Medium and low voltage fuel-resistant rubber semi-conductive shielding material for cable and preparation thereof

Abstract

The invention relates to a shielding material, in particular to a middle and low-voltage oil-resistant rubber semiconductive shielding material for a cable and a method for preparing the same. The shielding material comprises the following compositions by weight portion: 100 portions of chlorinated polyethylene, 50 to 100 portions of graphitized carbon black, 15 to 35 portions of graphite powder,8 to 20 portions of plasticizer, 0.5 to 3 portions of anti-aging agent, 1 to 4 portions of thiadiazole curing agent, 1.5 to 3 portions of amine accelerating agent, 8 to 10 portions of zinc oxide and stearic acid. The preparation method comprises the steps of weighing, plasticization, mixing and discharging or granulation. The middle and low-voltage oil-resistant rubber semiconductive shielding material has good oil resistance and high electrical conductivity, does not generate peculiar smell, is easy to peel, and does not generate mutual color transfer with insulation.

Description

Medium and low voltage oil-resistant rubber semi-conductive shielding material for cables and preparation method thereof technical field The invention relates to a shielding material, in particular to a medium and low voltage oil-resistant rubber semi-conductive shielding material for cables, and a preparation method for the shielding material. Background technique Medium and low voltage rubber-sheathed cables, including mining cables, marine cables, power cables, etc., all need rubber semi-conductive shielding materials for conductors and insulation. The basic rubber in the prior art mainly uses EPDM rubber or other non-polar rubber. As described in Chinese patent 200410089024.5, shielding material for medium-voltage rubber insulated cables, its composition (parts by weight): 100 parts of EPDM rubber, 50-100 parts of conductive carbon black, 1-3 parts of anti-aging agent, organic peroxide 2 to 4 parts of compound, 1 to 2 parts of coupling agent, 2 to 8 parts of wax, and 5...

AI Technical Summary

Problems solved by technology

Chlorinated polyethylene rubber has a high Mooney viscosity, so it is not necessary to add conductive materials when used for insulation or sheathing. It is only filled with talcum powder, calcium carbonate or clay with low Mooney viscosity, so it is easy to mix and has good workmanship; A large amount of conductive materials need to be added when used as a shielding material, and the Mooney viscosity of the conductive material is relatively high, which makes it difficult to fully mix the two, and the manufacturability is extremely poor, so there is no report of using chlorinated polyethylene as a semi-conductive material until the present invention. Conductive Shielding Base