Super-smooth semiconductive shield cable special material and shield cable made of super-smooth semiconductive shield cable special material

Abstract

The invention discloses a super-smooth semiconductive shield cable special material which comprises the following components in parts by weight: 30 to 50 parts of an isocyanic esterified vinyl chloride-vinyl acetate copolymer, 30 to 36 parts of a maleic anhydride grafted ethylene-1-octylene copolymer elastomer, 15 to 18 parts of linear low density polyethylene, 5 to 6 parts of ricinoleic functionalized graphene, 3 to 4 parts of modified nano-conductive carbon black, 1 to 1.5 parts of multi-walled carbon nanotubes, 2 to 3 parts of a cross-linking agent and 12 to 13 parts of a processing aid. The invention also discloses a shield cable made of the super-smooth semiconductive shield cable special material. The advantages of shield layer flatness and smoothness, high volume resistivity stability, good conductive filler dispersion uniformity, high pressure and high temperature resistance, excellent mechanical property, long service life and the like are achieved.

Description

technical field [0001] The invention relates to the technical field of cables, in particular to a special material for ultra-smooth semi-conductive shielded cables and the shielded cable. Background technique [0002] The semi-conductive shielding layer is an important part of the high-voltage cable structure, which can make the electric field distribution inside the cable more uniform, reduce the damage caused by stress concentration to the cable insulation layer, and prolong the service life of the cable. However, especially in high-voltage cables, the existing semi-conductive shielding materials are not enough in terms of resistance stability, smoothness, and purity, and there are also large fluctuations in volume resistivity, uneven surface of the shielding layer, and burrs or protrusions. The interface of the semi-conductive shielding material is prone to cable damage due to partial discharge, field strength and water. At present, it is usually necessary to add conduct...

AI Technical Summary

Problems solved by technology

However, especially in high-voltage cables, the existing semi-conductive shielding materials are not enough in terms of resistance stability, smoothness, and purity, and there are also large fluctuations in volume resistivity, uneven surface of the shielding layer, and burrs or protrusions. The interface of the semi-conductive shielding material is prone to cable damage due to partial discharge, field strength and water.

At present, it is usually necessary to add conductive fillers to the base resin, but the conductive fillers have problems such as large particle size and uneven distribution, which leads to local concentration of the electric field inside the cable and damages the cable

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