A water tree-resistant polyolefin cable material and a preparation method thereof

A polyolefin cable material and anti-water treeing technology, applied in the direction of plastic/resin/wax insulators, organic insulators, etc., can solve the problems of no application, achieve uniform distribution of water, reduce the probability of water treeing, excellent strength and toughness Effect

Active Publication Date: 2013-09-11
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, some foreign companies have successfully produced water-tree-resistant cable materials and put them into use, but there is no related application in China.

Method used

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  • A water tree-resistant polyolefin cable material and a preparation method thereof
  • A water tree-resistant polyolefin cable material and a preparation method thereof
  • A water tree-resistant polyolefin cable material and a preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A water-tree-resistant polyolefin cable material, comprising 70 parts by mass of low-density polyethylene with a melt index of 1.8g / 10min, 30 parts of water-tree-resistant masterbatch, 1 part of dicumyl peroxide ( DCP), 0.3 parts of triallyl isocyanurate, 1 part of tetrakis [β-(3.5-di-tert-butyl-4-hydroxyphenyl) propionate] pentaerythritol ester and 0.2 parts of 1026 rheological modification sex agent.

[0029] Among them, the anti-water tree masterbatch includes by mass components: 69.4 parts of low-density polyethylene with a melt index of 1.8g / 10min, 25.5 parts of inorganic porous particles with modified surface and 5 parts of ethylene-ethyl acrylate; , the surface-modified inorganic porous particles are obtained by treating the inorganic porous particles with a surface treatment agent, and the inorganic porous particles have a particle size less than or equal to 5 μm and a specific surface area greater than or equal to 50 m 2 / g of zeolite, the surface treatment ag...

Embodiment 2

[0035] A water-tree-resistant polyolefin cable material, comprising 80 parts by mass of low-density polyethylene with a melt index of 2.2g / 10min, 20 parts of water-tree-resistant masterbatch, and 1.5 parts of di-tert-butyl peroxide (DTBP), 0.2 parts of benzoyl peroxide, 0.2 parts of diethylaminopropylamine, 2 parts of tris[2.4-di-tert-butylphenyl] phosphite and 0.1 parts of FX-5924 rheology modifier .

[0036]Among them, the anti-water tree masterbatch includes by mass components: 69.6 parts of low-density polyethylene with a melt index of 2.2g / 10min, 20.4 parts of inorganic porous particles with modified surface and 10 parts of ethylene-vinyl acetate copolymer ; Wherein, the surface-modified inorganic porous particles are obtained by treating the inorganic porous particles with a surface treatment agent, and the inorganic porous particles have a particle size of less than or equal to 5 μm and a specific surface area of ​​greater than or equal to 50 m 2 / g of porous zinc carb...

Embodiment 3

[0042] A water-tree-resistant polyolefin cable material, comprising 85 parts by mass of low-density polyethylene with a melt index of 2.0g / 10min, 15 parts of water-tree-resistant masterbatch, and 1 part of dicumyl peroxide ( DCP), 1 part of 2,5-dimethyl-2,5-di-tert-butylperoxyhexane, 0.5 parts of diethylaminopropylamine, 2 parts of 4,4'-thiobis(6-tetra butyl m-cresol) and 0.25 phr of SD‐86 rheology modifier.

[0043] Among them, the anti-water tree masterbatch includes by mass components: 79.8 parts of low-density polyethylene with a melt index of 2.0g / 10min, 10.2 parts of inorganic porous particles whose surface has been modified, 5 parts of maleic anhydride grafted Metallic polyethylene and 5 parts of maleic anhydride grafted polyethylene, wherein the surface-modified inorganic porous particles are obtained by treating the inorganic porous particles with a surface treatment agent, and the inorganic porous particles have a particle size of less than or equal to 5 μm , the sp...

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Abstract

The invention discloses a water tree-resistant polyolefin cable material and a preparation method thereof. The water tree-resistant polyolefin cable material comprises, by mass, 70 to 95 parts of low density polyethylene, 5 to 30 parts of water tree resistant masterbatch, 1 to 2 parts of a crosslinking agent, 0.3 to 0.5 parts of a crosslinking coagent, 1 to 2 parts of an antioxidant, and 0.1 to 0.5 parts of a rheology modifier. Porous particles in the prepared water tree-resistant polyolefin cable material have adsorption characteristics, so that a more uniform distribution of water is obtained, water will not gather to be droplets, the probability of water tree growth is reduced by 50% or more than that of a conventional cross-linked polyethylene cable material, and the water tree-resistant polyolefin cable material of the invention has excellent water tree resistance; an elastic modulus ratio increases by 30% than that of a conventional cross-linked polyethylene cable material, so the water tree-resistant polyolefin cable material of the invention has excellent mechanical strength and toughness; and the water tree-resistant polyolefin cable material of the invention meet electrical performance standards of chemically cross-linked polyethylene insulation materials used for medium / low-voltage cable, etc., and has good processability.

Description

technical field [0001] The invention belongs to the field of water-tree-resistant cable materials, in particular to a water-tree-resistant polyolefin cable material and a preparation method thereof. Background technique [0002] Cross-linked polyethylene (XLPE) is widely used in power cables due to its excellent electrical and mechanical properties. The statistics of cable accidents in recent years show that in a dry environment, XLPE cables can maintain excellent performance for a long time; while in a humid environment, water trees are an important cause of premature aging and failure. In order to prolong the service life of XLPE cables in humid environments, researchers have proposed many improved methods and measures, among which more and more studies have been conducted on modified XLPE cables. In recent years, some foreign companies have successfully produced water-tree-resistant cable materials and put them into use, but there is no related application in China. Co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06H01B3/44C08K13/06C08K9/06C08K9/04C08K7/26C08K7/24C08J3/22B29B9/06B29C47/92B29C48/92
CPCB29C48/04B29C48/875B29C48/92B29C2948/9259B29C2948/92704B29C2948/92885B29C2948/92895
Inventor 徐曼郑怡李秀峰谢大荣
Owner XI AN JIAOTONG UNIV
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