The insulation layer, like the protective layer, shielding layer, sheath layer and conductor core, is a necessary basic component of wire and cable. It ensures that the current or electromagnetic wave or light wave transmitted by the conductor wire core only travels along the wire and does not flow outside, and also ensures the safety of external objects and people. In today's wire and cable insulation materials, plastic and rubber two categories of surface polymer materials have dominated the material, derived a wide range of types of wire and cable products suitable for different uses and environmental requirements.

The following introduces several types of wire and cable insulation materials most commonly used in production and life

First class polyvinyl chloride (PVC) material

PVC plastic is cheap, good mechanical properties, simple extrusion process, light specific gravity, oil resistance and corrosion resistance. At the same time, vinyl chloride (PVC) performance parameters are generally used to manufacture 1KV and below low-voltage wire and cable. The use of polyvinyl chloride (PVC) insulation material with added voltage stabilizer allows the production of 6KV class cables.

Polyvinyl chloride (PVC) has a certain resistance to fuel, but it will release a toxic smoke when burning, and it should not be used for occasions that need to meet the requirements of low smoke and low toxicity when burning. At the same time, polyvinyl chloride (PVC) cables are not suitable for soil containing benzene and aniline, ketones, pyridine, methanol, ethanol, acetaldehyde chemical agents, and should not be used in the environment containing trichloroethylene, trichloromethane, carbon tetrachloride, carbon disulfide, and acetic acid.

Power cable

The second category: Crosslinked polyethylene (XLPE)

Crosslinked polyethylene (XLPE) has superior electrical insulation performance, and becomes thermosetting material after polymer crosslinking, with good mechanical properties and heat resistance. It has become the leading variety of medium and high voltage power cables. Crosslinked polyethylene (XLPE) also has the advantages of simple structure, convenient manufacturing, light specific gravity, convenient laying, corrosion resistance, and simple terminal and intermediate joints. Crosslinked polyethylene (XLPE) does not contain halogens, is not flame retardant, will not produce a lot of gas and smoke when burning, if the addition of flame retardants, will make mechanical properties and electrical properties decline. Crosslinked polyethylene (XLPE) is sensitive to ultraviolet radiation.

Wire and cable

The third class of fluorine plastics

Fluorine plastics are characterized by excellent electrical insulation performance, suitable for high-frequency signal transmission, high temperature resistance, can improve the current load, good flame retardant, high oxygen index, combustion flame diffusion range is small, the amount of smoke generated is less, but also has excellent weather aging resistance and mechanical strength, not affected by various acids, alkalis and organic solvents. However, its ratio is large and expensive, and fluorine plastics are mainly used in high-temperature occasions.

Control cable

The fourth type of rubber material

Rubber insulation material using natural rubber than edge, the voltage grade is mainly 1KV can produce 6KV, good bending performance, can be laid in cold climate, especially suitable for mobile electrical equipment and often need to bend or have high flexibility requirements of the loop and horizontal height difference and vertical laying occasions, encounter oil and its compounds will soon be damaged, Oil-resistant rubber sheathed cables should be used in places where oil may often be soaked.

Equipment matching

The fifth type ethylene propylene rubber insulation

Ethylene propylene rubber material long-term allowable working temperature of 90 degrees, short-circuit thermal stability allowable temperature of 250 degrees, large temperature adaptation range, cold resistance, high temperature resistance, environmental adaptability, weathering and light resistance, oxygen resistance, ozone resistance, moisture resistance. It has been widely used in Europe and America.



Qingdao Tianxing Cable Co., Ltd. is a technology enterprise specializing in the production of wire and cable in Shandong Province, with more than 150 sets of domestic excellent cable production equipment and testing equipment, excellent production technology, modern testing equipment, to ensure stable product quality and timely supply. The company's main products are power cable, mineral cable, high life wire and cable, radiation crosslinked cable, control cable, computer cable, photovoltaic cable, communication cable, data cable, low smoke halogen free cable, flame retardant series wire and cable.