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Plastic materials for wire and cable
- Jul 01, 2018 -

Plastic materials for wire and cable


The plastic materials used in wire and cable mainly include: PVC, PE, PP, XLPE/XL-PVC, PU, TPE/PO.

1.PVC, polyvinyl chloride (PVC) plastic is a multi-component mixed material based on vinyl resin, according to the requirements of a variety of wire and cable, plasticizers, stabilizers, fillers, Flame retardants, processing aids (lubricants), UV absorbers, colorants and special-purpose additives are mainly used for insulation and sheathing (mainly at 70°C, 80°C, 90°C and 105°C, four temperature grades).


The basic method of determination: when burning, the yellow flame, black smoke, the bottom of the flame was green, smell bad smell.


2. PE, polyethylene has excellent electrical insulation (dielectric constant and dielectric loss tangent tgδ are small) has good chemical properties, very low permeability and low water absorption, small proportion, non-toxic, And has good plasticity, easy processing and molding; mainly used for communication cable insulation.


The basic method of determination: the surface is relatively smooth, when the flame is burning, the flame is yellow and blue, it is a liquid drop, and the smell is similar to that of a candle.


3.PP, the appearance of polypropylene is white waxy solid, more transparent, non-toxic, low water absorption (only 0.03-0.04%), flammable. With a specific gravity of 0.91, it is the smallest of the commonly used plastics. Mainly used for core insulation.


The basic method of determination: the surface is relatively smooth, harder than PE, when burning, the flame is yellow and blue, it is a liquid drop, the smell is rather unpleasant, there is a slight slight smell of the candle after the odor.


4.XLPE/XL-PVC, thermosetting material, mainly used for insulation, the highest temperature rating up to 150 °C.


Basic identification method: Cut a piece of wire rod, remove the conductor, use the fire to start burning from the middle, and then use force to break the wire and the end face is very round.


5.PU, with good physical and chemical properties, is commonly used in equipment machinery and other equipment and spring wire sheathing.


Basic identification method: with magnetic, good elasticity, expansion when burning and accompanied by liquid dripping.


6.TPE/PO, thermoplastic elastomers, low smoke, halogen-free fuel.


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