A kind of semiconductive material for ultra-low temperature resistant cable

Abstract

The invention discloses a semi-conductive material for a super low-temperature resistant cable. Raw materials related to active ingredients for preparing the semi-conductive material and weight ratios are as follows: 50 to 60 parts of butadiene-acrylonitrile rubber, 20 to 30 parts of chloroprene rubber, 10 to 30 parts of ethylene-vinylacetate rubber, 1 to 2 parts of anti-aging agent 4010NA, 3 to 5 parts of vaseline, 1 to 2 parts of TMTD (tetramethyl thiuram disulfide), 1 to 2 parts of DM, 0.2 to 0.5 part of sulphur, 1 to 2 parts of dicumyl peroxide, 3 to 6 parts of zinc oxide, 2 to 4 parts of magnesium oxide, 40 to 55 parts of carbon black N330, 20 to 40 parts of conductive carbon black and 8 to 12 parts of plasticizer.

Description

technical field [0001] The invention belongs to the technical field of cable insulation and shielding materials, and in particular relates to a super low-temperature-resistant semiconductive material suitable for use in insulation and shielding materials in an extremely cold environment of -50°C. Background technique [0002] For some countries with large mineral resources in the cold zone, such as Russia, there are generally special requirements for the low-temperature resistance of cables, especially for low-temperature mining industries, where cables need to be fixed at -40°C or even lower for power transmission. What is more demanding is that the control cable needs to reciprocate to cooperate with the movement of the equipment during the equipment mining process, which has higher requirements for the temperature resistance of the rubber material used for the cable. [0003] At present, the domestic and international general standards for the low-temperature performance ...

AI Technical Summary

Problems solved by technology

But in fact, user feedback is that although the elongation at break of the existing insulating shielding materials meets the requirements of the national standard, in the process of use, it is often too hard, which leads to inconvenient laying or serious embrittlement cracks after repeated inspections. For medium and high voltage cables, there will be a fatal defect for the cable, that is, an uneven electric field will be formed at the shield crack, and at the same time, the local amplification at the shield crack will increase greatly, and it is very likely that a breakdown will occur at this outlet, causing the cable to be scrapped

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