KR20070052976A - Multy layer polyethylene plate and manufacturing process - Google Patents

Abstract

The present invention is to obtain a plate by using the waste plastic in the rural area, which has emerged as a serious environmental problem in the rural area, the foreign matter, soil, etc. contained in the existing rural waste vinyl without a separate washing, sorting process without a certain size The present invention relates to a resin composite plate material and a method of manufacturing the same, obtained by extruding a plate substrate by cutting with a high temperature and high pressure extruder to extrude a desired reinforcing resin or reinforcing fiber material onto the surface of the substrate.

That is, the plastic sheet material of the present application is formed by cutting a predetermined size in a state in which the waste vinyl is not collected and then melted and extruded into a bulk size to form a substrate substrate, and on one side of the substrate or on both sides of the upper and lower sides of the substrate. Reinforcing sheet layer selected from a resin reinforcing layer or a fiber reinforcing layer is laminated on each to form a multilayer structure,

The resin reinforcement layer is selected from polyethylene, polypropylene or ABS resin, and the fiber reinforcement layer is selected from a polyester-based nonwoven fabric, a mat, an unsaturated polyester, glass fiber, and an epoxy resin. It provides a plastic sheet used.

Waste vinyl resin, resin reinforced layer, fiber reinforced layer, triple to five-layered resin plate material.

Description

Synthetic resin plate using waste vinyl and its manufacturing method {Multy layer polyethylene plate and manufacturing process}

1A: a perspective view of a resin sheet having a double layer structure of the present invention.

1B: a perspective view of a resin sheet having a triple layer structure of the present invention.

2 is a perspective view of a resin composite sheet having a five-layer structure of the present invention.

3 is a schematic process diagram for practicing the present invention.

** Explanation of symbols used in drawings **

1: 1st extruder 2, 2 ': 2nd extruder

3, 3 ': textile material winder 4: press roller

5: adhesive coating roller 6: hot press

7: cutter 8: snack bag

10: waste vinyl resin substrate 20: resin reinforced layer

30: fiber reinforcement layer 40: resin plate material

50: resin composite sheet

The plastics industry, which developed along with the development of modern industrialization, has developed remarkably with the development of the petrochemical industry. Recently, plastic products are actively used in various fields so that the production level of plastics is recognized as a measure of the economic scale of the country. Due to the superior material properties, the amount of use is reported to increase by more than 10% every year. Accordingly, the amount of waste plastic generated after use is also increasing every year.

However, at present, the recycling rate of waste plastics varies slightly from country to country, but it is only about 15% to 40%, and the remaining amount of waste plastic is partially disposed of by landfilling or incineration. It also lowers the early stabilization of the landfill due to its poor degradability, and in the treatment by incineration, some heat energy is available, but it causes a lot of economic loss and also causes social problems by releasing toxic gases such as dioxins. have.

Therefore, since the recycling of waste plastics greatly affects the industrial development of the country, it is a time for the development of technology for recycling products that can solve this problem, and the state is also operating various support systems by encouraging recycling.

Meanwhile, in the field of construction and civil engineering, plate materials are used in various forms such as formwork, balconies, interior materials, etc., which are used to mold concrete structures to a predetermined form. In the conventional building plate materials, wood plywood, Taego plywood, plastic plywood, wastewater Various types of plate materials are disclosed, such as plate or metal plate manufactured by extruding paper. Wood plywood is not waterproof and cannot be used repeatedly.However, plywood made of waste materials is less rigid and light, flexural, and workable. It is unsatisfactory and its application is being avoided.

That is, synthetic resin sheet produced by melting and extruding various kinds of mixed waste plastics is provided, but this has the advantage of longer life and better watertightness than wood plywood, but the weight of the product itself is high. In addition, in order to secure the ease of construction through light weight, formwork panels for melting and extruding by adding waste cotton, waste paper, sawdust, etc. to mixed waste plastics have been proposed, but the surface of the formwork panels is rough and rough after concrete pouring. There is a problem in that the surface of the joint between the concrete is not easily demolded, that is, there is a difficulty in peeling, and the flexural stiffness is weak, causing bending or breakage.

The present invention is to provide a synthetic resin sheet using waste vinyl discarded mainly in rural or various industrial sites in view of the above problems, to prevent the growth of agricultural vinyl house and crop growth and weed growth, which are currently mainly used in rural areas. In order to burn it, it is not easy to burn because vinyl has a long life of 1 year, and once used, it contains a large amount of this substance such as soil. In addition, even if forcibly burned, it cannot be collected due to problems such as air pollution due to a large amount of smoke and odors, and it is collected in a pile of vinyl here and there in rural areas. 400,000 tons of vinyl piles are newly piled up A it is a cause of weight.

Polyethylene vinyls have a specific gravity of 0.95 to 0.97, a melting point of about 134 ° C, and a molecular weight of several hundred thousand, which is excellent in electrical, mechanical, and chemical properties. In order to separate various wastes such as soil contained in waste vinyl from waste vinyl, it is necessary to perform a process of cutting and washing to separate them. In today's high-wage conditions, recycled products are made by recycling them. It is a situation that is left uneconomical because it cannot match economic accounting.

Therefore, in view of the above problems, the present application starts with a technical problem to find a method of utilizing waste vinyl that has been left in the rural area and recognized only as an environmentally harmful substance usefully. An object of the present invention is to provide a synthetic resin sheet utilizing the characteristics of only.

Specifically, an object of the present invention is to cut the waste vinyl containing a large amount of inorganic material in a bulk unit without washing the waste vinyl, and melt it at a high temperature and high pressure to prepare a synthetic resin substrate, and then a new resin or agent on both sides thereof. By providing the plate material with the laminated functional resin of 3, it has a certain strength and provides the synthetic resin plate with excellent physical properties such as bending rigidity and beautiful appearance.It can be used not only for building and civil engineering dies, but also for balcony, interior materials, etc. The purpose is to provide a plate that can be used.

As mentioned in the problems of the prior art and the prior art, waste vinyl is not easy to burn even if it is incinerated because it contains a large amount of foreign substances such as soil, and it is not burned even if it is forced to burn. Due to problems such as smoke and odors, while searching for a method of treating waste vinyl in a difficult state that cannot be collected and landfilled or incinerated, the waste vinyl has not been cleaned, that is, minerals containing a large amount of soil Attempted to manufacture a synthetic resin sheet by melting it at a high temperature and high pressure by cutting it in bulk units only in a containing state, and confirmed that the plate had a light and constant strength, excellent physical properties such as bending stiffness, and soundproofing effect. The invention was completed.

In addition, the present application has been found to be able to produce a plate having a strong adhesive strength when bonding the reinforcing fibers or using a polyurethane-based adhesive in order to increase the impact resistance, mechanical strength to the waste vinyl resin substrate to complete the present invention .

The present invention is extruded into a plate through the first extrusion process using waste vinyl in rural areas, and then extruded and coated with high-density polyethylene or polypropylene on the surface thereof to increase the flexibility and rigidity, and can be used as a substitute for wood at a low price Can provide plastic plates.

According to an embodiment of the present invention for achieving the above object, the waste vinyl is collected in a pile of vinyl here and there in the rural area to a waste collector with a cutter attached to a suitable size, preferably cut to a size of about 50 ~ 100 cm Transported to the factory, and flowed into the hopper of the extruder in a bulk size of about 50 ~ 100 cm without washing, melted and extruded waste vinyl at about 150 ~ 200 ℃ to form a substrate (substrate), the The reinforcing sheet layer may be laminated on one side of the substrate or on both top and bottom surfaces of the substrate to obtain a double layer board or a triple layer board.

The reinforcing sheet may be selected and used according to the purpose and use of the plate, synthetic resins may be used such as polyethylene (PE), polypropylene (PP) or ABS resin, and also a predetermined rigidity on the plate substrate It can also be used as a glass fiber sheet or SMC (Sheet Molding Compound) sheet to give a.

A binder binder may be used to stably fix the substrate and the reinforcing sheet, but more preferably, the waste vinyl substrate is extruded and the new high density polyethylene or the third new resin is extruded and integrated through a pressing roll. It can be cooled and cut to use specifications.

Generally, the melting point of waste vinyls used in rural areas is in the range of 130 ~ 170 ℃, so that the polyethylene (PE) pulverized products, which occupy a relatively large ratio, are dissolved and high melting point by maintaining the melting temperature of 150 ~ 200 ℃ in the extruder. Inorganic substances such as soil having a particle dispersed in a thermoplastic resin such as polyethylene (PE) and are bonded by the melted polyethylene (PE) melt. Thus, it was confirmed that particulate pulverized products such as soil powder distributed in the substrate in the form of particles not only reduced the weight of the plate but also had a sound insulation effect.

The present disclosure is disclosed by molding a waste vinyl resin substrate having a predetermined thickness by extruding the waste vinyl mixture at a temperature of 150 ~ 200 ℃, 50 ~ 100kgf / ㎠ in a extruder.

The method using the manufactured plate-shaped waste vinyl resin substrate may be applied to various fields. Applicants have pressed a fiber-reinforced layer on one surface of the plate-shaped waste vinyl resin substrate, and applied a thermosetting resin adhesive or impregnated the thermosetting resin. It was confirmed that a high strength synthetic resin plate could be obtained by a process of pressing by heat pressing or applying an adhesive and then pressing with a cold press.

Referring to the drawings in detail the manufacturing method of an embodiment for embodying the technical spirit of the present invention will be described.

The basic configuration of the present invention is to extrude the waste vinyl mixture containing inorganic materials such as soil powder at an extruder at a pressure of 50 ~ 100kgf / ㎠ in the temperature range of 150 ~ 200 ℃ to suit the intended use by those skilled in the art as needed Based on the waste plastic resin substrate 10 is made of a controlled thickness of.

The present application can be used to select from pigments selected from calcium carbonate (CaCO3), carbon black, organic and inorganic pigments, antioxidants, UV stabilizers, etc., as a processing aid according to the needs of the use when extrusion as the main raw material as waste vinyl, Antioxidants or UV stabilizers are preferred because they do not modify the physical properties of the resin when used within the range of 0.1 to 5% by weight of the waste resin to prevent the plate from aging or oxidizing by sunlight.

Even when the resin-reinforced layer 20 is formed on one side or both sides of the plate-shaped waste vinyl resin substrate 10, the waste vinyl resin substrate before the residual heat of the extruded plate-shaped waste vinyl resin substrate 10 is completely cooled. When the resin-reinforced layer 20 using a high density polyethylene resin is pressed using a pressure roller with a resin similar to that of (10), it is completely adhered by the residual heat of the waste vinyl resin substrate 10 to form a resin-reinforced board member. In the case of forming it on one side of the waste vinyl resin substrate 10, the resin-reinforced plate material of the double layer of FIG. 1A may be obtained, and when the waste vinyl resin substrate 10 is formed on both sides of the waste vinyl resin substrate 10. It is possible to obtain a layer of resin-reinforced board.

In addition, the strength of the plate material may be increased by forming the fiber reinforcement layer 30 on one surface or both surfaces of the substrate 10. When forming the waste vinyl resin substrate 10 on one side of the substrate 10, the double layer fiber reinforced plate material may be formed. It can be obtained, when formed on both sides of the waste vinyl resin substrate 10 can be obtained in three layers of fiber-reinforced plate material, and also shown in Figure 2 to form a resin-reinforced layer 20 on both sides of the triple-layer fiber reinforced plate material. It will be apparent from the technical idea of the present invention that it will also be possible to provide a five-layer composite plate structure.

The fiber-reinforced layer 30 not only increases the strength of the plate, but also serves to secure adhesion of the resin-reinforced layer 20 and the waste vinyl resin substrate 10 to the thermoplastic resin used in the resin-reinforced layer 20. Polyester-based nonwoven fabric or mat may be used as the fiber-like fiber, and may be selected from thermosetting resins and glass fibers such as unsaturated polyester and epoxy resin, and may be used without processing the fiber separately. However, it is more preferable to use the processing to increase the strength by pressing to a thickness of 0.1 to 50 ㎛ to improve the adhesion, the fiber-reinforced layer 30 will have a mechanical strength and impact resistance, so that the adhesive to the plate When it comes to the role of increasing the strength of the plate.

The thermosetting resin used to manufacture the composite plate using the waste vinyl resin substrate 10 may be a resin selected from melamine resin, phenol resin, urea resin, epoxy resin, and the above-described two-layer, three-layer or The 5-layered composite sheet may be manufactured by thermocompression bonding at a pressure of 500-1500 kgf / cm2 at 60-120 ° C. using a hot press.

In the manufacturing process, when the fiber reinforced layer 30 is formed between the waste vinyl resin substrate 10 and the resin reinforced layer 20 or the waste vinyl resin substrate 10 and the resin reinforced layer 20, the adhesion strength may be increased. In order to use a polyurethane-based adhesive rather than a general adhesive, it is preferable that the polyurethane-based adhesive is applied at a constant thickness while passing through a roller whose thickness is adjusted. , Pressing at room temperature with a cold press may be selected and used.

In the case of using the polyurethane-based adhesive penetrates between the fiber-reinforced layer 30 and the waste vinyl resin substrate 10, it exhibits very strong adhesive force, and the heat is generated so that the press does not need to apply extra heat to the cold press ( Even if pressurized by Cold Press, perfect adhesion is achieved.

When explaining an embodiment for obtaining a composite plate according to the present invention with reference to the drawings.

Figure 1a is a schematic diagram showing a plate having a double-layered structure of the waste vinyl resin substrate 10 and the resin-reinforced layer 20 of the present invention, Figure 1b is a waste vinyl resin substrate 10 is formed as an intermediate layer and waste vinyl The resin board | plate material 40 which shows the board | plate material which has the triple layer structure which the resin reinforcement layer 20 wrapped both surfaces of the resin substrate 10 is shown.

FIG. 2 shows a resin composite sheet material 50 having a five-layer structure in which a fiber reinforcement layer 30 is formed between the waste vinyl resin substrate 10 and the resin reinforcement layer 20. Only the resin substrate 10 is made, or a double resin plate having the vinyl resin substrate 10 and the resin reinforcement layer 20 is made, or a double resin plate having the vinyl resin substrate 10 and the fiber reinforcement layer 30 is made. Alternatively, the fiber composite layer 30 is interposed between the vinyl resin substrate 10 and the resin reinforcement layer 20 to provide a triple composite plate, or through the known compression plate manufacturing facility disclosed in FIG. It will be apparent to those skilled in the art that any modification can be made.

FIG. 3 shows an outline of an apparatus facility that can be used to manufacture the double layer or triple layer resin plate material 40 of FIG. 1A and FIG. 1B or the resin composite plate material 50 of FIG. 2. FIG. 3 shows that the waste vinyl is melted and extruded in the first extruder 1 to provide a waste vinyl resin substrate 10, and the second extruder 2 and 2 'is melted and extruded and the waste resin is melted and extruded. It shows that the resin plate 40 having a triple layer structure can be obtained by wrapping the vinyl resin substrate 10 on both sides and extruding the new resin, and using FIG. 3 to obtain a resin composite plate material 50 having a five layer structure. In the case of using the process, the waste vinyl is melted and extruded in the first extruder 1 to provide a waste vinyl resin substrate 10, and a fiber reinforced layer is provided on both sides of the waste vinyl resin substrate 10. Polyester-based nonwoven fabric or mat, unsaturated polyester, glass fiber, epoxy The fiber material or the third material selected from the paper is released from the winder 3 to form an intermediate layer (omitted to avoid complexity in the drawing, but an additional step of bonding the adhesive components together may be added), and the fiber reinforced layer Resin that melts and extrudes the new resin in the second extruder (2) (2 ') to the outside on both sides to form a five-layer structure having a waste vinyl resin substrate (10), a fiber reinforced layer (30), and a resin reinforced layer (20). A process for obtaining the composite plate 50 is disclosed.

Whether the three-layer structure or the five-layer structure is formed as described above, the material joined by the process selected is pressed by a pressure roller 4 to which pressure is applied from both sides, and if necessary, an adhesive coating roller 5 The adhesive may be introduced during the process, and a process such as applying a hot press (6) or a cold press and cutting and cooling to a required standard is known in the art. It will be apparent to those skilled in the art that the processes can be carried out as needed before and after the change.

Composite plate using waste vinyl according to the present invention is excellent in water resistance and weather resistance has an effect of increasing the number of times more than 10 times the conventional formwork plate.

In addition, the composite plate according to the present invention has a smooth surface and easy to peel off from the concrete surface, and does not need a separate finishing treatment such as plastering after removing the plate, the appearance is beautiful.

In addition, the plate according to the present invention can be used in a variety of civil engineering, construction sites, such as balconies, interior materials as well as formwork.

Claims (4)

In the method of recycling plastic waste plastic in rural areas to obtain plastic sheet, The waste vinyl is collected and cut to a certain size without washing to melt and extrude to a bulk size to form a plate-shaped substrate, and a resin-reinforced layer or fiber reinforced on each side of the substrate or on both sides of the substrate. Method for producing a plastic sheet material using waste vinyl, characterized in that to form a multilayer structure by laminating a reinforcing sheet layer selected from the layers. The method of claim 1, The resin reinforcing layer is a method for producing a plastic sheet material using waste vinyl, characterized in that selected from polyethylene, polypropylene or ABS resin used. The method of claim 1, The fiber-reinforced layer is a method of producing a plastic sheet material using waste vinyl, characterized in that selected from polyester-based non-woven fabric or mat, unsaturated polyester, glass fiber, epoxy resin used. In the plastic plate obtained by recycling the waste plastic in rural areas, The waste vinyl is collected and cut to a certain size without washing to melt and extrude to a bulk size to form a plate-shaped substrate, and a resin-reinforced layer or fiber reinforced on each side of the substrate or on both sides of the substrate. Plastic sheet material using waste vinyl, characterized in that to form a multi-layer structure by laminating the reinforcing sheet layer selected from the layers

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