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Formula and production process of dual-layer thermal shrinkage-chilling shrinkage composite sleeve

A composite sleeve and heat-shrinkable technology, which is applied in the field of power materials, can solve the problems of low reliability of cable connection, weather resistance, acid and alkali resistance, water vapor resistance, corona resistance, and low electrical insulation performance, achieving good elasticity, Excellent weather resistance and simplified installation process

Active Publication Date: 2012-07-11
HONGSHANG HEAT SHRINKABLE MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the composite sleeve provided by the prior art, there is a gap in the interface between the two layers, resulting in low reliability of the cable connection, and the inner sleeve has good elasticity, weather resistance, ozone resistance, heat resistance, acid and alkali resistance, and water vapor resistance. , Corona resistance and electrical insulation properties are not high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] According to the ratio of parts by weight, the outer casing includes the following components:

[0063] 40 parts of ethylene vinyl acetate copolymer (EVA), 50 parts of linear low-density polyethylene (LLDPE), 10 parts of maleic anhydride graft polymer, 12 parts of surface-treated activated carbon black, and 10 parts of ultra-fine surface-treated activated magnesium hydroxide 5 parts, ultra-fine surface treatment active talcum powder 5 parts, lubricant 0.5 part, antioxidant 0.5 part, sensitizing crosslinking agent 1 part.

[0064] According to the ratio of parts by weight, the inner casing includes the following components:

[0065] 100 parts of EPDM, 5 parts of superfine surface treated activated clay, 10 parts of superfine surface treated activated talcum powder, 0.5 parts of lubricant, and 3 parts of color masterbatch.

Embodiment 2

[0067] According to the ratio of parts by weight, the outer casing includes the following components:

[0068] Ethylene vinyl acetate copolymer (EVA) 35 parts, linear low density polyethylene (LLDPE) 50 parts, maleic anhydride graft polymer 15 parts, surface treatment activated carbon black 30 parts, superfine surface treatment active magnesium hydroxide 20 parts 10 parts of superfine surface treatment active talcum powder, 0.5 parts of lubricant, 1 part of antioxidant, and 1.5 parts of sensitizing crosslinking agent.

[0069] According to the ratio of parts by weight, the inner casing includes the following components:

[0070] 100 parts of EPDM, 8 parts of superfine surface treated activated clay, 15 parts of superfine surface treated activated talcum powder, 0.8 parts of lubricant, and 5 parts of color masterbatch.

Embodiment 3

[0072] According to the ratio of parts by weight, the outer casing includes the following components:

[0073] 25 parts of ethylene vinyl acetate copolymer (EVA), 45 parts of linear low-density polyethylene (LLDPE), 15 parts of maleic anhydride graft polymer, 25.5 parts of surface-treated activated carbon black, and 17 parts of ultra-fine surface-treated activated magnesium hydroxide 8.5 parts of superfine surface treatment active talcum powder, 0.85 parts of lubricant, 0.85 part of antioxidant, and 1.7 parts of sensitizing crosslinking agent.

[0074] According to the ratio of parts by weight, the inner casing includes the following components:

[0075] 100 parts of EPDM, 10 parts of superfine surface treated activated clay, 20 parts of superfine surface treated activated talcum powder, 1 part of lubricant, 6 parts of color masterbatch.

[0076] The present invention is also a production process of a double-layer heat-shrinkable-cold-shrinkable composite sleeve, which compri...

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Abstract

The invention provides a formula and a production process of a dual-layer thermal shrinkage-chilling shrinkage composite sleeve which comprises an inner sleeve and an outer sleeve, wherein the inner sleeve comprises an ethylene vinyl acetate copolymer, low-density polyethylene, a maleic anhydride grafted polymer, a surface treatment ultrathin active magnesium hydroxide, surface treatment ultrathin active aluminium hydroxide, a lubricating agent, an antioxygen, a light stabilizer and a sensitive cross-linking agent; and the outer sleeve comprises ethylene propylene diene monomer, ultrathin surface treatment active kaoline, ultrathin surface treatment active talcum powder, a lubricating agent and colorant. The dual-layer thermal shrinkage-chilling shrinkage composite sleeve obtained by the production process has no gap between the inner sleeve and the outer sleeve and high connection reliability; and the inner sleeve has good elasticity, weather resistance, ozone resistance, heat resistance, acid and alkaline resistance, water vapor resistance, corona resistance and high electric insulation property.

Description

technical field [0001] The invention relates to the technical field of electric power materials, in particular to a formula and a production process of a double-layer heat-shrinkable-cold-shrinkable composite sleeve. Background technique [0002] As the proportion of cable applications in the power distribution network of large and medium-sized cities is getting higher and higher, the strong demand for cable accessories has been driven, and the speed of product development and improvement has also been accelerated. In order to improve the increasingly higher electrical performance requirements of cable accessories and meet market needs, a double-layer heat-shrinkable-cold-shrinkable composite sleeve has been developed. However, in the composite sleeve provided by the prior art, there is a gap in the interface between the two layers, resulting in low reliability of the cable connection, and the inner sleeve has good elasticity, weather resistance, ozone resistance, heat resis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/08C08L23/16C08K13/06C08K3/04C08K3/22C08K3/34B29C47/92B29C71/04B29C48/92
CPCB29C48/92B29C2948/92561B29C2948/92704B29C2948/92895
Inventor 钟晓光吴绍佳肖国常林熙波
Owner HONGSHANG HEAT SHRINKABLE MATERIALS
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