The peroxide crosslinked cable compounds (PEX-A) are mainly used in the wire and cable industry as an insulating material for medium and high-voltage power cables. The compounds must strictly meet the quality requirements, such as cleanliness, dielectric strength, and lifetime. In the first step, polymer and additives are mixed at a narrow temperature range to reach a homogeneous status and then filtered and pelletized. In the second step, liquid peroxide is precised metered, and combined with the pellets. The entire process must be precisely controlled to obtain high-purity products.
Peroxide XLPE (Peroxide cross-linkable polyethylenes) is made by mixture, plasticization and granulation with the low-density polyethylene as the basic resin mixed with cross linking agent and other additives. XLPE insulation is effective at high and low temperatures. Due to its unique structure, XLPE is not only extremely resistant to wear but also resistant to high voltage electricity, chemicals and other harmful substances. Cross-linked polyethylene insulation is also a more affordable option. Peroxide cross-linkable XLPE is increasingly used for medium voltage and high voltage AC cable insulation.