TWI391217B - Recycling method of waste interbonded polyethylene - Google Patents

Description

Recycling method for waste cross-linked polyethylene

The invention relates to a “recycling method for waste cross-linked polyethylene”, in particular to a cross-linked polyethylene crucible in a waste cable or a wire, which is recycled and remanufactured, and the material property of the reworked product is similar to the initial raw material. Method.

Because plastics are clean and hygienic, they can meet all kinds of human needs. They are cheap and can be produced quickly and in large quantities. Their excellent physical properties can also replace limited resources such as metal and wood. It is used in our daily life; among them, "XLPE: CROSS-Linked Polyethylene" is used in the field of cables and wires, and the so-called cross-linked polyethylene is in cables and wires. When the insulating layer is formed, a small amount of "crosslinking agent" PE is added, and after heating, the molecular structure is crosslinked, and the polyethylene molecular members are bridged to form a thermosetting polymer, since the crosslinked polyethylene is electrically, It is excellent in mechanical, heat-resistant, chemical-resistant and moisture-resistant properties, so it is suitable for use on cables and wires.

Moreover, because the current awareness of environmental protection is on the rise, plastic materials with good corrosion resistance should be recycled, and since the life of cross-linked polyethylene can reach 15 to 20 years, the economic benefits are extremely high, so recycling plastics becomes an economy. And important issues that are both environmentally important.

Therefore, how to effectively extract and recycle the waste cross-linked polyethylene in cables and wires, and make a re-product according to the material property of the re-product, which is similar to the original raw material, and effectively reduce the random discarding of waste plastic products. The impact caused by the environment and the economy is the technical problem that the inventors want to solve.

Therefore, the present inventors have invented the present invention in view of the above, the idea of creation and creation, the design of many years of experience, the examination of various samples and trials, and the many modifications and improvements.

Technical features to solve the problem:

In the recycling and re-manufacturing method of the waste cross-linked polyethylene of the invention, the waste cable and the electric wire are sequentially subjected to separation, disintegration, pulverization, secondary processing, mixing, melting, injection molding and the like, and the method for recycling and re-forming can be completed. Wherein: separation, the waste cable and the electric wire are longitudinally cut into a semi-circular tubular recycled plastic by a cutting machine, and the recycled plastic is a surface material of a general polyethylene, a middle layer material of cross-linked polyethylene, and an inner layer made of insulating heat-resistant polyethylene. Laminate, and when the waste cable and electric wire are longitudinally cut into recycled plastic, the inner metal wire will be simultaneously extracted and dismantled, and the surface layer and the inner layer of the recycled plastic will be removed by the planer. After the middle layer material is made and pulverized, the middle layer material of the cross-linked polyethylene material is rolled and crushed into coarse particles, and the secondary processing is performed, and the pulverized coarse particles are further processed into fine particles, mixed, and the fine particles are added to general PE or PP. The mixed chain is modified, and the bismuth is used to adjust the physical properties which are most suitable for the reworked product, to dissolve, to refine the granulated plastic material after the mixed chain is modified, to produce new granules, to shoot and shape, and to use the new granules to use the injection molding machine. The rework product is completed; thereby, it can constitute the recycling method of the waste cross-linked polyethylene.

Compare the efficacy of the prior art:

(1) The recycling and recycling method of the waste cross-linked polyethylene of the present invention, in the era of increasing raw materials, the processing of re-products by the waste polyethylene and the recycled polyethylene of the electric wire can greatly reduce the material purchase cost of the re-products, and recycle It is also more environmentally friendly after remanufacturing.

(2) The recycling method of the waste cross-linked polyethylene of the present invention, through the mixing process, can adjust the physical properties most suitable for the re-product, so as to increase the added value of recycling the waste cross-linked polyethylene.

In order to enable your review committee to have a better understanding and understanding of the purpose, features and effects of the present invention, please refer to the following [Simplified Description of the Drawings] for details:

Generally, according to the present invention, the first figure is continuously matched to the view shown in the eighth figure, and the waste cable and the electric wire (10) are sequentially separated (1), planed (2), crushed (3), and Secondary processing (4), mixing (5), melting (6), injection molding (7) and other processes, and recycling methods can be completed, wherein:

Separating (1), the waste cable and the electric wire (10) are longitudinally cut into a semicircular tubular recycled plastic (30) by a cutter (20), and the recycled plastic (30) is a surface layer (31) of a general polyethylene. The intermediate layer (32) of the cross-linked polyethylene and the inner layer (33) made of the insulating heat-resistant polyethylene, and when the waste cable and the electric wire (10) are longitudinally sectioned into the recycled plastic (30), the inner metal wire thereof will be Can be extracted synchronously;

Planing (2), the topsheet (31) and the inner layer (33) of the recycled plastic (30) are removed by a planing machine (40), and the intermediate layer (32) is left behind;

Crushing (3), the intermediate layer (32) of cross-linked polyethylene material is rolled and pulverized into coarse particles (50);

Secondary processing (4), the pulverized coarse particles (50) are further processed into fine particles (60);

Mixing (5), adding the fine particles (60) to the general PE (polyethylene) or PP (polypropylene) (70) mixed chain, and adjusting the physical properties (such as anti-resistant) which are most suitable for the re-product (90). Tensile, flexural strength, impact strength or adhesive viscosity, etc.);

Dissolving (6), refining and granulating the plastic material after the mixed chain modification, and producing new particles (80);

Injection molding (7), the new pellet (80) is completed by an injection molding machine (90), that is, the recycling method for the waste cross-linked polyethylene.

The recycling method of the above-mentioned waste cross-linked polyethylene has the following advantages: (1) in the era of increasing raw materials, the processing of re-products (90) by the cross-linked polyethylene recovered by the waste cable and the electric wire (10) will be able to Significantly reduce the purchase cost of materials for re-products (90), and be more environmentally friendly after recycling. (2) Through the process of mixing (5), it will be able to adjust the physical properties of the most suitable re-products (90) to improve recycling. The added value of cross-linked polyethylene reuse.

The above is only a preferred embodiment of the present invention, and the scope of the present invention is not limited thereto; that is, the equal variation and modification of the scope of the patent application of the present invention should still belong to the present creation. Within the scope of the patent.

Part of the invention:

(1). . . Separation

(2). . . Planing

(3). . . Crush

(4). . . Secondary processing

(5). . . mixing

(6). . . Fusion

(7). . . Injection Molding

(10). . . Waste cable, wire

(20). . . Cutting Machine

(30). . . Recycled plastic

(31). . . Surface material

(32). . . Middle layer

(33). . . Inner layer

(40). . . Planing machine

(50). . . Coarse particles

(60). . . Fine particles

(70). . . General PE or PP

(80). . . New grain

(90). . . Rework

First Figure: is a block flow diagram of the present invention.

Second Figure: A diagram of the separation state of the present invention.

Third Figure: is a plan view of the present invention.

Fig. 4 is a view showing a state in which the present invention is pulverized into coarse particles.

Fig. 5 is a view showing the state in which the coarse particles of the present invention are processed into fine particles.

Figure 6 is a diagram of the mixed state of the present invention.

Figure 7 is a state diagram of the new particles formed by the present invention.

Figure 8 is a diagram showing the state of the finished product of the present invention.

(1). . . Separation

(2). . . Planing

(3). . . Crush

(4). . . Secondary processing

(5). . . mixing

(6). . . Fusion

(7). . . Injection Molding

Claims (2)

The invention discloses a method for recycling and recycling waste cross-linked polyethylene, wherein the waste cable and the electric wire are sequentially separated, disintegrated, pulverized, reprocessed, mixed, fused, and injection molded, and the recycling and re-preparation method can be completed, wherein: Separation, the waste cable and the electric wire are longitudinally cut into a semi-circular tubular recycled plastic by a cutting machine, which is a surface material of general polyethylene, a middle layer material of cross-linked polyethylene, and an inner layer material made of insulating heat-resistant polyethylene. When the waste cable and electric wire are longitudinally cut into recycled plastic, the inner metal wire will be able to be separated at the same time; the planing machine will remove the surface layer and the inner layer of the recycled plastic by the planer, leaving the middle layer After the material is smashed, the middle layer of the cross-linked polyethylene material is crushed into coarse particles; after the secondary processing, the pulverized coarse particles are processed into fine particles; mixing, adding the fine particles to the general PE mixed chain modification俾 is used to adjust the physical properties most suitable for the re-product; solvating, refining and granulating the plastic material after the mixed chain modification, and manufacturing new granules; injection molding, using the injection molding machine to complete the new granules Product, i.e., constituting the waste deposit polyethylene recovered even by re-molding method. According to the recycling method of the waste crosslinked polyethylene according to the first aspect of the patent application, in the case of mixing, a general PP and a fine particle mixed chain may be added.