Silane cross-linked peelable semi-conductive external shielding material and preparation method thereof

A silane cross-linking and semi-conductive technology, which is applied in the field of silane cross-linking peelable semi-conductive outer shielding material and its preparation, can solve problems such as difficulty in forming effective cross-linking products, less cross-linking parts, and difficulty in ensuring products, and achieves Maintain smoothness, high degree of cross-linking, and increase the effect of ratio

Inactive Publication Date: 2019-02-12
FAR EAST CABLE +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the mixing ratio of materials A and B, material B accounts for a relatively large proportion, and at the same time, the carbon black content in material A is relatively high, resulting in less cross-li

Method used

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  • Silane cross-linked peelable semi-conductive external shielding material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0025] This embodiment provides a silane-crosslinked peelable semiconductive outer shielding material that can be effectively crosslinked, and its raw materials include:

[0026] Material A, 100 parts of ethylene-vinyl acetate copolymer, 1.5 parts of vinyltriethoxysilane, 0.3 part of dicumyl peroxide, 0.8 part of antioxidant 300, 8 parts of white oil.

[0027] Material B, 100 parts of ethylene-vinyl acetate copolymer, 105 parts of conductive filler (graphene), 10 parts of white oil, 6 parts of methyl silicone oil, 2 parts of TAS-2A, 0.6 parts of zinc stearate, 1 part of dilauric acid Dibutyltin, 0.8 parts Antioxidant 300.

[0028] The preparation method of the effectively cross-linkable silane cross-linking type peelable semi-conductive outer shielding material is as follows:

[0029] (1) The above-mentioned A material is passed through an automatic metering device, and the material is automatically fed into the twin-screw for mixing, grafting, extruding, granulating, and dry...

Embodiment 2

[0034] Material A, 100 parts of ethylene-vinyl acetate copolymer, 2.5 parts of vinyltriethoxysilane, 0.6 part of dicumyl peroxide, 0.6 part of antioxidant 300, 6 parts of white oil.

[0035] Material B, 100 parts of ethylene-vinyl acetate copolymer, 125 parts of conductive filler (carbon nanotube and carbon black mixture), 15 parts of white oil, 8 parts of methyl silicone oil, 3 parts of TAS-2A, 0.8 part of zinc stearate, 1.5 parts of dibutyltin dilaurate, 1.3 parts of antioxidant 300.

[0036] The preparation method of the effectively cross-linkable silane cross-linking type peelable semi-conductive outer shielding material is as follows:

[0037] (1) The above-mentioned A material is passed through an automatic metering device, and the material is automatically fed into the twin-screw for mixing, grafting, extruding, granulating, and drying to obtain the graft A material; the temperature of each section of the extruder is sequentially: the first zone 125°C, 160°C in zone 2,...

Embodiment 3

[0042] This embodiment provides a silane-crosslinked peelable semiconductive outer shielding material that can be effectively crosslinked, and its raw materials include:

[0043] Material A, 100 parts of ethylene-vinyl acetate copolymer, 3.5 parts of vinyltriethoxysilane, 0.8 part of dicumyl peroxide, 0.3 part of antioxidant 300, 5 parts of white oil.

[0044] Material B, 100 parts of ethylene-vinyl acetate copolymer, 145 parts of conductive filler (conductive carbon black), 18 parts of white oil, 10 parts of methyl silicone oil, 4 parts of TAS-2A, 0.8 parts of zinc stearate, 2.5 parts of dilaurel Dibutyltin acid, 1.8 parts of antioxidant 300.

[0045] The preparation method of the effectively cross-linkable silane cross-linking type peelable semi-conductive outer shielding material is as follows:

[0046] (1) The above-mentioned A material is passed through an automatic metering device, and the material is automatically fed into the twin-screw for mixing, grafting, extruding...

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Abstract

The invention discloses a silane cross-linked peelable semi-conductive external shielding material and a preparation method thereof. The silane cross-linked peelable semi-conductive external shieldingmaterial is prepared by mixing a grafted material A and a catalytic material B with a mass ratio of (5 to 9) to 1 and then cross-linking in warm water, wherein the grafted material A comprises the following components in parts by weight: 100 parts of ethylene-vinyl acetate copolymer, 1 to 4 parts of silane, 0.2 to 1 part of an initiator, 0.1 to 1 part of an antioxidant, and 5 to 10 parts of a lubricant; the catalytic material B comprises the following components in parts by weight: 100 parts of ethylene-vinyl acetate copolymer, 100 to 150 parts of conductive filler, 10 to 20 parts of a lubricant, 5 to 10 parts of a stripping agent, 1 to 5 parts of a dispersant, 0.5 to 3 parts of a catalyst, and 0.5 to 2 parts of an antioxidant; the ethylene-vinyl acetate copolymer has a VA content of 25%to 30%, a melt flow rate of 2.3 to 7.5 g/10min (the test conditions are 190 DEG C and 2.16 kg, the same below). The silane cross-linked peelable semi-conductive external shielding material disclosed by the invention has good electrical conductivity, and in particular, can ensure effective cross-linking of the product.

Description

technical field [0001] The invention relates to a semiconductive modified material for electric wires and cables, in particular to a silane crosslinked peelable semiconductive outer shielding material and a preparation method thereof. Background technique [0002] With the development of society and economy, power consumption continues to increase, and there are more and more high-voltage and ultra-high-voltage power supplies. In high-voltage and ultra-high-voltage power supply cables, semi-conductive shielding materials are indispensable materials. Their main functions are to improve the radial distribution of the electric field inside the cable and to homogenize the electric field, so as to improve the electric strength of the cable and directly or indirectly improve the service life of the cable. . In the shielding material standard, there are many types of shielding materials, but the peroxide cross-linked shielding materials still account for the absolute majority at h...

Claims

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Application Information

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IPC IPC(8): C08L51/06C08L23/08C08K3/04
CPCC08K2201/001C08L23/0853C08L51/06C08L2203/20C08L2205/035C08L2312/08C08K3/042C08K3/041C08K3/04
Inventor 邵海彬吴鑫曾泽华田维生张会云杨希
Owner FAR EAST CABLE
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