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Medium-voltage water-tree-retardant crosslinked polyethylene cable material and preparation method thereof

A cross-linked polyethylene and anti-water tree technology, which is applied in the field of medium-voltage anti-water tree cross-linked polyethylene cable materials, can solve the problems of volatile power lines and cables, high cost, poor compatibility, etc., and achieve excellent mechanical and physical properties, The effect of fast crystallization speed and small size

Inactive Publication Date: 2015-08-26
CHANGSHU ZHONGLIAN PHOTOELECTRICITY NEW STUFF
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although domestic and foreign research on medium-pressure water-tree-resistant cross-linked polyethylene has achieved certain results, it has not yet reached the level expected by the industry. For example, there are still technical problems such as poor compatibility, high cost, and volatility. Troubled wire and cable manufacturers

Method used

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  • Medium-voltage water-tree-retardant crosslinked polyethylene cable material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A) prepare polyvinyl silane grafting material, the melt index that takes by weight is 80 parts of low-density polyethylenes of 1.8g / 10min earlier, vinyl-three (2-methoxyethoxy) silane 5 1 part, 0.1 part of dicumyl peroxide and 2 parts of 4,4'-thiobis(6-tert-butyl-3-methylphenol) were put into a stirring container for pre-mixing, and the speed of the stirring container was controlled at 200r / min , the time control of premixing is 8min, obtains polyvinyl silane mixture, then this polyvinyl silane mixture is fed into (that is, fed into) twin-screw extruder by metering pump for example by Brabender metering system and carries out grafting Extrude (the graft extrusion mentioned here is the plasticizing extrusion, the following embodiment 2 and 3 are the same example), the rotating speed control of twin-screw extruder graft extrusion is 245r / min, and twin-screw The extrusion temperature of the extruder is from the first zone to the eighth zone, and the temperature of the mach...

Embodiment 2

[0027] A) prepare polyvinyl silane grafting material, the melt index that takes by weight is 90 parts of low density polyethylene of 2.2g / 10min, vinyl-three (2-methoxyethoxy) silane 3 part, 0.1 part of dicumyl peroxide, 0.1 part of dicumyl peroxide, tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate] pentaerythritol ester 1 0.5 parts of β-(3,5-di-tert-butyl-4-hydroxyphenyl) n-octadecyl propionate and 0.5 parts of dilauryl thiodipropionate are put into the stirring container for pre-mixing, and the stirring container The rotating speed control is 300r / min, the time control of premixing is 5min, obtains polyvinyl silane mixture, then this polyvinyl silane mixture is fed to (that is, fed to) twin-screw by metering pump such as by Brabender metering system Carry out graft extruding in the extruder, the rotational speed control of twin-screw extruder graft extruding is 215r / min, and the extruding temperature of twin-screw extruder is from one district to eight districts, mac...

Embodiment 3

[0031] A) prepare polyvinyl silane grafting material, the melt index that takes by weight is 85 parts of low-density polyethylenes of 2g / 10min, 4 parts of vinyl-three (2-methoxyethoxy) silanes , 0.15 parts of diisophenyl peroxide and 3 parts of 4,4'-thiobis(6-tert-butyl-3-methylphenol) were put into a stirring container for pre-mixing, and the speed of the stirring container was controlled at 250r / min. The time of mixing is controlled to be 6.5min, obtains polyvinyl silane mixture, then this polyvinyl silane mixture is fed into (that is, fed into) twin-screw extruder by metering pump and carry out graft extruding as by Brabender metering system , the speed of graft extrusion of the twin-screw extruder is controlled to be 230r / min, and the extrusion temperature of the twin-screw extruder is controlled from the first zone to the eighth zone, and the temperature of the machine neck and the head is respectively controlled to be 120°C in the first zone , the second zone is 135°C, t...

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Abstract

The invention provides a medium-voltage water-tree-retardant crosslinked polyethylene cable material and a preparation method thereof and belongs to the technical field of wire cable materials and preparation of the wire cable materials. The medium-voltage water-tree-retardant crosslinked polyethylene cable material is prepared from raw materials as follows: 60-75 parts of polyolefin composite resin, 15-25 parts of a polyethylene silane-grafting material, 5-10 parts of water-tree-retardant composite catalytic master batch and 2-5 parts of a cross-linking agent. The polyolefin composite resin comprises raw materials as follows: 60-80 parts of low-density polyethylene and 20-40 parts of ethylene vinyl acetate copolymer; the water-tree-retardant composite catalytic master batch comprises raw materials as follows: 70-80 parts of low-density polyethylene, 3-5 parts of a catalyst, 10-15 parts of a nucleating agent, 2-5 parts of an antioxidant, 0.1-0.2 parts of a crosslinking agent and 3-5 parts of an assistant crosslinking agent. Formation of a water tree is delayed, surrounding water can be dispersed to a certain extent, formation of the water tree can be effectively inhibited, the overall physical property of the material is improved, and the material has excellent mechanical and physical properties and is environment-friendly.

Description

technical field [0001] The invention belongs to the technical field of wire and cable materials and their preparation, and in particular relates to a medium-voltage water-tree-resistant cross-linked polyethylene cable material, and also relates to a preparation method thereof. Background technique [0002] The aforementioned medium voltage concept is well known in the industry, which refers to the withstand voltage or applicable voltage level of the cable, for example, 0.6 (line voltage) / 1KV (phase voltage) and below are low-voltage cables, 3.6 (line voltage) / 6KV ( Phase voltage) to 25KV for medium voltage cables, 35-110KV for high voltage cables, and above 220KV for extra high voltage cables. The water tree mentioned above refers to the dendritic defect of the cable insulation material exposed to water in the presence of water and under the action of a strong electric field, which can easily lead to a decrease in the breakdown strength of the cable insulation and circuit fa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08L23/08C08L51/06C08K5/103C08K5/42C08K5/14C08K5/098C08K5/3492C08F255/02B29C47/92B29C48/92
CPCC08L23/06B29C48/92B29C2948/92704C08F255/02C08K5/098C08K5/103C08K5/14C08K5/34922C08K5/42C08L23/0853C08L2203/202C08L2205/025C08L2205/03C08L2207/066C08L51/06
Inventor 苏桂明张尔梅雷建设朱俊
Owner CHANGSHU ZHONGLIAN PHOTOELECTRICITY NEW STUFF
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