KR20020091438A - Reproduced board of PVC/ABS scrap and method thereof - Google Patents

Abstract

PURPOSE: Provided are a recycled, laminated scrap board of PVC(polyvinyl chloride)/ABS(alkyl benzene sulfonate), which is produced by recycling a scrap of the PVC/ABS mixture resin molding, and thus can reduce environmental pollution and economic loss resulting from discarding or incineration of the scrap, and a method for producing the same. CONSTITUTION: The board consists of a substrate(1), which is formed by collecting and crushing a scrap of PVC/ABS plastic resin board such as a building panel, and passing the crushed scrap through a pair of roller to mix the crushed scrap, and re-mix the mixture in a pair of roller, calendering the mixture at 140-200 deg.C; and a printing sheet(2) having desired pattern, which is positioned on the substrate, wherein the substrate laminated with the printing sheet is formed by rolling with hydraulic heat/multi-step pressure.

Description

Recycled PCB / ABS scrap plate material and its manufacturing method {Reproduced board of PVC / ABS scrap and method etc}

The present invention relates to a PVC / ABS mixed scrap plate material and a method of manufacturing the same.

In general, plastic resin building plate has been mainly made of only the ABS component. However, the plate made of ABS alone absorbs the moisture in the air, which has a bad effect on the product when manufactured.

Therefore, recently, laminated products of PVC / ABS mixed panel and sheet mixed with PVC having strong hygroscopic resistance have been widely used as various plastic building plate materials.

However, PVC / ABS-laminated products have excellent advantages such as hygroscopicity, formability, smoothness, adhesion, and flame retardancy.However, a large amount of scrap generated after manufacturing PVC / ABS-laminated products is a large industrial waste. There was a problem that the treatment was difficult.

In general, in the case of plastic sheet, scrap, which is a scrap of the sheet and waste scrap after use, is used as a recycling resource to some extent by a melt extrusion method.

However, the plate mixed with PVC and ABS could not be reprocessed into the plate by the conventional melt extrusion method due to the different melting point of PVC and ABS. In other words, since the melting point of PVC and ABS is different, the PVC material burns when a lot of heat is applied, and the ABS material is not melted when the heat is given less. Therefore, it is difficult to recycle the PVC / ABS mixed product, and most of it is disposed of as waste.

Therefore, PVC / ABS mixed resin waste has emerged as a social problem in terms of incineration and environmental protection during disposal.

Therefore, in view of these problems, the present inventors recycle the scraps of these mixed resin molded articles by forming a plate through a calendering and rolling process with appropriate heat, instead of melt-extruding scraps mixed with PVC and ABS having different melting points. It has come up with a way to do this, and thus provides a way to substantially reduce environmental pollution and economic losses resulting from the disposal or incineration of scrap.

1 is a perspective view of the finished recycled PVC / ABS mixed scrap plate of the present invention,

Figure 2 is a block diagram showing the manufacturing process of recycled PVC / ABS mixed scrap plate material of the present invention,

3 is a process chart of a calendering process in a manufacturing process of recycled PVC / ABS mixed scrap plate material according to the present invention;

Figure 4 is a process chart of the rolling process by the hydraulic heat pressure after the calendering process of FIG.

<Explanation of symbols for main parts of the drawings>

1: Substrate 2: Pattern Sheet

3: mold plate 4: steam or heat transfer plate

5: rolling roll

The PVC / ABS mixed scrap sheet material of the present invention is to collect and crush the scraps of the mixed plastic resin molded article while mixing the crushed scrap while passing between the roller pairs, and then the mixture is passed again between the roller pairs, and mixed again. After the second mixing, a flat substrate formed by calendering at a temperature of 140 to 200 ° C. and a printing sheet having a desired pattern are bonded to the substrate, and the joining plate is formed by pressing the substrate on which the printing sheet is laminated onto a hydraulic thermal stage presser. It is characterized by being formed by putting through a rolling process.

In other words, the PVC / ABS mixed scrap plate of the present invention is a step of collecting and crushing the plate scrap of PVC / ABS mixed plastic resin; Primary and secondary mixing processes in which the crushed scraps are mixed while passing through the roller pairs to be uniformly mixed, and then the mixture is passed again between the roller pairs to be mixed; Forming a substrate by calendering the scrap uniformly mixed through the first and second mixing processes at a temperature of 140 to 200 ° C; Laminating a printing sheet of a desired pattern on the substrate; The substrate on which the printing sheet is stacked is placed in a glossy or matt mold plate and a hydraulic thermal stage presser having steam or heat transfer plates installed up and down outside the mold plate, and having a pressure of 10 to 150 kg / cm 2 depending on the thickness and physical properties of the predetermined product. , A process of rolling at a temperature of 140 to 200 ° C., a process of cutting to a desired size and shape, and other finishing processes.

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

1 is a perspective view of the completed PVC / ABS mixed scrap plate of the present invention, Figure 2 is a block diagram showing the recycling process of the PVC / ABS mixed scrap plate of the present invention, Figure 3 is PVC / ABS mixing according to the present invention It is a process chart of the calendering process which is one process at the time of manufacture of a scrap board material, FIG. 4 is a process chart of the rolling process by a hydraulic heat pressure after the calendering process of FIG.

PVC / ABS scrap, which is the main raw material of the PVC / ABS mixed scrap sheet material of the present invention, is mainly used to decompose pieces of water and waste after use in the manufacture of building panels.

First, the PVC / ABS scrap is further pulverized, mixed, and passed through a calendering roller at an appropriate temperature in the same manner as in FIG. 3 to form a PVC / ABS mixed substrate 1.

The mixing process is carried out in the first and second stages, and the first mixing is first passed through a pair of rollers so that the pulverized scrap is uniformly mixed, and then the mixture of the first mixed PVC / ABS scrap is again mixed. Mix 2nd while passing between a pair of rollers. As a result of the first and second mixing processes, PVC and ABS are mixed evenly over the entire substrate 1, and the surface of the substrate 1 is pressed more smoothly and cleanly, and the moisture in the substrate 1 completely escapes. There is.

The mixture of PVC / ABS scrap which has undergone the first and second mixing processes passes through four rollers 5 arranged as shown in FIG. 3 and becomes a flat substrate 1 which is further compressed through a calendering process. At this time, when the rollers 5 are arranged in a line as shown in FIG. 3, the area to be compressed is widened, which is advantageous.

The substrate 1 is pressed while being uniformly mixed with each other by passing through the calendaring roller 5 at 140 to 200 ° C. If the temperature is less than 140 ° C, the ABS material is not melted and is not processed, but the temperature is 200 ° C or more. When calendering, the PVC material burns out and cannot be worked. Therefore, it is very important to keep the temperature within the above range in the process of forming the substrate 1.

Thereafter, the printing sheet 2 for pattern formation is laminated on the substrate 1, and the steam or heat transfer plate 4 is disposed on the outside of the mold plate 3 and the glossy or matt mold plate 3 arranged in two rows. Entering the hydraulic thermal multi-stage press is configured to go through a rolling process (see Figure 4).

The mold plate 3 may be made of steel, stainless steel, or plastic, and the mold plate 3 made of plastic is used as the shape of the pattern to be carved on the surface of the product is more complicated and varied, such as round or embossing. Although it is difficult to express, it is preferable to use a mold plate 3 made of steel or stainless steel when making a product that is strong and long-lasting, and a glossy or matt mold plate 3 may be used depending on the characteristics of the product.

Since the substrate 1 is composed of two components, PVC and ABS, in the rolling process, the hydraulic thermal multi-stage press is applied at a suitable pressure within 10 to 150 kg / cm 2 and an appropriate temperature within 140 to 200 ° C. depending on the thickness and physical properties of the predetermined product. It sets and rolls the board | substrate 1 with which the printing sheet 2 was stuck.

PVC / ABS mixed scrap plate formed through such a process is cut to a desired size and shape, and then the product is subjected to other finishing process. Of course, the scrap generated at this time can be reused continuously by the method according to the present invention.

<Example>

Scraps of PVC / ABS laminated building panels were collected and ground finely.

The crushed scraps were passed through a pair of rollers for first mixing, and then the mixture was passed through another pair of rollers for secondary mixing to ensure uniform mixing.

The first and second mixed PVC / ABS scrap mixture was passed through a four-stage calendar roller set at a temperature of 180 ° C to form a substrate.

The printing sheet having a desired pattern was placed on the formed substrate, and then, the resultant was placed in a hydraulic die press equipped with a matte metal mold plate made of stainless steel and a heat transfer plate installed above and below the mold plate, and rolled at a pressure of 100 kg / cm 2 and a temperature of 180 ° C. .

After the calendering process and the rolling process in the same manner as above to make a PVC / ABS mixed scrap plate material was cut to the desired size and shape to prepare a panel for plastic home doors.

The recycled plastic panel home door manufactured by the above process did not have any significant difference in quality compared to the product made of the first laminated PVC / ABS plate, and after the plastic home door was manufactured, the scrap generated was collected again. By repeating the processes of grinding, mixing, calendering and rolling in the same manner as above, scraps could be continuously reused without scraps discarded.

PVC / ABS mixed scrap plate according to the present invention made in such a process is excellent in hygroscopicity, formability, smoothness, bonding to the print sheet, flame retardancy, according to the method of manufacturing the PVC / ABS mixed scrap plate of the present invention In this case, it solves the problem of waste, which is a problem at each manufacturing plant in the same field, and can reduce the cost by more than 1/2 by collecting and recycling industrial waste discarded in the workplace, and can reuse it continuously. As it can reduce industrial waste, it is possible to save resources in Korea where resources are scarce, and to prevent harmful substance emission and air pollution due to incineration of waste, which has considerable benefits in terms of environmental protection.

In addition, the PVC / ABS mixed scrap plate of the present invention is an optimal product, such as the surface of the door, lightweight partition surface, interior finishing materials, building materials decorative plate, it can be recycled waste material for building materials.

Claims (2)

After collecting and crushing scraps of PVC / ABS plastic resin sheet such as building panels and mixing the crushed scraps through a roller pair, the mixture is mixed again in a roller pair and then mixed first and second, and then 140 to 200 ° C. A substrate formed by calendering at a temperature of; Consisting of a printing sheet of a desired pattern located on the substrate, The recycled PVC / ABS mixed scrap plate material, characterized in that the substrate on which the printing sheet is laminated is formed by a rolling process using a hydraulic thermal multi-stage press. Collecting and crushing sheet scrap for building materials of PVC / ABS mixed plastic resin; Primary and secondary mixing steps of passing the first crushed scraps through the roller pairs and mixing the mixture again through the roller pairs so that the crushed scraps are uniformly mixed; Calendering the scrap uniformly mixed through the first and second mixing processes at a temperature of 140 to 200 ° C. to form a substrate; Laminating a printing sheet of a desired pattern on the substrate; The substrate on which the printing sheet is laminated is passed through a polished or matt mold plate and a hydraulic thermal stage presser having steam or heat transfer plates installed up and down outside the mold plate, depending on the thickness and physical properties of the product. Rolling at a pressure of 140 to 200 캜 A process for producing recycled PVC / ABS mixed scrap plates comprising a process of cutting to a desired size and shape and other finishing processes.