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Semiconduction high-voltage halogen-free flame retardant single-wall heat-shrinkable tube and preparation method thereof

A heat-shrinkable tube and high-pressure technology, applied in the direction of cable joints, etc., can solve the problems of poor flame retardancy, high cost, and low quality of double-walled tubes, and achieve significant economic benefits and environmental protection benefits, low longitudinal shrinkage, The effect of good performance

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, in the prior art, there are many disadvantages of low quality, high cost or poor flame retardant effect for double-walled tubes with halogen-free flame retardants.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] A semi-conductive high-voltage halogen-free flame-retardant single-wall heat-shrinkable tube is composed of wall material, in which the wall material is composed of 80 parts of polyolefin mixed resin, 10 parts of conductive carbon black, 10 parts of auxiliary agent, flame retardant 20 parts and 10 parts of auxiliary flame retardant; the auxiliary flame retardant is aluminum hydroxide or magnesium hydroxide;

[0044] 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 ;

[0045] The auxiliary agent is composed of paraffin wax, antioxidant, anti-copper agent, processing stabilizer and sensitizing crosslinking auxiliary agent, wherein the antioxidant tetrakis (β-(3,5-di-tert-butyl-4-hydroxyphenyl) Propionic acid) 1-3 parts of pentaerythritol, anti-copper agent MDA-1024 (hydroxyl-terminated polybutadiene acrylonitrile liquid rubbe...

Embodiment 2

[0073] A semi-conductive high-voltage halogen-free flame-retardant single-wall heat-shrinkable tube is composed of wall material, in which the wall material is composed of 80 parts of polyolefin mixed resin, 10 parts of conductive carbon black, 10 parts of auxiliary agent, flame retardant 20 parts and 10 parts of auxiliary flame retardant; the olefin mixed resin is a polyolefin mixed resin prepared by melting and blending four kinds of polyolefin materials: 15% EVA630, 20% EVA421, 45% EVA283 and 20% EVA2200;

[0074] The auxiliary agent is composed of paraffin wax, antioxidant, anti-copper agent, processing stabilizer and sensitizing crosslinking auxiliary agent, wherein the antioxidant tetrakis (β-(3,5-di-tert-butyl-4-hydroxyphenyl) Propionic acid) 1-3 parts of pentaerythritol, anti-copper agent MDA-1024 (hydroxyl-terminated polybutadiene acrylonitrile liquid rubber) 0.5-1 part, processing stabilizer rare earth composite stabilizer (REC-LS-D or REC-LS- F) 0.02-2 parts; 2-4 pa...

Embodiment 3

[0100] A semi-conductive high-voltage halogen-free flame-retardant single-wall heat-shrinkable tube is composed of wall material, in which the wall material is composed of 80 parts of polyolefin mixed resin, 10 parts of conductive carbon black, 10 parts of auxiliary agent, flame retardant 20 parts and 10 parts of auxiliary flame retardant;

[0101] 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;

[0102] The auxiliary agent is composed of paraffin wax, antioxidant, anti-copper agent, processing stabilizer and sensitizing crosslinking auxiliary agent, wherein the antioxidant tetrakis (β-(3,5-di-tert-butyl-4-hydroxyphenyl) Propionic acid) 1-3 parts of pentaerythritol, anti-copper agent MDA-1024 (hydroxyl-terminated polybutadiene acrylonitrile liquid rubber) 0.5-1 part, processing stabilizer rare earth composite stabilizer (REC-LS-D ...

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Abstract

The invention relates to a heat-shrinkable tube, in particular to a semiconduction high-voltage halogen-free flame retardant single-wall heat-shrinkable tube and a preparation method thereof. The heat-shrinkable tube consists of a wall, and materials of the wall comprise the following raw materials in parts by weight: 80 parts of polyolefin mixed resin, 10 parts of conductive carbon black, 10 parts of auxiliary agent, 20 parts of flame retardant and 10 parts of auxiliary flame retardant. The preparation method comprises the following steps of: preparing the material of the inner wall of the single-wall heat-shrinkable tube; extruding; irradiating; expanding; and molding. Compared with the traditional shrinkable tubes, the single-wall heat-shrinkable tube has the technical characteristics that the halogen-free flame retardant is adopted in the raw materials, and the product has good flame retardant effect, high temperature resistance, no pollution during combustion and reduced cost, issuitable for working under a high-voltage condition of 35kV, has obvious economic benefits and environment protection benefits and is suitable for large-scale popularization and application.

Description

1. Technical field: [0001] The invention relates to a heat-shrinkable tube, in particular to a semiconductive high-voltage halogen-free flame-retardant single-wall heat-shrinkable tube and a preparation method thereof. 2. Background technology [0002] The heat-shrinkable single-wall tubes currently on the market can be widely used in aviation, aerospace, ships, automobiles, home appliances, communications, petrochemicals and other fields, and can be flame-retardant, sealed, moisture-proof, waterproof, and line Anti-corrosion, anti-vibration dislocation and other functions. In the formulation of conventional outer layer materials, halogen-containing flame retardants are used, which have the disadvantages of high smoke generation and high toxicity during combustion, and are likely to cause secondary disasters of fire. At present, the country's requirements for environmental protection are getting higher and higher, and halogen-free flame retardants have been used in many fie...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/08C08K13/06C08K9/06C08K9/04C08K3/22C08K3/34B29C69/02B29C71/04B29B9/00B29C47/92B29C61/02H02G15/18B29C48/40B29C48/92
CPCB29C48/04B29C48/40
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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