Compounds for Power Cables

A silane grafted crosslinkable polyethylene compound, curable by exposure to moisture, for insulation of power cables and possessing excellent extrudability at high out put rate.

PP 408 is based on a high molecular weight polymer and has melt index in the range of 0.5 to 0.8. It has especially developed for low voltage cable insulation and for sheathing purpose.

This compound utilizes the system for cross - linking of polyethylene developed by DOW Corning and known as Sioplas. It is a two component system comprising a silylated ethylene polymer known as the graft copolymer PP 408 , and a master batch PP 401 containing a cross - linking catalyst. The two materials normally used in the ratio of 95 parts graft to 5 parts catalyst master batch.

Stored separately, these materials are fairly stable but when mixed and exposed to moisture , cross linking takes place.

This system allows the compound to be extruded as a normal thermoplastic which will then attain a high level of cross linking in the processed from . The finished product has all the properties associated with polyethylene cross linked by other methods.