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Crosslinked polyethylene cable insulating material with water treeing resisting function and preparation method of material

A cross-linked polyethylene, cable insulation technology, applied in the direction of organic insulators, plastic/resin/wax insulators, etc., can solve the problem of serious water tree phenomenon in cables, achieve superior water tree resistance, excellent strength and toughness, and The effect of superior water tree performance

Inactive Publication Date: 2014-03-12
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The object of the present invention is to provide a cross-linked polyethylene cable insulation material with anti-water tree function and its preparation method to solve the serious problem of water tree phenomenon in cables made of cross-linked polyethylene material; the cross-linked polyethylene cable insulation The material has the advantages of good inhibition of water tree growth, and good mechanical and electrical properties

Method used

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  • Crosslinked polyethylene cable insulating material with water treeing resisting function and preparation method of material
  • Crosslinked polyethylene cable insulating material with water treeing resisting function and preparation method of material
  • Crosslinked polyethylene cable insulating material with water treeing resisting function and preparation method of material

Examples

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Embodiment 1

[0038]Example 1: Using 80 parts of low-density polyethylene, 20 parts of anti-water tree modifier, 2 parts of dicumyl peroxide (DCP) (crosslinking agent), 4,4'-thiobis(6-tetra butyl m-cresol) 0.2 parts (antioxidant). The mass percent of each component of the anti-water tree modifier is: 80% of low-density polyethylene, 10% of clay, 9.9% of ethylene-vinyl acetate copolymer, and 0.1% of stearylamine.

Embodiment 2

[0039] Embodiment 2: adopt 85 parts of low-density polyethylene, 15 parts of anti-water tree modifiers, 1.3 parts of dicumyl peroxide (DCP) (crosslinking agent), tetrakis [β-(3.5-di-tert-butyl- 0.4 parts of 4-hydroxyphenyl) propionic acid] pentaerythritol ester (antioxidant), 0.2 parts of 1026 rheology modifier. The mass percentage of each component of the anti-water tree modifier is: polyolefin elastomer 75%, montmorillonite 15%, ethylene-ethyl acrylate 8.5%, lauryl ammonium salt 1%, dihexadecyl ammonium Salt 0.5%.

Embodiment 3

[0040] Embodiment 3: Adopt 85 parts of low-density polyethylene pellets, 15 parts of anti-water tree modifiers, 1.5 parts of di-tert-butyl peroxide (DTBP) (cross-linking agent), 0.2 parts of benzoyl peroxide (cross-linking agent) joint auxiliary agent), 0.1 part of diethylaminopropylamine (crosslinking auxiliary agent), 0.6 part of tris[2.4-di-tert-butylphenyl] phosphite (antioxidant), 0.1 part of FX-59240 (rheology modification agent). The mass percent of each component of the anti-water tree modifier is: 85% of low-density polyethylene, 10% of montmorillonite, 4.5% of ethylene-vinyl acetate copolymer, and 0.5% of stearylamine.

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Abstract

The invention discloses a crosslinked polyethylene cable insulating material with a water treeing resisting function and a preparation method of the material. The crosslinked polyethylene cable insulating material is prepared from the following components in parts by weight: 80-97 parts of low-density polyethylene, 3-20 parts of a water treeing resisting modifier, 1-2 parts of a crosslinking agent, 0-0.5 part of a crosslinking assistant, 0.2-0.8 part of an antioxidant and 0-0.5 part of a rheology modifier. The water treeing resisting modifier is prepared from nano silicate, a surface modifier, a polymeric compatibilizer and polyethylene. Compared with the prior art, the crosslinked polyethylene cable insulating material has the characteristics that the polyethylene, the polymeric compatibilizer and the nano silicate are melted and blended to obtain an intercalated composite material; successful intercalation of the polyethylene between nano silicate layers is ensured by an organic surface treatment agent; carbonyl on a compatibilizer molecule chain is combined with hydroxyl between the silicate layers by a hydrogen bond, and then entangled with a polymer matrix molecule chain, so that the interfacial interaction between the polymer and layered silicate is improved, and the composite material has excellent water-resistant tree performance due to the barrier property of the nano silicate layers.

Description

【Technical field】 [0001] The invention relates to the field of water-tree-resistant cable materials, in particular to a water-tree-resistant cross-linked polyethylene cable insulating material applied to medium and low-voltage power cables and a preparation method thereof. 【Background technique】 [0002] Cross-linked polyethylene (XLPE) power cables work for a long time in an electric field and an environment with moisture. In cross-linked polyethylene, water-containing channels (water branches) will be generated due to electrochemical action, which will reduce the insulation performance. If the water branches continue to grow It will turn into an electrical tree branch and cause insulation breakdown. At present, the water tree aging of medium and low voltage XLPE cables is one of the main reasons for their failure. In order to inhibit the initiation and growth of water trees, researchers have proposed a variety of methods to improve material formulations and cable structur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06H01B3/44C08K13/06C08K9/04C08K9/06C08K3/34
CPCC08L23/06C08K2201/011C08L2203/202C08L2205/025C08L2205/03C08L2205/035C08L2207/066H01B3/441C08L23/0853C08K13/06C08K9/04C08K9/06C08K3/346C08L23/00C08L23/0869C08L23/0815C08L51/06
Inventor 徐曼刘鑫李秀峰谢大荣靳红涛
Owner XI AN JIAOTONG UNIV
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