JPH068249A - Recycling method for plastic products with laminating materials - Google Patents

Abstract

(57) [Abstract] [Objective] The present invention relates to a method for recycling a plastic product having a bonding material, and in particular, peeling the bonding material from a plastic body with high-pressure jet water and crushing only the plastic body for recycling. It is characterized by using. [Structure] According to the method for recycling a plastic product having a bonding material according to the present invention, the bonding material (1b) provided on the plastic material (1a) is treated with high-pressure jet water (6a) to remove the plastic material (1).
The structure is such that the plastic body (1a) is peeled from a) and crushed and recycled.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for recycling a plastic product having a bonding material, and in particular, peeling the bonding material from a plastic body with high-pressure jet water and crushing only the plastic material for recycling. For new improvements to do.

[0002]

2. Description of the Related Art Conventionally, a method of laminating and integrally molding a laminating material and a plastic body itself is relatively new, and has been widely used for automobiles in recent years. However,
At present, there is a demand for a method of reusing plastic products having this bonding material, but a method for easily separating the bonding material has not been developed, and most of them are discarded. Further, a part thereof is crushed by a crusher as it is without separating the bonding material, and it is used by molding it into a recycled product by an extrusion molding machine, a press molding machine or the like.

[0003]

The conventional method for recycling plastic products having a laminating material is only partially implemented, and the partial method for recycling is constructed as described above. There was such a problem. That is,
In the case of the above-mentioned conventional example, since the plastic product is crushed as it is, the PVC sheet or the urethane foam, which is a bonding material, and the plastic body are mixed and crushed in a separated state. The quality of recycled products of such mixed materials is of low quality, and it is difficult to use for general products, for example, since they are only used for park benches, shelves or blocks used in place of paving stones.

The present invention has been made to solve the above problems, and in particular, the bonding material is peeled from a plastic body with high-pressure jet water, and only this plastic body is crushed for reuse. An object of the present invention is to provide a method for recycling a plastic product having the above-mentioned bonding material.

[0005]

According to the present invention, there is provided a method for recycling a plastic product having a laminating material, wherein the laminating material laminated as a separate body to a plastic body is separated from the plastic body with high-pressure jet water, It is a method of crushing and recycling plastic bodies.

More specifically, it is a method of kneading and granulating the plastic body after peeling the bonding material using an extruder.

More specifically, it is a method of forming a flaw in the joint between the plastic body and the bonding material and then spraying the high-pressure jet water onto the joint.

More specifically, the plastic body is
It is a method of using any one of a door rim, an instrument panel, a bumper and the like made of a thermoplastic used in an automobile.

[0009]

In the method for recycling the plastic product having the bonding material according to the present invention, depending on the type of the bonding material,
After scratching the bonding material with a cutter knife in advance,
When high-pressure jet water such as water or steam is sprayed onto the joint between the bonding material and the plastic body so that the joint surface forms an acute angle, the bonding material is easily separated from the plastic body and only the plastic body is obtained. be able to. After that, only this plastic body is crushed and kneaded and granulated by an extruder to obtain a high-quality recycled plastic. Also, depending on the type of plastic product, 100%
It can be reused and can contribute to resource saving.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of a method for recycling a plastic product having a bonding material according to the present invention will be described in detail below with reference to the drawings. FIG. 1 is a configuration diagram showing an apparatus to which a method for recycling a plastic product having a bonding material according to the present invention is applied, and FIG. 2 is a sectional view of a door rim which is a plastic product having a bonding material.

First, the reference numeral 1 in FIG. 1 is a plastic product made up of a recovered door rim that is successively conveyed by the suspension carrier 2. The plastic product 1 is, for example, as shown in FIG. In this configuration, a bonding material 1b made of a PVC sheet, urethane foam or the like is stuck on a polypropylene plastic body 1a. The plastic product 1 is connected to the high-pressure jet water generator 5 and corresponds to the nozzle 6 for injecting the high-pressure jet water 6a in a state of being located on the water tank 4 to which the water treatment device 3 for removing solids is connected. It is configured.

Crushers 7 and 2 are located downstream of the water tank 4.
Each of the axial extruders 8 is provided, and the crusher 7 and the feeder 9 of the twin-screw extruder 8 are connected by a supply means 7A, and the twin-screw extruder 8 includes a vacuum pump 10 and a drying device. Machine 11 is connected.

Next, a case where the plastic product 1 made of the door rim is actually reproduced in the above-mentioned apparatus will be described. First, the joint 1A of the plastic product 1 conveyed by the suspension carrier 2 has a flaw (not shown) formed in advance by tapping with a cutter knife or a hammer, and at the position on the water tank 4, the nozzle 6 To high-pressure jet water 6a (about 100 to 2000 kg / cm ²
G) is strongly jetted into the joint surface 1A of the bonding material 1b and the plastic body 1a in an acute angle on the joint surface. By supplying the high-pressure jet water 6a, the bonding material 1b becomes the plastic body 1
It is peeled off from a and falls in the water tank 4, and this bonding material 1b is
It is collected and removed by the water treatment device 3. The water obtained by separating and removing the solid matter made of the bonding material 1b is reused for high-pressure jet water. The plastic body 1a from which the bonding material 1b has been peeled off by the above-mentioned processing is crushed by the crusher 7, sent to the feeder 9 of the twin-screw extruder 8 via the supply means 7A, and kneaded in the twin-screw extruder. Then, it is cut into pellets by a die 8a, granulated, and dried by a dryer 11. The dried pellet 11a is supplied into the tank 12, stored in the tank 12, and then reused as a resin material.

It goes without saying that the above-mentioned plastic product 1 may be not only a door rim but also an instrument panel or bumper of an automobile, for example.

[0015]

Since the method for recycling a plastic product having a bonding material according to the present invention is constructed as described above, the following effects can be obtained. In other words, the adhesive material can be easily peeled off with high-pressure jet water, the recovery of only the plastic body, which was not possible in the past, can be achieved easily, and the high-quality recycled plastic can be obtained, thus recycling the plastic. Can be greatly promoted.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing an apparatus to which a method for recycling a plastic product having a bonding material according to the present invention is applied.

FIG. 2 is a cross-sectional view showing a plastic product made of a door rim.

[Explanation of symbols]

 1 Plastic product 1a Plastic body 1b Laminating material 1A Joint 6a High-pressure jet water 8 Extruder

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Masashi Kato 1-1-6 Funakoshi Minami, Aki-ku, Hiroshima City, Hiroshima Prefecture Japan Steel Works, Ltd.

Claims (4)

[Claims] 1. A bonding material (1b) bonded as a separate body to a plastic body (1a) is peeled from the plastic body (1a) with high-pressure jet water (6a) to crush the plastic body (1a).
A method for recycling a plastic product having a bonding material, which is characterized by being recycled. 2. The bonding according to claim 1, wherein the plastic body (1a) after peeling off the bonding material (1b) is kneaded and granulated by using an extruder (8). Recycling method for plastic products with wood. 3. The plastic body (1a) and the bonding material (1
After forming a flaw in the joint (1A) with b), the high-pressure jet water
The method for recycling a plastic product having a bonding material according to claim 1 or 2, wherein (6a) is sprayed onto the joint (1A). 4. The plastic body (1a) is a door trim made of a thermoplastic used in automobiles,
The method for recycling a plastic product having the bonding material according to any one of claims 1 to 3, which is one of an instrument panel, a bumper and the like.