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What is the meaning of PVC, PE, XLPE in cable materials, what is the difference?

تاريخ التحميل: 2019-02-26
المشاهدات: 6

PVC (polyvinyl chloride) - excellent mechanical properties, good electrical properties, stable to the atmosphere and acid, alkali, organic chemicals, and has a certain resistance to corona, moisture, and flame retardant, simple processing, low cost Widely used in insulation and sheathing.

       PE (Polyethylene) - is a milky white plastic that is waxy and transparent. It is an ideal insulation and sheathing material for wire and cable.

Advantages: 1 excellent electrical performance. High insulation resistance and electric strength. In a wide frequency range, the dielectric constant and dielectric loss tangent are small and are not affected by frequency variations. As an insulating material for communication cables, it is an almost ideal medium. 2 good mechanical properties, flexible, strong, and good tolerance. 3 aging resistance, low temperature and cold resistance and chemical resistance. 4 good water resistance, low water absorption. 5 high gas permeability, light weight, good processing performance, not easy to decompose.

Disadvantages: The melting temperature is low (140~160°C). In the event of an accident short circuit or severe overload, it will cause damage to the line due to melting and flowing of polyethylene.

XLPE cross-linked polyethylene - chemically or physically, the double bonds in the chain macromolecules are opened, and the double bonds of other macromolecules are connected to form a three-dimensional, interconnected molecular structure that is cross-linked. After being cross-linked, the polyethylene changes from thermoplastic to thermosetting material, and the physical and mechanical properties are greatly improved, and the thermal properties are remarkably improved.


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