Silane quickly cross-linked polyethylene cable material

Abstract

The invention discloses a silane quickly cross-linked polyethylene cable material and belongs to the technical field of electric wire and cable materials. The silane quickly cross-linked polyethylene cable material is characterized in that: a base material comprises the following components: 40 to 85 parts of low density polyethylene (LDPE) and 15 to 60 parts of linear low density polyethylene (LLDPE); a catalyst master batch comprises the following components: 100 parts of low density polyethylene (LDPE) which is one or a mixture of more polyethylenes, 1 to 10 parts of antioxidant, 1 to 10 parts of copper inhibitor, 3 to 20 parts of catalyst, and 0.01 to 1 part of cross-linking reaction active agent; and a silane cross-linked compounding ingredient comprises the following components: 100 parts of silane and 10 to 50 parts of initiator which are uniformly mixed. The silane quickly cross-linked polyethylene cable material has the advantages that: the defects of the warm water cross-linked cable material technology are overcome; the cable material can be quickly cross-linked under the natural conditions; and the cross-linked curing reaction of the cable can avoid soaking in warm water or can be finished in short soaking time while meeting all performance requirements; and a large quantity of energy sources are saved.

Description

technical field [0001] The invention belongs to the technical field of wire and cable materials, and relates to a silane rapid cross-linked polyethylene cable material. Background technique [0002] Cross-linked polyethylene has gradually replaced polyvinyl chloride (PVC) due to its excellent performance, and has become the main material for cable insulation. Among cross-linked polyethylene, silane cross-linking, which has simple cable manufacturing process, less restrictions on production cross-section and length, less cable waste, low investment in production equipment, and convenient operation, has become the first choice. Silane crosslinking can improve the strength and heat resistance of polyethylene, and the service temperature is increased from 70°C to 90°C, so it is widely used in cable insulation materials of 10KV and below. At present, the cross-linking and curing reaction of silane cross-linking cable materials can only be completed by boiling the cable in warm w...

AI Technical Summary

Problems solved by technology

At present, the cross-linking and curing reaction of silane cross-linking cable materials can only be completed by placing the cable in warm water at 90°C or in a steam sauna for 6 to 10 hours. Therefore, the cross-linking and curing time is long and consumes energy. Serious effects and can easily lead to water ingress of conductors during immersion, reducing cable performance and service life