Insulating material high in gas proofing and mildew proofing properties

Abstract

The invention discloses an insulating material high in gas proofing and mildew proofing properties. The insulating material is prepared from, by weight, 40-45 parts of low-density polyethylene, 11-13 parts of ammonium polyphosphate, 0.3-0.5 part of OP10 (octyl phenol-10), 12-15 parts of ethyl orthosilicate, 10-14 parts of soybean protein fibers, 10-15 parts of maleic anhydride, 2-2.5 parts of acrylic acid, 1.5-2 parts of ammonium persulfate, 7-9 parts of carboxylated titanium dioxide colloidal sol, 2.6-3 parts of calcium chloride, 1.1-1.4 parts of povidone, 3-4 parts of acetylene black, proper amount of absolute ethyl alcohol and proper amount of deionized water. The insulating material has the advantages of high mechanical strength, low smoke, non-toxic, high wear resistance, excellent high temperature resisting property and the like and is high in tensile strength, excellent in mechanical property, easy in raw material obtaining and worthy of popularization.

Description

technical field [0001] The invention relates to the technical field of cable materials, in particular to an insulating material with excellent gas-barrier and mildew-proof properties. Background technique [0002] Due to the low viscosity during processing and high melt strength during stretching, low-density polyethylene also has strong chemical resistance, acid and alkali resistance, oil resistance, light weight, non-toxic, long service life and other conventional materials Therefore, its scope of application has covered the development of the national economy and all aspects of people's lives, such as wires and cables, pipelines, automotive interiors and building materials. However, polyethylene has a low oxygen index value and is flammable. Under natural conditions, it can burn quickly and release a lot of heat. What's worse is that it is accompanied by molten droplet behavior, which may cause secondary fires, and it will also volatilize when heated and decomposed. A la...

AI Technical Summary

Problems solved by technology

Although the present invention solves the problems of low-density polyethylene with poor flame retardancy and poor water resistance, and improves the safety factor of polyethylene during use, the low-density polyethylene is used in the high-voltage field. During the operation of the DC cable, the polyethylene The low conductivity characteristics make it difficult for the space charge accumulated inside to diffuse, causing serious distortion of the local field strength, especially when there is a temperature gradient effect during full-load operation, this phenomenon is more serious. When the local field strength on the surface of the insulating layer reaches a certain value When it is used, it will cause partial discharge, resinization and other insulation aging phenomena, which will greatly reduce the service life of the cable. Therefore, it is particularly urgent to improve the insulation performance of polyethylene while improving its flame retardant and waterproof properties.