KR20190064857A

KR20190064857A - Method of making board using crosslinkable polyolefine resin

Info

Publication number: KR20190064857A
Application number: KR1020170164131A
Authority: KR
Inventors: 김형기
Original assignee: 주식회사 신아케미칼
Priority date: 2017-12-01
Filing date: 2017-12-01
Publication date: 2019-06-11
Also published as: KR102036898B1

Abstract

The present invention is completed in a process of confirming the possibility of recycling by using the characteristics of a material in which waste crosslinked polyolefin resin, used and crosslinked with the sheath resin of a wire or a heat pipe and then generated in a state of being deformed into thermosetting resin, has a light weight and high strength. The technology related to the synthetic resin plate provided by the present invention is an extrusion molding method which obtains a synthetic resin plate after forming an inner foam layer by extruding waste synthetic resin to be recycled from a first extruder with an extrusion molder including a heater, and forming an outer resin layer wrapping the outer periphery of an inner foam layer by extruding new or recycled resin raw material from a second extruder. The waste synthetic resin raw material supplied from the central extrusion hole of the first extruder is extruded to form an inner foam layer by containing 40±10 wt% of waste crosslinked polyolefin resin powder and 2±1.0 wt% of a foaming agent in the waste synthetic resin raw material. Molten resin transferred from the second extruder is applied to perform a sizing process when an inner foam layer and an outer resin layer meet after sheath resin passing through an upper extrusion hole and a lower extrusion hole is extruded to the outer periphery of the inner foam layer and is discharged in a state of wrapping the inner foam layer and accordingly, the inner foam layer contains 40±10 wt% of waste crosslinked polyolefin resin powder.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a synthetic resin sheet material having a foamed resin layer and an inner foam layer obtained by using a crosslinked polyolefin resin powder,

TECHNICAL FIELD The present invention relates to a technique for extruding a synthetic resin sheet used for interior and exterior panels for building, flooring, container flooring, pedestal of a logistics floor, flooring of air and ship, The present invention relates to a synthetic resin sheet material having a structure in which an outer foam layer is formed by using a crosslinked polyolefin resin powder to obtain an inner foam layer and then an outer resin layer is wrapped around the synthetic resin sheet.

Cross-linked polyolefin resin is the most commonly used polymer as insulation part of cable. However, it is classified as thermosetting plastic and has a melting temperature range of 300 ± 50 ℃ It is not used even when heat is applied to it and is not recycled. Therefore, most of the waste-crosslinked polyolefin resin produced after being used as the outer surface of a wire or a heat pipe pipe is buried or incinerated.

However, in recent years, as means for reducing the damage of the global environment pollution, means for recycling the crosslinked polyolefin resin has been studied in order to solve the problem of causing secondary environmental pollution by embedding or incineration of the crosslinked polyolefin resin , There is a limit to the treatment method and throughput according to the increase in the amount of wastes from industrial sites and households, and there is a technology for continuously recycling the crosslinked polyolefin resin in terms of commercialization.

Korean Patent No. 10-2012-0026035 discloses a method for recycling a high-density polyethylene having a closed cross-linking structure using a supercritical fluid, and also relates to a method for recycling a crosslinked polyolefin resin, 2010-0045282 describes a regeneration method of a pulverized low density polyolefin foam using a supercritical fluid, but these techniques have adopted a batch process using a batch reactor and the cost for recycling is originally large It has no limit.

European Patent No. 0847842B1 discloses a method of pulverizing / mixing / recycling a waste crosslinked plastic material using a grinder, and European Patent No. 0897783A2 discloses a method in which a shear stress at a high temperature is increased by using an extruder to produce a pulp- European Patent No. 0897783B1 discloses a method of recycling a cross-linked polymer separated from an electric wire coating material through a cross-linking process with a shear stress at an elevated temperature using an extruder In order to recycle the waste-crosslinked polyolefin resin in the above-mentioned technology, a supercritical fluid, which is a reaction solvent, is supplied to a high-pressure vessel for application to a supercritical fluid to recover the solvent and gas after the degassing reaction. A heating device for heating the reaction mixture to a reaction temperature for In a high-pressure reactor in which an extruder cylinder connected to a heating device is used, a process of degassing and regenerating the waste crosslinked polyolefin resin using a supercritical fluid as a reaction solvent at a reaction temperature of 350 to 400 ° C and an 8 to 30 MPa reaction pressure is presented However, in actuality, the cost of recycling is so high that it is a technology that has limitations in its practical application.

However, in order to solve the crosslinking and recycle of the crosslinked polyolefin resin as described above, it takes a lot of cost, and as a result, the crosslinked polyolefin resin produced after crosslinking by using a covering resin such as electric wire or heat pipe is present The present invention relates to a method of processing a semiconductor device.

The present invention was completed in the process of confirming the possibility of recycling by taking advantage of the properties of a lightweight, lightweight and high strength material, such as a crosslinked polyolefin resin, which is produced after crosslinking with a covering resin such as a wire or a heat pipe .

In the present invention, a waste synthetic resin material to be recycled is extruded from a first extruder to form an inner foam layer by using an extruder equipped with a heater, and a new or recycled resin material is extruded in a second extruder to wrap the outer foam of the inner foam layer In the extrusion molding process for obtaining a synthetic resin sheet to form a sheath resin layer, the inner foamed layer resin contains the pulverized polyolefin resin pulverized product in the range of 40 ± 10 wt%, thereby reducing the weight of the foamed layer and increasing the strength thereof. The present invention has an object to provide a synthetic resin sheet having a wrapped structure.

In order to achieve the above object, the present invention is directed to a method of manufacturing an extruder, comprising the steps of: extruding a waste synthetic resin composition to be recycled from an extruder using an extruder equipped with a heater to form an inner foam layer; In the extrusion molding method in which a synthetic resin sheet material is obtained by forming a sheath resin layer which is extruded to surround the outer edge of the inner foam layer, 40 ± 10 wt% of the pulverized polyolefin resin pulverized material to be supplied to the waste synthetic resin material fed from the central extruder of the first extruder, And the molten resin transferred from the second extruder is extruded into the outer edge of the inner foam layer through the upper extrusion hole and the bottom extrusion hole, After the foam layer is wrapped and discharged, the inner foam layer and the sheath resin layer meet to be subjected to the sagging process, The weight of the pulverized resin repin 40 ± 10 wt% the foam layer through a configuration adapted to be contained in a range of the invention reduce confirmed that the obtained synthetic resin plate material, increase the strength to complete.

In the application process of the present invention, it is preferable that the waste pulverized product of the product in which the crosslinked polyolefin resin powder has been crosslinked so as to form the sheath of the cable or pipe pipe is pulverized to a size of 5 to 10.0 mm and used.

Therefore, the present invention relates to a structure in which a waste synthetic resin material to be recycled is extruded from a first extruder to form an inner foam layer by using an extrusion molding machine, and a raw or regenerated resin raw material is extruded in a second extruder, Crosslinked polyolefin resin pulverized material is contained in the waste synthetic resin material fed from the first extruder in an amount of 40 ± 10 wt% and the foaming agent is contained in the range of 2 ± 1.0 wt%, and melted in the extrusion dies in the range of 280 to 310 ° C. The raw or regenerated resin raw material supplied from the second extruder is extruded and passed through the upper extrusion hole of the extrusion die and the outer extrusion hole of the inner foam layer via the extrusion hole of the extrusion die Extruded, and the inner foam layer is wrapped and discharged, and then the inner foam layer and the sheath resin layer meet to apply a sizing process in a vacuum condition The present invention is a technical idea to obtain a synthetic resin sheet having a high strength by containing pulverized polyolefin resin pulverized articles of the cross-linked polyolefin resin in an amount of 40 ± 10 wt%

The present invention relates to a lightweight, lightweight and high strength material of a crosslinked polyolefin resin that is crosslinked with a sheath resin such as a wire or a heat pipe pipe and then buried in the ground in an incapable state of recycling, Which can be recycled as a synthetic resin sheet that is used for building interior and exterior panels, flooring, container flooring, floor of logistics storage floor, flooring of air and ship, .

1A is a plan view of the apparatus for producing a synthetic resin sheet according to the present invention;
Fig. 1B is a side view of the apparatus for producing a synthetic resin sheet according to the present invention.
Fig. 2 is an illustration of a synthetic resin plate provided with the technique of the present invention; Fig.

Hereinafter, an extrusion molding apparatus for producing a synthetic resin sheet according to a preferred embodiment of the present invention will be described with reference to the accompanying drawings, The application of the idea will be explained in detail.

1 is a plan view of a manufacturing apparatus for a synthetic resin sheet material according to the present invention, and FIG. 1B is a side view of an apparatus for manufacturing a synthetic resin sheet material according to the present invention. A first extruder 100 and a second extruder 200 disposed in parallel at adjacent positions on one side of the first extruder 100. The first extruder 100 and the second extruder 100, A sizing process 300 for shaping the unformed material to be extruded using the mold 200, a compression unit 400 for compressing and cooling the sizing product to a certain extent and a drawing unit 500 for drawing the product past the compression unit process ). The desired product can be obtained here through the extrusion molding apparatus of the constitution.

The process of obtaining a synthetic resin sheet to be recycled into a container floor material, a pedestal of a logistics floor, a floor material of an airplane and a ship, a floor of a cargo truck, or the like using the synthetic resin sheet manufacturing apparatus shown in FIG. 1 can be applied similarly to other technologies The feature of the present invention is that the composition of the waste synthetic resin supplied from the central extruder of the first extruder 100 is such that the wastewater from the waste plastic such as the rural vinyl is crushed to an appropriate size and supplied at a weight ratio of 50 ± 10 wt% Crosslinked polyolefin resin pulverized product is mixed in a weight ratio of 40 ± 10 wt%, and a blowing agent such as azodicarbonamide is contained in a range of 2 ± 1.0 wt% and extruded to form an internal foam layer in a weight of 100 wt% And the pulverized crosslinked polyolefin resin pulverized product is 40 ± 10 wt%, and the blowing agent is in the range of 2 ± 1.0 wt% as described above. The raw material mixture containing 100 wt% is heated to a melting point of 250 to 270 DEG C in the screw case 120 where the high temperature is applied and is sent to the head part 130, The first extruder 200 is heated to a temperature in the range of 0 ° C to 20 ° C to be introduced into the central extrusion hole 141 of the extrusion die mold 140 to form the inner foam layer 10, (PE) raw material disposed adjacent to and adjacent to one side of the hopper 210 is introduced through the hopper 210. The raw material introduced through the hopper 210 is introduced into the screw case 220 through the high- The extruded dice 140 of the first extruder 100 described above is passed through the connecting pipe 201 through the head portion 230 and is heated to a temperature ranging from -270 ° C. to 270 ° C., And is divided into an upper push-out hole 143 and a lower push-out hole 144, It is to form an outer shell resin layer 20.

2 shows a state in which the inner foam layer 10 introduced into the central extrusion hole 141 of the extrusion die 140 is regulated in the discharge amount control valve 142 to form the inner foam layer 10, When the layer 10 is extruded and divided into an upper extrusion hole 143 and a lower extrusion hole 144 provided at the upper position and the lower position of the central extrusion hole and the sheath resin layer 20 is supplied, The amount of supply is controlled by the valves 143a and 144a so that the inner foam layer 10 and the sheath resin layer 20 meet at the discharging portion 145 of the extrusion die 140 to be shaped in a vacuum condition in the syringe 300 device The operation is performed.

When the inner foam layer 10 and the sheath resin layer 20 are shaped in the siphon device 300 as described above, as shown in FIG. 1B, by using the cooler 310 of the water-cooling type, The sizing device 300 is provided with a suction hole 310 and a narrow through hole 311 formed between the suction hole 310 and the vacuum suction part 320, Is applied to perform the smoothness work.

The manufacturing process after the sizing device 300 shown in FIG. 2 will be described with reference to the drawings shown in FIG. 1B. In the back of the squeezing device 300, At least one or more pressing roller-shaped pressing devices 400 arranged at even intervals or spaced apart from each other may be used. Such a pressing device 400 includes a pair of upper and lower power-driven The pressing rollers 401 and 402 may be made of a metal having a good thermal conductivity and the pressing members 400 may be formed by passing through a sizing process 300 to form a non- The plate member 30 is appropriately pressed to increase the density of the inner foam layer 10 formed inside the shell resin layer 20 of the plate member 30 and to form a firm bonding force, So that the pressing force applied to the plate 30 gradually increases from the front to the rear, and the intervals between the upper and lower pressing rollers 401 and 402 are adjusted to gradually increase the density of the inner components of the plate rearward, 3 is obtained. The water-cooling type cooling system 430 is installed in the pressers 400 as shown in FIG. 1A to perform the secondary shaping process and the curing And the heat remaining in the unformed material passing through the pressers 400 is transferred to the presses 400. The cooling water is supplied to the pressurizing rollers 401 and 402 which absorb the heat thus heated by the pump 414, The hot water heated while being forcedly circulated is again discharged to the outside air through the heat exchanger 412 to perform the desired heat exchange so that the cooling water for the curing process of the unformed product is supplied to the compressors 400 Applying configuration it is also preferred to.

In addition, the finished product is discharged through the complete curing process by the cooling system 410 of the water-cooling type, and the secondary shaping process in addition to the pressing operation by passing through the pressers 400 as described above. And a cutter 600 is installed at a final stage to cut the produced plate into a desired size. The cutter 600 is installed at a final stage of the cutter 600, Lt; / RTI >

3 is a view showing the construction of a synthetic resin sheet 30 to which the present invention is applied. The outer sheet of the inner foam layer 10 to be embodied in the present invention is covered with a synthetic resin sheet 30, The synthetic resin sheet 30 to which the present technology is applied is such that the raw material component supplied to the central extruder of the first extruder 100 is composed of 50 ± 10 wt% of pulverized wastes, 40 ± 10 wt% of pulverized polyolefin resin pulverized wastes, + Foaming agent is contained in the range of 2 ± 1.0 wt% to form the inner foam layer 10 with the weight of 100 wt%, and the pulverized polyolefin resin crushed product 11 in the inner foam layer is contained in the range of 40 ± 10 wt% This is a technique for obtaining a synthetic resin sheet material that secures high strength.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, The scope of the present invention should be protected by the technical idea of the claims.

10: inner foam layer 11: crosslinked polyolefin resin powder
20: outer skin foam layer 30:
100: First extruder 110: Feed hopper
120: screw case 130: head part
140: extrusion die mold 141: central extrusion hole
142: discharge amount control valve 143: upper extrusion hole
144: bottom extrusion hole 145:
200: second extruder 210: feed hopper
220: screw case 230: head part
300: sizing 310: suction hole
320: vacuum suction part 400:
410: Cooling system 500: Drawing part
600: Cutter

Claims

A waste synthetic resin material to be recycled is extruded from a first extruder to form an inner foam layer by using an extruder equipped with a heater and in a second extruder a raw or regenerated resin raw material is extruded to enclose the outer resin layer surrounding the outer foam of the inner foam layer To form a synthetic resin sheet,
Crosslinked polyolefin resin pulverized product is contained in a quantity of 40 ± 10 wt% and the foaming agent is contained in a range of 2 ± 1.0 wt% in the waste synthetic resin raw material supplied from the central extruder of the first extruder to be extruded so as to form an inner foamed layer
The molten resin transferred from the second extruder is extruded through the outer extrusion of the inner foam layer through the upper extrusion hole and the bottom extrusion hole and is discharged by wrapping the inner foam layer and then the inner foam layer and the outer resin layer meet, Is applied so that the pulverized polyolefin resin pulverized product of the inner foam layer is contained in a range of 40 ± 10 wt%.

The method according to claim 1,
Wherein the waste pulverized product of the crosslinked polyolefin resin powder is subjected to a crosslinking process so as to form an outer cable of a wire cable or a pipe, and is pulverized to a size of 5 to 10.0 mm.

The waste synthetic resin material to be recycled is extruded from the first extruder to form an inner foam layer by using an extruding machine with a built-in heater. In the second extruder, the raw or regenerated resin raw material is extruded and the outer resin layer surrounds the outer- In the synthetic resin sheet of the structure,
Crosslinked polyolefin resin pulverized product of 40 ± 10 wt% and a foaming agent of 2 ± 1.0 wt% in the waste synthetic resin feedstock fed from the first extruder and melted in the extrusion die at a temperature in the range of 280 to 310 ° C., Is extruded with a molten resin forming an inner foam layer
The raw or regenerated resin raw material supplied from the second extruder is extruded and extruded through the upper extrusion hole and the lower extrusion hole of the extrusion die into the outer foam of the inner foam layer to wrap the inner foam layer and discharge the inner foam layer and the sheath resin layer And is subjected to a sieving process in a vacuum condition, so that the pulverized polyolefin pulverized product of the pulverized crosslinked polyolefin resin among the inner foam layers constituting the synthetic resin sheet is contained in a range of 40 ± 10 wt%, so that a high strength is secured.