Semi-conducting silicon rubber shielding material for cables

A shielding material, silicone rubber technology, applied in the field of semi-conductive silicone rubber shielding materials for cables, to achieve good electrical and mechanical properties, good radiation resistance, and excellent plasticity

Inactive Publication Date: 2015-11-25
WUXI JIABANG ELECTRIC POWER PIPE FACTORY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, although the heat resistance and conductivity of cable semi-conductive shielding materials have improved, the radiation resist...

Method used

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  • Semi-conducting silicon rubber shielding material for cables
  • Semi-conducting silicon rubber shielding material for cables
  • Semi-conducting silicon rubber shielding material for cables

Examples

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Effect test

Embodiment 1

[0034] The semi-conductive silicone rubber shielding material for cables of the present embodiment is prepared from the following raw materials:

[0035]

[0036] The preparation method of the semi-conductive silicone rubber shielding material for the above-mentioned cables is as follows:

[0037] (1) Put the conductive carbon black into a 95°C oven and heat for 3h;

[0038] (2) Add silicone rubber, stearic acid, zinc oxide, ferric oxide, conductive carbon black, white carbon black, diphenyl Silicone glycol, triallyl cyanurate and dicumyl peroxide are mixed, the mixing temperature is 38°C, after the dicumyl peroxide is added, the glue can be removed after 4-5 times of thin pass piece;

[0039] (3) The mixed film is parked for 24 hours, and then re-milled at room temperature. The back-milled machine is used. After the rubber material becomes soft and the surface is smooth and flat, the film can be glued and released. The thickness of the obtained film is about 2 mm;

[004...

Embodiment 2

[0042] The semi-conductive silicone rubber shielding material for cables of the present embodiment is prepared from the following raw materials:

[0043]

[0044] The preparation method of the semi-conductive silicone rubber shielding material for the above-mentioned cables is as follows:

[0045] (1) Conductive carbon black is put into the oven of 100 ℃ and heated for 1h;

[0046] (2) Add silicone rubber, stearic acid, zinc oxide, ferric oxide, conductive carbon black, white carbon black, diphenyl Silicone glycol, triallyl cyanurate and dicumyl peroxide are mixed, the mixing temperature is 30°C, after the dicumyl peroxide is added, the glue can be removed after 4-5 times of thinning piece;

[0047] (3) The mixed film is parked for 30 hours, and then re-milled at room temperature. The back-milled machine is used. After the rubber material becomes soft and the surface is smooth and flat, the film can be glued and released. The thickness of the obtained film is about 1.5mm...

Embodiment 3

[0050] The semi-conductive silicone rubber shielding material for cables of the present embodiment is prepared from the following raw materials:

[0051]

[0052] The preparation method of the semi-conductive silicone rubber shielding material for the above-mentioned cables is as follows:

[0053] (1) Put conductive carbon black into an oven at 100°C and heat for 1.5h;

[0054] (2) Add silicone rubber, stearic acid, zinc oxide, ferric oxide, conductive carbon black, white carbon black, diphenyl Silicone glycol, triallyl cyanurate and dicumyl peroxide are mixed, the mixing temperature is 35°C, after the dicumyl peroxide is added, the glue can be removed after 4-5 times of thin pass piece;

[0055] (3) The mixed film is parked for 36 hours, and then re-milled at room temperature. The back-milled machine is used. After the rubber material becomes soft and the surface is smooth and flat, the film can be glued and released. The thickness of the obtained film is about 2 mm;

...

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Abstract

The invention provides a semi-conducting silicon rubber shielding material for cables and a preparation method thereof. The semi-conducting silicon rubber shielding material for cables is mainly prepared from the following materials: 80 to 95 parts by weight of silicon rubber, 5 to 18 parts by weight of conductive carbon black, 25 to 38 parts by weight of white carbon black, 3 to 5 parts by weight of dicumyl peroxide, 4 to 6 parts by weight of assistant vulcanizing agent, 16 to 20 parts by weight of diphenyl silanediol, 3 to 5 parts by weight of stearic acid, 1 to 3 parts by weight of zinc oxide and 1 to 1.8 parts by weight of ferric oxide. The radiation resistance of the semi-conducting silicon rubber shielding material disclosed by the invention is good, and the semi-conducting silicon rubber shielding material has good electrical and mechanical properties; when the semi-conducting silicon rubber shielding material is used as a wire and cable shielding layer, in a radiation place, the strength retention rate of the wire and cable shielding layer can be more than 80 percent and the elongation retention rate is about 45 percent for a long time, and the wire and cable shielding layer has excellent plasticity.

Description

technical field [0001] The invention belongs to the field of cable materials and relates to a semiconductive silicon rubber shielding material for cables. Background technique [0002] In the wire and cable industry, semi-conductive polymer materials are mainly used for conductor shielding and insulation shielding, that is, conductive fillers are added to the polymer matrix material, such as acetylene carbon black, conductive graphite powder, conductive carbon fiber, etc. These two shields are usually based on EVA in power cables. EVA is a thermoplastic elastomer, and its softness is not as good as that of rubber. It is often used in fixed-laying cables. For mobile cables, EVA is stretched due to the limitation of its VA content. The reason is: the higher the VA content, the better the elasticity and softness of EVA, but its price is more expensive and its processing performance is poor (because it is sensitive to temperature, it is easy to stick to the roll). Therefore, t...

Claims

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Application Information

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IPC IPC(8): C08L83/04C08L83/06C08K13/02C08K3/04C08K3/36C08K5/14C08K5/5419C08K5/09C08K3/22C08K5/3492H01B7/17
Inventor 徐德生
Owner WUXI JIABANG ELECTRIC POWER PIPE FACTORY
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