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Semi-conducting high-voltage fire retardant single-wall heat-shrinkable tube and preparation method thereof

A heat-shrinkable tube and high-voltage technology, applied in the direction of cable joints, etc., can solve the problem of 35kV high-voltage heat-shrinkable materials and achieve low longitudinal shrinkage

Inactive Publication Date: 2011-09-14
江苏达胜热缩防护用品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, ordinary heat shrinkable tubes can no longer meet these requirements at the same time, which brings us a new topic, that is, it is necessary to develop a heat shrinkable tube that can not only be waterproof and sealed, but also have certain mechanical strength, good electrical properties and chemical properties. A new type of heat shrinkable product
[0003] However, 35kV high-voltage heat-shrinkable materials are rarely used, and the present invention provides a heat-shrinkable material that can work under 35kV high-voltage conditions

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A semi-conductive high-voltage flame-retardant single-wall heat-shrinkable tube is composed of wall material, in which the wall material is composed of 90 parts of polyolefin mixed resin, 10 parts of conductive carbon black, 10 parts of auxiliary agent and 30 parts of flame retardant ; The flame retardant is decabromodiphenyl ether.

[0029] By mass percentage: the polyolefin mixed resin is a polyolefin mixed resin prepared by melt blending four kinds of polyolefin materials: 1-30% EVA630, 1-20% EVA421, 20-50% EVA283 and 10-30% EVA220 ;

[0030] In parts by mass, the auxiliary agent is composed of paraffin wax, antioxidant, anti-copper agent, processing stabilizer and sensitized crosslinking auxiliary agent, wherein the antioxidant tetrakis (β-(3,5-di-tert-butyl-4 -Hydroxyphenyl) propionic acid) pentaerythritol 1-3 parts; anti-copper agent MDA-1024 (hydroxyl-terminated polybutadiene acrylonitrile liquid rubber) 0.5-1 parts, processing stabilizer rare earth composite st...

Embodiment 2

[0042] A semi-conductive high-voltage flame-retardant single-wall heat-shrinkable tube is composed of wall material, in which the wall material is composed of 90 parts of polyolefin mixed resin, 10 parts of conductive carbon black, 10 parts of auxiliary agent and 30 parts of flame retardant ; The flame retardant is decabromodiphenyl ether.

[0043] By mass percentage: the polyolefin mixed resin is a polyolefin mixed resin prepared by melt blending four kinds of polyolefin materials: 15% EVA630, 20% EVA421, 45% EVA283 and 20% EVA220;

[0044]In parts by mass, the auxiliary agent is composed of paraffin wax, antioxidant, anti-copper agent, processing stabilizer and sensitized crosslinking auxiliary agent, wherein the antioxidant tetrakis (β-(3,5-di-tert-butyl-4 -Hydroxyphenyl) propionic acid) pentaerythritol 1-3 parts; anti-copper agent MDA-1024 (hydroxyl-terminated polybutadiene acrylonitrile liquid rubber) 0.5-1 parts, processing stabilizer rare earth composite stabilizer (REC...

Embodiment 3

[0056] A semi-conductive high-voltage flame-retardant single-wall heat-shrinkable tube is composed of wall material, in which the wall material is composed of 90 parts of polyolefin mixed resin, 10 parts of conductive carbon black, 10 parts of auxiliary agent and 30 parts of flame retardant ; The flame retardant is decabromodiphenyl ether.

[0057] In terms of mass percentage: the polyolefin mixed resin is a polyolefin mixed resin prepared by melt blending four kinds of polyolefin materials: 30% EVA630, 20% EVA421, 40% EVA283 and 10% EVA220;

[0058] In parts by mass, the auxiliary agent is composed of paraffin wax, antioxidant, anti-copper agent, processing stabilizer and sensitized crosslinking auxiliary agent, wherein the antioxidant tetrakis (β-(3,5-di-tert-butyl-4 -Hydroxyphenyl) propionic acid) pentaerythritol 1-3 parts; anti-copper agent MDA-1024 (hydroxyl-terminated polybutadiene acrylonitrile liquid rubber) 0.5-1 parts, processing stabilizer rare earth composite stabi...

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Abstract

The invention relates to a heat-shrinkable tube, in particular to a semi-conducting high-voltage fire retardant single-wall heat-shrinkable tube and a preparation method thereof. The semi-conducting high-voltage fire retardant single-wall heat-shrinkable tube is made of wall materials, wherein an external wall material contains the following raw materials in parts by mass: 90 parts of polyolefin mixed resin, 10 parts of conductive black, 10 parts of assistants and 30 parts of fire retardant. The preparation method of the heat-shrinkable tube comprises the following steps of preparation of internal and external wall materials, extrusion, irradiation and expansion-moulding. Compared with a traditional heat-shrinkable tube, the invention has the technical characteristics that the wall materials are fire retardant, and the heat-shrinkable tube is applied to a 35 kV high voltage, has all the service performances of the traditional heat-shrinkable tube and also has watertightness, leakproofness, corrosion-resistance and dampproof performance; in addition, the heat-shrinkable tube completely meets the environmental protection requirement of ROHS of countries of European Union and has theadvantages of low-temperature shrinkage, three-time to four-time stable expansion, low longitudinal shrinking rate and the like.

Description

1. Technical field: [0001] The invention relates to a heat-shrinkable tube, in particular to a semiconductive high-voltage flame-retardant single-wall heat-shrinkable tube and a preparation method thereof. 2. Background technology [0002] From the birth of heat shrinkable products to the present, the development speed can be said to be rapid, and the application field has been continuously expanded. At the beginning of the production of heat shrinkable products, they were mainly used for insulation protection, and now they are widely used in aviation, aerospace, ships, automobiles, home appliances, communications and petroleum. Chemical industry and other fields. Heat-shrinkable products play the role of sealing moisture-proof, waterproof, anti-corrosion and anti-vibration dislocation for cable joints and branches. Therefore, heat-shrinkable tubes are required to have good physical and electrical properties, such as wear resistance, anti-corrosion Impact resistance, high d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/08C08L9/02C08K13/02C08K3/04C08K5/06C08K5/134C08K3/38C08K5/053B29C69/02B29C71/04B29C61/02B29B7/72H02G15/18
Inventor 张志强庄向阳
Owner 江苏达胜热缩防护用品有限公司
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