5 common plastic raw materials for wire and cable

Although the types of wire and cable are diverse, but most of the structure of the products are similar, the raw materials used are basically the same, common raw materials include conductive materials, insulation materials, protective materials, shielding materials, filling materials, etc., and according to their different properties can be roughly divided into two categories, metal raw materials, such as copper aluminum, aluminum alloy, and plastic raw materials. Common PVC, PE, PP, etc., followed are the 5 kinds of plastic raw materials commonly used in wire and cable.

1. PVC, itis the most commonly used plastic raw materials in wire and cable, PVC is generally used for wire and cable insulation and protective material, this is because PVC has a lot of good protective properties which can be a good protection of wire and cable interior, such as PVC is not easy to burn, aging resistance, oil resistance, chemical corrosion resistance, impact resistance, These characteristics makes it have a good isolation effect and protection, so the general insulation materials of wire and cable are mostly PVC materials.

2. PE(Polyethylene), its physical characteris white translucent waxy structure, has excellent flexibility, can be stretched to a certain length, lighter than water, no toxicity, but compared to PVC, polyethylene has the character of easy to burn. Even if leaves the fire, it will remain burning state, polyethylene also has many expanded varieties, including LDPE, MDPE, HDPE , LDPE is one of the lowest density, known as low-pressure polyethylene, has a very good flexibility. MDPE is medium density polyethylene, known as medium pressure polyethylene, the performance and high density polyethylene are basically similar. HDPE is also known as high pressure polyethylene, its comprehensive performance is very superior, especially heat resistance and mechanical strength are both been optimized. Polyethylene has excellent electrical insulation properties and is widely used in the insulation of communication cables.

3. EVA(ethylene - vinyl acetate copolymer), is a rubber-like thermoplastic, its performance and vinyl acetate (VA) content has a great relationship, the smaller the VA content is like polyethylene, the higher the content is like rubber characteristics, EVA has good elasticity and low temperature resistance, chemical resistance. Whilemixed with LDPE, It can improve the problem that LDPE is easy to crack, and the impact resistance, softness and hardness, and the adhesion between conductor and insulation can be well coordinated and strengthened.

4. PP(Polypropylene), it is the one thathas the smallest proportion among currently commonly used plastics, high mechanical strength, low temperature resistance, aging resistance are very superior, coupled with high breakdown strength, low water absorption characteristics, PP material can be competent for the position of high frequency insulation materials.

5. Polyester, this kind of material is characterized by high tear resistance, high wear resistance, high elasticity and low hysteresis, the upper limit of the applicable temperature could reach1500 degrees Celsius, which is much more than other thermoplastic rubber, but also has excellent oil resistance, solvent resistance characteristics.

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