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Strippable semiconductive shielding rubber for rubber insulation and preparation method thereof

A semi-conductive and rubber technology, applied in the direction of power cables with shielding/conducting layers, etc., can solve the problems of unsatisfactory, uneven dispersion of carbon black, thermal aging and electrical aging of products, and achieve the effect of avoiding performance deviation.

Active Publication Date: 2013-05-29
SHANGHAI LEVSON ENTERPRISE GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, semi-conductive shielding materials for rubber insulated cable insulation use polar rubber and conductive carbon black. It is easy to agglomerate, which will cause uneven dispersion of carbon black; due to the large amount of carbon black filling, the processing and extrusion process is relatively difficult; there are many residues on the insulating surface when peeling off, which is not clean enough; due to the influence of mixing and extrusion process, the size fluctuates Large lead to instability of electrical parameters; products have problems of thermal aging and electrical aging

Method used

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  • Strippable semiconductive shielding rubber for rubber insulation and preparation method thereof
  • Strippable semiconductive shielding rubber for rubber insulation and preparation method thereof
  • Strippable semiconductive shielding rubber for rubber insulation and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024]

[0025] The nitrile rubber is a polar rubber system with an acrylonitrile content of 33%; the anti-aging agent is quinoline anti-aging agent RD; the vulcanizing agent is dicumyl peroxide.

[0026] Implementation process:

[0027] Masticating: After weighing the relevant materials according to the proportion, masticate the nitrile rubber. The masticating temperature is controlled at 80°C. After the mastication is completed, place it for 12 hours before carrying out the subsequent mixing operation.

[0028] Mixing: During the mixing operation, first add graphene to the nitrile rubber, after mixing evenly, add 1 / 2 conductive carbon black, add the remaining carbon black, paraffin and dioctyl ester after about 3 minutes, and then mix After 2 minutes, add other processing aids, and finally add vulcanizing agent and mix for 1 minute before unloading. The temperature during the whole mixing process should not exceed 120°C.

[0029] Film output: After unloading, the semi-c...

Embodiment 2

[0031]

[0032]

[0033] The acrylonitrile content of the nitrile rubber is 26%; the anti-aging agent is diphenylamine anti-aging agent HS911; the vulcanizing agent is bis-tert-butylperoxycumene.

[0034] Implementation process:

[0035] The difference between the implementation steps of this example and the implementation mode and Example 1 is that the graphene is first added to the nitrile rubber during the mixing process, and 1 / 2 of the acetylene carbon black is added after the mixing is uniform, and the remaining acetylene carbon black is added after about 3 minutes. Acetylene carbon black, Vaseline and polyethylene wax, and then knead for 2 minutes before adding other processing aids, and finally add vulcanizing agent and knead for 1 minute before unloading. The temperature of the whole mixing process does not exceed 120 °C.

Embodiment 3

[0037]

[0038] The acrylonitrile content of the nitrile rubber is 28%; the anti-aging agent is quinoline anti-aging agent RD; the vulcanizing agent is dicumyl peroxide.

[0039] Implementation process:

[0040] The difference between the implementation steps of this example and the implementation mode and Example 1 is that the graphene is first added to the nitrile rubber during the mixing process, and 1 / 2 of the conductive carbon black is added after the mixing is uniform, and the remaining carbon black is added after about 3 minutes. Conductive carbon black and dioctyl ester, then add other processing aids after mixing for 2 minutes, and finally add vulcanizing agent and mix for 1 minute before unloading. The temperature of the whole mixing process does not exceed 120 °C.

[0041] Take a certain amount of mixed rubber in the example, vulcanize it on a flat vulcanizing machine at 160°C for 30 minutes, press it into a test piece with a thickness of 2mm, and press it into a...

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Abstract

The invention relates to a strippable semiconductive shielding rubber for rubber insulation and a preparation method thereof. The strippable semiconductive shielding rubber comprises the following components in parts by weight: 100 parts of nitrile-butadiene rubber, 0.5-8 parts of graphene, 10-40 parts of conductive carbon black, 7-15 parts of plasticizer, 1-2 parts of anti-aging agent and 2.5-4.5 parts of vulcanizing agent, wherein the nitrile-butadiene rubber is a solar one; the minimum surface-diameter ratio of the graphene is 1000; the plasticizer is one or a mixture of paraffin, dioctyl ester, stearic acid and the like; and the vulcanizing agent is a peroxide vulcanizing system. The preparation method comprises the following steps: plasticating the nitrile-butadiene rubber twice (10 minutes for each time), and standing at normal temperature for 12 hours; adding the graphene into the plasticated nitrile-butadiene rubber, evenly mixing, and adding 1 / 2 of the conductive carbon black or acetylene carbon black; 3 minutes later, adding the residual carbon black and the plasticizer, and compounding for 2 minutes; sequentially adding various assistants, finally adding the vulcanizing agent, compounding for 1 minute, and then discharging, wherein the compounding temperature is not higher than 120 DEG C; and after discharging, tabletting semiconductive shielding gum on a tabletting machine to prepare the semiconductive shielding rubber. The semiconductive shielding rubber provided by the invention is easy to process and strip and high in conductivity.

Description

technical field [0001] The invention relates to a peelable semi-conductive shielding rubber for rubber insulation and a preparation method thereof, which is used in the technical field of medium and high voltage rubber cable preparation. Background technique [0002] With the rapid development of my country's cable industry and the improvement of specific application safety, especially in special occasions such as mining and mobile substations, in order to effectively prevent the concentration of the electric field inside the cable, make the electric field evenly distributed, and avoid electrical treeing of the insulating layer. Insulation layer breakdown, etc., rubber cables in 6-35kV medium and high voltage power transmission and distribution systems must use semi-conductive shielding materials. [0003] The 2010 Nobel Prize in Physics winners, physicists Andre Geim and Konstantin Novoselov of the University of Manchester, UK, successfully separated graphene from graphite i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L9/02C08K13/02C08K3/04C08K5/14C08K5/01C08K5/10C08K5/09H01B9/02
Inventor 罗安帮曹德明王庆
Owner SHANGHAI LEVSON ENTERPRISE GRP
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