Conductive semiconductive shielding material suitable for four co-extrusion continuous sulfur units

Abstract

The invention discloses a conductor semiconducting shielding material (an inner shielding material for short) applicable to four co-extrusion continuous vulcanization sets. In order to solve the production problem that an existing inner shielding material cannot be suitable for the four co-extrusion continuous vulcanization sets, the semiconducting inner shielding material comprises following components in parts by weight: 100 parts of ethylene-vinyl acetate, 80-95 parts of conductive carbon black, 40-46 parts of dioctyl phthalate, 4.0-4.5 parts of dicumyl peroxide, 2.0-2.5 parts of triallyl isocyanurate, 8-10 parts of zinc oxide and 0.5-1.0 part of stearic acid. The conductor semiconducting shielding material not only can meet the processing property of co-extrusion of four extruders, but also meets the specification of JB / T10738-2007 Mechanical and Physical Performance and Electric Performance of Semiconducting Shielding Material for Ethylene Propylene Rubber Cables.

Description

technical field [0001] The invention relates to a conductor semi-conductive shielding material (inner shielding material for short) which is suitable for four co-extrusion continuous sulfur units to produce ethylene-propylene insulated cables. Background technique [0002] So far, the continuous sulfur unit introduced by Jinbei Electric Co., Ltd. from DAVIS in the United States in 2012 (it was jointly completed by related companies in three countries including the United States, Switzerland, and Germany) is the only four co-extrusion units in the world. equipment, figure 1 It shows four co-extrusion heads, while other companies have three co-extruders at most. The physical parameters of the inner shielding material produced at home and abroad are only matched with three co-extrusion continuous sulfur units, and three co-extrusion continuous sulfur units are used. The trial production of inner shielding materials all ended in failure. The reason is that since the included a...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the deficiency that the existing inner shielding material cannot be adapted to the production of four extruder co-extrusion sulfuration units, the present invention aims to provide a conductor and semi-conductive shielding material suitable for four co-extrusion sulfuration units. Not only can it meet the process performance of co-extrusion by four extruders, but also meet the requirements of JB / T10738-2007 "Mechanical, physical and electrical properties of semi-conductive shielding materials for ethylene-propylene rubber cables"

Images