Room-temp, silane cross linked polyethylene plastic and its preparation method

Abstract

The invention relates to a room temperature silane cross-linked polyethylene plastic used for wire and cable insulation layers and low-medium-high-density pipes. Its composition includes: 100 parts by weight of polyethylene resin, 0.8-2.5 parts by weight of silane cross-linking agent, 0.05-1.0 parts by weight of metal deactivator, 0.05-6 parts by weight of cross-linking catalyst, 1.0-20 parts by weight of auxiliary agent carrier, anti- 0.02-3 parts by weight of oxygen agent. Its production process is a two-step method, including the preparation of silane grafting material A and the preparation of catalyst master batch B. When using, A and B are fully mixed, and then made into cable or pipe products through an extruder, and placed at room temperature 1 to 3 days to complete the cross-linking process. The invention overcomes the defect that silane cross-linked plastics can only be cross-linked under warm water or steam environment in the past, and improves the mechanical strength and temperature resistance of polyethylene plastics.

Description

technical field [0001] The invention relates to an insulating layer and a low-medium-high-density pipe material used for electric wires and cables. Specifically, it relates to a silane cross-linked polyethylene plastic that does not need to be restricted by humidity and temperature conditions. Background technique [0002] Cross-linked polyethylene plastic has the advantages of good heat resistance, strong load capacity, non-melting, corrosion resistance, high mechanical properties, excellent electrical properties, and no carcinogenic lead stabilizers. It is used to replace traditional PVC plastic in more and more wire, cable and pipe manufacturing. The application of cross-linking technology has greatly improved the maximum service temperature and environmental stress cracking resistance of cables and pipes. However, silane cross-linked polyethylene plastic can only be cross-linked when soaked in warm water or placed in a steam environment, so it requires a larger pool an...

AI Technical Summary

Problems solved by technology

However, silane cross-linked polyethylene plastics can only be cross-linked when soaked in warm water or placed in a steam environment. Therefore, a larger pool and more energy consumption are required, and the production process is relatively complicated.