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Semiconductor low-pressure halogen free flame retardant single-wall heat-shrinkable tube and preparation method thereof

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

Active Publication Date: 2010-05-05
JIANGSU DASHENG HEAT SHRINKABLE MATERIALS
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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

[0042] A semi-conductive low-pressure halogen-free flame-retardant single-wall heat-shrinkable tube is composed of wall material, in which the wall material is composed of 60 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;

[0043] 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 ;

[0044] 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

[0072] A semi-conductive low-pressure halogen-free flame-retardant single-wall heat-shrinkable tube is composed of wall material, in which the wall material is composed of 60 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;

[0073] 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

[0099] A semi-conductive low-pressure halogen-free flame-retardant single-wall heat-shrinkable tube is composed of wall material, in which the wall material is composed of 60 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;

[0100] 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;

[0101] 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 semiconductor low-pressure halogen free flame retardant single-wall heat-shrinkable tube and a preparation method thereof. The heat-shrinkable tube consists of a wall which is prepared from the following components in parts by weight: 60 parts of mixed polyolefin 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: preparation of an inner wall material of the single-wall heat-shrinkable tube; extrusion; irradiation; and extending and molding. Compared with conventional shrinkable tubes, due to the adoption of the halogen free flame retardant in the raw materials, the heat-shrinkable tube has the characteristics of good flame retardant effect, high temperature resistance, good performance, no pollution even when burnt, cost reduction, obvious economic benefit and environment protection benefit and is suitable for being popularized and applied in a large scale.

Description

1. Technical field: [0001] The invention relates to a heat-shrinkable tube, in particular to a semiconductive low-pressure 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 Applications(China)
IPC IPC(8): C08L23/08C08K13/06C08K9/06C08K9/04C08K3/22C08K3/34B29C69/02B29C71/04B29B9/00B29C47/92B29C61/02H02G15/18B29C48/40B29C48/92
CPCB29C48/92B29C2948/92704B29C48/04B29C48/09B29C48/40B29C2948/9259B29C2948/92885B29C2948/92895
Inventor 张志强庄向阳
Owner JIANGSU DASHENG HEAT SHRINKABLE MATERIALS
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