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

A semi-conductive, low-temperature resistant technology, applied in rubber insulators, organic insulators, etc., can solve problems such as embrittlement cracks, uneven electric field, breakdown, etc., and achieve the effect of good retraction performance and good bending performance.

Active Publication Date: 2019-04-12
SHANGHAI LANHAO ELECTRIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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

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Effect test

specific Embodiment 1

[0019] A semi-conductive material for ultra-low temperature resistant cables disclosed by the present invention consists of 50 parts of nitrile rubber, 30 parts of neoprene rubber, 20 parts of ethylene vinyl acetate rubber, 1 part of anti-aging agent 4010NA, 3 parts of vaseline, and 1 part of TMTD , 1 part of DM, 0.2 parts of sulfur, 1.5 parts of dicumyl peroxide, 6 parts of zinc oxide, 4 parts of magnesium oxide, 55 parts of carbon black N330, 40 parts of conductive carbon black, and 12 parts of plasticizer. The method of two-stage vulcanization is adopted to ensure that the rubber has a long enough scorch time during continuous vulcanization. In the continuous sulfur extrusion process, the extruder temperature was set at 50-75°C, the vulcanization steam pressure was 1.3 MPa, and the traction speed was 14m / min to obtain the finished product. The volume resistivity of the finished wire core is 30Ω·cm, which can be easily peeled off from the insulation, and the elongation rate ...

specific Embodiment 2

[0020] A semi-conductive material for ultra-low temperature resistant cables disclosed by the present invention is selected from 55 parts of nitrile rubber, 25 parts of neoprene rubber, 30 parts of ethylene vinyl acetate rubber, 1.5 parts of anti-aging agent 4010NA, 4 parts of vaseline, and 1.5 parts of TMTD 1.5 parts of DM, 0.4 parts of sulfur, 2 parts of dicumyl peroxide, 4.5 parts of zinc oxide, 3 parts of magnesium oxide, 48 parts of carbon black N330, 30 parts of conductive carbon black, and 10 parts of plasticizer. The method of two-stage vulcanization is adopted to ensure that the rubber has a long enough scorch time during continuous vulcanization. In the continuous sulfur extrusion process, the extruder temperature was set at 50-75°C, the vulcanization steam pressure was 1.4 MPa, and the traction speed was 15m / min to obtain the finished product. The volume resistivity of the finished wire core is 55Ω·cm, which can be easily peeled off from the insulation, and the elon...

specific Embodiment 3

[0021] A semi-conductive material for ultra-low temperature resistant cables disclosed by the present invention consists of 60 parts of nitrile rubber, 20 parts of neoprene rubber, 10 parts of ethylene vinyl acetate rubber, 2 parts of anti-aging agent 4010NA, 5 parts of vaseline, and 2 parts of TMTD , 2 parts of DM, 0.5 parts of sulfur, 1 part of dicumyl peroxide, 3 parts of zinc oxide, 2 parts of magnesium oxide, 40 parts of carbon black N330, 20 parts of conductive carbon black, and 8 parts of plasticizer. The method of two-stage vulcanization is adopted to ensure that the rubber has a long enough scorch time during continuous vulcanization. In the continuous sulfur extrusion process, the extruder temperature was set at 50-75°C, the vulcanization steam pressure was 1.5 MPa, and the traction speed was 16m / min to obtain the finished product. The volume resistivity of the finished wire core is 79Ω·cm, which can be easily peeled off from the insulation, and the elongation rate i...

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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 ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L9/02C08L11/00C08L23/08C08L91/06C08K13/02C08K3/06C08K3/04C08K3/22C08K5/11C08K5/18H01B3/28
CPCC08K2003/222C08K2003/2296C08K2201/001C08K2201/014C08L9/02C08L2203/202C08L2205/035H01B3/28C08L11/00C08L23/0853C08L91/06C08K13/02C08K3/06C08K3/04C08K3/22C08K5/11C08K5/18
Inventor 钱章兴王兵兵田敏丁国生
Owner SHANGHAI LANHAO ELECTRIC
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