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Semiconductive low-smoke zero-halogen flame-retardant polyolefin sheath material and preparation method thereof

A polyolefin sheath, semi-conductive technology, applied in the direction of conductive materials, conductors, circuits, etc. dispersed in non-conductive inorganic materials, can solve the problems of influence, high cost of sheath material raw materials, difficult processing, etc., and achieve excellent processing performance, production cost reduction, excellent electrical conductivity and flame retardancy

Active Publication Date: 2014-12-17
JIANGSU DEWEI ADVANCED MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The feature of this patent is to use thermoplastic elastomer and ethylene copolymer to process conductive carbon black into conductive masterbatch, and then mix the conductive masterbatch with polyolefin resin and granulate it. Compared with the method of olefin resin mixing and granulation, the dispersion of conductive carbon black is improved to a certain extent. When adding corresponding ingredients such as flame retardants and anti-ultraviolet agents, it is difficult to disperse these ingredients evenly through this method, which not only affects the performance of the corresponding properties, but may also cause difficulties in processing and other aspects
In addition, a relatively large amount of thermoplastic elastomer such as ethylene octene copolymer POE is used in this patent, and the raw material cost of the sheath material is relatively high

Method used

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  • Semiconductive low-smoke zero-halogen flame-retardant polyolefin sheath material and preparation method thereof
  • Semiconductive low-smoke zero-halogen flame-retardant polyolefin sheath material and preparation method thereof
  • Semiconductive low-smoke zero-halogen flame-retardant polyolefin sheath material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0030] This embodiment provides a special semiconductive polyolefin sheathing material for ultra-high voltage cables, and the raw materials used are as follows:

[0031] Polyolefin resin: EVA (VA content is 25wt% ~ 40wt%, melt flow rate is 4.6g / (10min, 2.16kg)) and LDPE (DJ210 grade) are composed at a mass ratio of 2:1;

[0032] Conductive carbon black: superconductive carbon black JE6900;

[0033] Lubricant: polyethylene wax (polymer wax);

[0034] Wetting agent: 10# white oil;

[0035] Dispersant: oleic acid amide;

[0036] Antioxidant: thiobisphenol antioxidant 300#, thiodiethylene bis[3-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate, tris[2.4-di-tert Butylphenyl] phosphite and 2,2,4-trimethyl-1,2-dihydroquinoline polymer compound system, the weight ratio of the four is 1.5:1.5:2:1;

[0037]Anti-ultraviolet agent: 2-hydroxy-4-n-octyloxybenzophenone;

[0038] Flame retardant: a combination of magnesium hydroxide and aluminum hydroxide, the mass ratio of the two is 2:1; ...

Embodiment 2

[0045] This embodiment provides a special semiconductive polyolefin sheathing material for ultra-high voltage cables, and the raw materials used are as follows:

[0046] Polyolefin resin: EVA (VA content is 25wt% ~ 40wt%, melt flow rate is 4.6g / (10min, 2.16kg));

[0047] Conductive carbon black: a mixture of superconductive carbon black JE6900 and conductive carbon black VXC200, the ratio of the two is 2:1;

[0048] Lubricant: Compounded with polyethylene wax and fluorine-containing rheological agent, the ratio of the two is 1:1;

[0049] Wetting agent: simethicone;

[0050] Dispersant: a compound of oleic acid amide and erucic acid amide, the ratio of the two is 2:1;

[0051] Antioxidant: thiobisphenol antioxidant 300#, thiodiethylene bis[3-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate, tris[2.4-di-tert Butylphenyl] phosphite and 2,2,4-trimethyl-1,2-dihydroquinoline polymer compound system, the weight ratio of the four is 1.5:1.5:2:1;

[0052] Anti-ultraviolet agent: 2-h...

Embodiment 3

[0060] This embodiment provides a special semiconductive polyolefin sheathing material for ultra-high voltage cables, and the raw materials used are as follows:

[0061] Polyolefin resin: EVA (VA content is 25wt% ~ 40wt%, melt flow rate is 4.6g / (10min, 2.16kg)) and LDPE (DJ210 grade, melt flow rate is 2.0g / (10min, 2.16kg) ) is composed at a mass ratio of 1:1;

[0062] Conductive carbon black: superconductive carbon black JE6900;

[0063] Lubricant: polyethylene wax;

[0064] Wetting agent: simethicone;

[0065] Dispersant: a compound of oleic acid amide and erucic acid amide, the ratio of the two is 2:1;

[0066] Antioxidant: Thiodiethylenebis[3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate, tetrakis[methyl-β-(3,5-di-tert-butyl- 4-hydroxyphenyl) propionate] pentaerythritol ester, tris [2.4-di-tert-butylphenyl] phosphite and complex of 2,2,4-trimethyl-1,2-dihydroquinoline polymer ligand system, the weight ratio of the four is 1:1:2:1;

[0067] Anti-ultraviolet agent: 2-hy...

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Abstract

The invention relates to a semiconductive low-smoke zero-halogen flame-retardant polyolefin sheath material and a preparation method thereof. The semiconductive low-smoke zero-halogen flame-retardant polyolefin sheath material is made of, by weight, 60-100 parts of polyolefin resin, 40-80 parts of conductive carbon black, 20-40 parts of flame retardant, 1-5 parts of dispersing agent, 0.1-3 parts of stearate, 0.1-3 parts of silane coupling agent, 5-20 parts of lubricant, 2-8 parts of wetting agent, 3-10 parts of antioxidant and 0-3 parts of uvioresistant agent, wherein the dispersing agent is composed of oleamide, erucyl amide or mixture of the oleamide and the erucyl amide. The improved semiconductive low-smoke zero-halogen flame-retardant polyolefin sheath material special for ultrahigh-voltage cables is advantageous in comprehensive performances, especially in electricity conductivity, flame retardation performance, low cost and the like.

Description

technical field [0001] The invention relates to a cable sheath material and a preparation method thereof, in particular to a semi-conductive low-smoke halogen-free flame-retardant polyolefin sheath material and a preparation method thereof. Background technique [0002] With the rapid development of the domestic wire and cable industry, the demand for polyolefin semiconductive sheathing materials is also increasing. However, the manufacturing technology of polyolefin semiconductive sheathing materials is not yet mature, and only a few domestic companies can produce them. Most of the products are imported. When manufacturing 110KV and above ultra-high voltage cables, semi-conductive polymer materials are replacing graphite layers as the semi-conductive sheath of cables. The outer sheath of the EHV cable is made of a material with high insulation resistance. When it cannot be continuously grounded at multiple points, the sheath will form a dangerous voltage at a position far ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/08C08L33/08C08K13/06C08K9/06C08K3/04C08K3/22C08K5/098C08K5/20H01B1/24H01B3/44H01B7/295
Inventor 顾金云栾珊珊王兴宁张丽本戴红兵陈敏李小刚
Owner JIANGSU DEWEI ADVANCED MATERIALS
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