Modified natural rubber composite material for cable insulation layer

Abstract

The invention discloses a modified natural rubber composite material for a cable insulation layer. The material is prepared from the following raw materials in parts by weight: 30 to 40 parts of natural rubber, 40 to 60 parts of methyl methacrylate natural rubber, 50 to 60 parts of ethylene propylene diene monomer, 50 to 55 parts of nanosilicon dioxide, 16 to 20 parts of diatomite, 7 to 12 parts of nylon PA-66, 12 to 16 parts of calcined clay, 33 to 37 parts of white carbon black, 15 to 25 parts of carbon black, 30 to 45 parts of attapulgite, 2 to 3 parts of zinc oxide, 1.8 to 2.5 parts of sulphur, 2 to 4 parts of N-cyclohexyl-2-benzothiazole sulfenamide, 1 to 2 parts of bis(3-triethoxysilicyl propyl)-tetrasulfide, 2.5 to 3 parts of magnesium stearate, 5 to 10 parts of maleic anhydride and 2 to 5 parts of liquid carboxylated nitrile rubber. According to the modified natural rubber composite material for the cable insulation layer, provided by the invention, the cable insulation layer adopts the modified natural rubber composite material, the oxidation and heat resistant properties are good, the ageing-resistant performance is excellent, the mechanical property is good and the service life is long.

Description

technical field [0001] The invention relates to the technical field of composite cable sheaths, in particular to a modified natural rubber composite material for cable insulation layers. Background technique [0002] Natural rubber is a linear natural polymer compound. The chemical composition is mainly cis-1,4-polyisoprene, which contains a large number of unsaturated double bonds. It is easy to perform autocatalytic reactions with oxygen in the air. Excessive cross-linking will lead to viscous and cracked rubber, which greatly limits the application in cable sheath materials. How to prepare a cable sheath with good thermal oxygen resistance, good mechanical properties, excellent aging resistance and long service life? Cover material becomes the technical problem that needs to solve at present. Contents of the invention [0003] The invention provides a modified natural rubber composite material for the cable insulation layer, which has good thermal oxygen resistance, ex...

AI Technical Summary

Problems solved by technology

[0002] Natural rubber is a linear natural polymer compound. The chemical composition is mainly cis-1,4-polyisoprene, which contains a large number of unsaturated double bonds. It is easy to perform autocatalytic reactions with oxygen in the air. Excessive cross-linking will lead to viscous and cracked rubber, which greatly limits the application in cable sheath materials. How to prepare a cable sheath with good thermal oxygen resistance, good mechanical properties, excellent aging resistance and long service life? Set of materials has become a technical problem that needs to be solved at present