaft rotating therein and a cylinder in which a heating means is installed on the outer circumferential surface thereof is formed to extend laterally, and the end of the cylinder is heated in accordance with the rotation of the screw shaft to form a paste. It is combined with an extrusion die 30 for extruding the mixed raw material to be extruded into a strand state. Here, the mixed raw material of the inner layer is extruded through the main extruder 20, the wood-coated molding raw material of the outer layer is formed of two layers of two raw materials in the paste state in the extrusion die 30 through the sub-extruder 21 Molded into products.

Item ingredient Usage (% by weight) PVC P-1000 70-80 Impact Reinforcing Agent Acrylic modifier 6 to 8 filling CaCO ₃ 2 to 7 Compound Stabilizer Metal Soaps and Lubricants 3 to 5 Pigment TiO ₂ 1 to 3 Blowing agent or matting agent AZO series and fine wood flour 0.1 to 0.5 Wood powder Fonggyu particle size (1 ~ 20㎛) 2-3

Item ingredient Usage (% by weight) PVC P-1100-P-1500 28-32 PVC P-1600 to P-1800 28-32 Compound Stabilizer Metal Soaps and Lubricants 3 to 5 Plasticizer Dioctylphthalate (DOP) 6 to 7 filling CaCO ₃ 1 to 3 Pigment Pigment 20-30

The form of the resin of Table 2 is a powder, it is possible to implement a natural wood texture with the matte product and the surface rough with the impact on the blowing agent or matting agent and wood powder. The particle size of the wood powder is preferably about 1 to 20㎛, but is not limited thereto. The resin of Table 3 is pellet or scrap, and the main component of PVC is PVC having an average molecular weight of 1100 to 1500 and PVC having an average molecular weight of 1600 to 1800. Natural pattern molding is possible during extrusion processing in paste state.

Therefore, the sub-extruder 21 is easy to color and shape as a whole due to the effect of increasing the gelling time and dispersibility caused by the phase difference between each raw material. That is, natural wood grain pattern can be formed by unsafe gelling due to the difference in melt viscosity of each resin between the main resin and the color pellets. In addition, the position of the sub-extruder 21 can be directly connected to the die 30 of the main extruder 20 to form a surface layer, and a wood grain pattern can be expressed on the surface. In addition, by adding wood flour to the surface layer, there is a characteristic that can feel the texture as a whole.

At this time, the size of the pellet is preferably 3 to 4 mm in diameter, 4 to 5 mm in length, and the injection ratio of the inner layer component and the surface layer component is preferably 2-3 to 1 in terms of cost and physical properties, and forms the surface layer. The injection ratio of powder and pellets can be adjusted according to the desired product characteristics within the range of 20 to 100: 1 by weight. In addition, the mixing temperature is 80 to 120 ℃, the mixing time is usually about 6 to 8 minutes, but is not limited thereto. In addition, the processing temperature in the whole extruder 20, 21 and the die 30 is about 160-200 degreeC is preferable.

Through such a device, the artificial wood of the present invention is a beautiful, woody mixed resin supplied from the second layer and the third hopper and the inner layer made of a resin reinforced with mechanical properties supplied from the first hopper 100 Made of a surface layer.

On the other hand, the powdered raw material introduced into the first hopper 100 is moved to the inside of the barrel in accordance with the rotation operation of the screw shaft is heated by the heating means into a paste state, the resin moved to the tip of the screw shaft continuously As the screw shaft rotates and pressurizes, it passes through the through hole of the brake plate and then flows into the mold means. At this time, the resin passing through the brake plate is smoothly and uniformly flows as the inclined portion is formed at the tip of the core to pass through a plurality of guide holes formed on the outer circumferential surface thereof. Then, the resin passed through the core is again moved by the pressure of the screw shaft and passes through the die member having a predetermined shape to extrude an inner layer having a profile of a window frame, a window frame or an inner layer of a building exterior material. .

In addition, the powder and pellets introduced into the second hopper 10 and the third hopper 80 are extruded to the surface layer of the artificial wood through the same process as the powder injected into the first hopper (100). At this time, the mixed resin that has passed through the brake plate is not only smoothly flowing but also uniformly mixed with resin by guide grooves formed in the inclined portion of the core and the die member, so that the pattern shape and concentration appearing in the profile are more uniform. To be formed. In addition, when the core is rotated by a worm that is rotated in accordance with the operation of the driving means, the flow of resin generated in the extruder adopting a uniaxial screw shaft becomes turbulent, thereby changing the phenomenon of irregularities into a vortex regular flow. The flow of the smooth and uniform pattern is to be formed. In addition, as the branch passage is formed in the die member, the mixing of the resin is made uniform and at the same time the flow of the resin flows more smoothly so that the pattern formed in the profile appears more uniformly.

The molded body consisting of the inner layer and the surface layer has a cooling molding tank 40 for cooling the molding agent, a take-out machine 50 for taking the molded body, a cutter 60 for cutting the molded body, and a product loading stand 70 for placing the molded body. ) Is sequentially produced as a final product.

Hereinafter, the present invention will be described in more detail with reference to Examples and Comparative Examples, but the scope of the present invention is not limited to the following Examples.

Comparative Example 1

The powdered water support material shown in Table 1 below is supplied to the hopper 1 of the apparatus as shown in FIG. In addition, pellets having the composition shown in Table 2 are supplied to the side inlet 8 of the apparatus. At this time, the size of the pellet is 2mm in diameter, 2mm in length, the injection ratio of the powder and the pellet is mixed in a ratio of 20: 1 and extruded by an extruder to obtain a profile having a pattern of wood pattern on the surface as well as inside. .

Powder raw material Item ingredient Usage (% by weight) PVC P-1000 (Hanhwa Petrochemical) 80 Impact modifier Acrylic Modifier (LG, IM 807) 6 Filler CaCO ₃ 5 Compound Stabilizer KWP-13, Kolon 5 Pigment TiO ₂ 4

Pellet raw material Item ingredient Usage (% by weight) PVC P-1300 (Hanhwa Petrochemical) 31 PVC P-1700 (Hanhwa Petrochemical) 31 Compound Stabilizer KWP-13, Kolon 4 Plasticizer Dioctylphthalate (DOP) 6 Filler CaCO ₃ 2 Pigment High color pigment 26

Example 1

The powdered water support fee shown in Table 6 below is supplied to the first hopper 100 of the apparatus as shown in FIG. To the third hopper 80 formed on one side of the hopper 10 while supplying the ingredients and the amount of the surface layer-forming powder raw material shown in Table 7 to the second hopper 10, the pellets of the component and amount shown in Table 8 Input the raw materials. At this time, the pellets had a diameter of 2 mm and a length of 2 mm, and the injection ratio of the inner layer component and the surface layer component was 1 :. The injection ratio of the powder and pellets forming the surface layer was mixed at a ratio of 20: 1, the mixing temperature was 100 ℃, and the mixing time was performed for 7 minutes. The processing temperatures of the extruders 20, 21 and the die 30 were maintained at about 180 ° C.

Item ingredient Usage (% by weight) PVC P-1000 (Hanhwa Petrochemical) 82 Impact Reinforcing Agent Acrylic Modifier (LG, IM 807) 9 filling CaCO ₃ 4 Compound Stabilizer KWP-13, Kolon 5

Item ingredient Usage (% by weight) PVC P-1000 78 Impact Reinforcing Agent Acrylic Modifier (LG, IM 807) 8 filling CaCO ₃ 5 Compound Stabilizer KWP-13, Kolon 4 Pigment TiO ₂ 2 blowing agent AZO system (Dynamic, D 300) 0.4 Wood powder Average particle about 10㎛ 2.6

Item ingredient Usage (% by weight) PVC P-1300 30 PVC P-1700 30 Compound Stabilizer KWP-13, Kolon 4 Plasticizer DOP 7 filling CaCO ₃ 2 Pigment High color pigment 27

As a result, an artificial wood having wood grains formed only on the surface layer was obtained.

Example 2

Except for using a quencher (Rhodia Copran, HP 34M) instead of the blowing agent in Table 7 of Example 1, except that the injection ratio of the powder and pellets to form the surface layer 100: 1 by weight ratio. As a result, an artificial wood having wood grains formed only on the surface layer was obtained.

As described above, the artificial wood produced in accordance with the present invention has an advantage that the inner layer is enhanced in durability, the surface layer exhibits a pattern close to the wood, as well as using an expensive pigment such as TiO ₂ only in the surface layer. .

Claims (7)

In the manufacturing method of artificial wood, Extruding a resin having mechanical properties that do not include pigments through a main extruder attached to one side of the extrusion die to form an inner layer of an artificial wood; And The pattern is formed on the surface of the artificial wood through a sub-extruder attached to the other side of the extrusion die, and having a first hopper into which the powdered resin containing pigment and wood powder is fed and a second hopper into which the pelletized resin is fed. Extruding powder and pellets of the mixed resin to form a surface layer on the inner layer of the artificial wood, characterized in that the manufacturing method of artificial wood with excellent mechanical properties. According to claim 1, wherein the mechanical properties of the resin is reinforced 70 to 85% by weight, impact modifier 7 to 10% by weight, filler 2 to 4% by weight and characterized in that 3 to 5% by weight composite stabilizer Manufacturing method of artificial wood with excellent mechanical properties. According to claim 1, wherein the powdery resin is 70 to 80% by weight PVC, 6 to 8% by weight impact modifier, 2 to 7% by weight filler, 3 to 5% by weight composite stabilizer, 1 to 3% by weight pigment, foaming agent or quenching A method for producing artificial wood having excellent mechanical properties, comprising 0.1 to 0.5% by weight and 2 to 3% by weight of wood powder. The pelletized resin according to claim 1, wherein the pellet resin has 28 to 32% by weight of PVC having an average molecular weight of 1100 to 1500, 28 to 32% by weight of PVC having an average molecular weight of 1600 to 1800, 1 to 3% by weight of a filler, and 3 to 3 stabilizers. 5 weight%, plasticizer 6-7 weight%, and pigment 20-30 weight%. The manufacturing method of the artificial wood excellent in the mechanical properties characterized by the above-mentioned. The method for producing artificial wood having excellent mechanical properties according to claim 1, wherein the mixing ratio of the powdery and pellet resins is 20 to 100: 1. The method according to claim 1, wherein the mixing ratio of the inner layer resin and the surface layer resin is 2-3: 1. The artificial wood having excellent mechanical properties, characterized in that formed by the method according to any one of claims 1 to 6 formed of an inner layer and a surface layer, the pattern is formed on the surface layer.