The raw materials used for rubber sheathed cables such as yc ycw yz yzw in wires and cables include copper and rubber.

The insulation and sheath materials are both made of rubber, which is further divided into EPDM, chloroprene rubber, and other types of rubber materials.

Both EPDM rubber and chloroprene rubber are commonly used raw materials for rubber cables. With the fierce competition in market prices, processes, and construction periods, many manufacturers will use slightly lower priced non vulcanized polyethylene instead of rubber materials. This material is difficult to distinguish for customers who are not very knowledgeable in professional technology, even if most professional cable manufacturing companies are not experienced technicians. Although the use of this non vulcanized polyethylene is lower in price, shorter in construction period, and eliminates many tedious processes in the process, there is still a significant difference between this material and real rubber, especially in terms of performance.

Below we will analyze the application and discrimination of two materials:

Raw material usage process and application:

The processing flow of EPDM rubber is very complicated. The original rubber and other fusion materials are mixed in a special formula and then refined, solidified, pressed, and made into film by rubber mixing equipment. When producing cables, the rubber cable rubber extrusion equipment is used to melt the film and make the insulation or sheath of the cable. After vulcanization through the steam pipeline connected by the rubber extrusion equipment, it becomes a rubber sheathed cable that can be used in industry.

Non sulfurized polyethylene is different. Firstly, the raw materials are in granular form, which is more convenient to use. After melting through extrusion equipment, it directly becomes the insulation and sheath of the cable.

Appearance

The appearance of rubber is flat and dull, while non vulcanized polyethylene has a glossy or matte finish.

feel:

The feel of rubber cables is relatively heavy when held in the hand, as their specific gravity is slightly higher than other materials, giving them a noticeable sense of heaviness and strong toughness, with a rich and soft feeling mixed with rigidity; Non vulcanized polyethylene is relatively lightweight, with a light specific gravity and a noticeable softness compared to rubber.

smell

The method of smelling odors requires a certain level of knowledge and understanding of these two materials in order to distinguish them. Rubber cables have a strong odor, which is unpleasant but not pungent. After burning, they have a certain fragrance when smelled; The odor of cables made of sulfur free polyethylene is not very strong, and there is no obvious odor before combustion, but the odor after combustion is very pungent.

In addition, there are significant differences between the two materials during use. Rubber cable yzyc should be made of rubber material according to standards, which is more wear-resistant, aging resistant, and has insulation or sheath performance that meets the requirements and standards for use. If sulfur free polyethylene is used instead of rubber as the insulation and sheath of the cable, although the cable has no problems for a period of time, it will have obvious hardening or cracking characteristics after one or two years, greatly shortening the service life of the cable.

Summary: Both materials have their own advantages and disadvantages, and whether it is for the user or the manufacturer, each material has its own strengths and weaknesses to choose reasonably according to their needs.

This article is edited by Li Chao from Tianjin Cable Factory Branch

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