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High-pressure flame retardant single-wall heat-shrinkable pipe 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

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, 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 high-pressure flame-retardant single-wall heat-shrinkable tube is composed of a wall material, in parts by mass, wherein the wall material is composed of 90 parts of a polyolefin mixed resin, 10 parts of an auxiliary agent and 30 parts of a 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 stabilizer (REC-LS-D or REC-...

Embodiment 2

[0042] A high-pressure flame-retardant single-wall heat-shrinkable tube is composed of a wall material, in parts by mass, wherein the wall material is composed of 90 parts of a polyolefin mixed resin, 10 parts of an auxiliary agent and 30 parts of a 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-LS-D or REC-LS-F) 0.02-2...

Embodiment 3

[0056] A high-pressure flame-retardant single-wall heat-shrinkable tube is composed of a wall material, in parts by mass, wherein the wall material is composed of 90 parts of a polyolefin mixed resin, 10 parts of an auxiliary agent and 30 parts of a 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 stabilizer (REC-LS-D or REC-LS-...

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Abstract

The invention relates to a heat-shrinkable pipe, in particular to a high-pressure flame retardant single-wall heat-shrinkable pipe and a preparation method thereof. The high-pressure flame retardant single-wall heat-shrinkable pipe comprises wall materials. The wall materials comprise the following components in parts by mass: 90 parts of polyolefin mixed resin, 10 parts of auxiliary agent and 30 parts of flame retardant agent. The preparation method comprises the steps of preparing, extruding, irradiating, expanding and moulding inner wall materials of a flame retardant single-wall heat-shrinkable pipe. Compared with a traditional shrinkable pipe, the invention has the technical characteristic of flame retardance of the wall materials, can be applied to high voltage of 35kV, has all use performances of a common heat-shrinkable pipe and the performances of water prevention, seal, moisture prevention, corrosion prevention, and the like, completely meets the ROHS environmental-friendly requirement of nations, such as European Union, and the like and has the advantages of low-temperature shrinkage, stable expansion for 3 times to 4times, low longitudinal shrinkage rate, and the like.

Description

1. Technical field: [0001] The invention relates to a heat-shrinkable tube, in particular to a high-pressure 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 dielectric stre...

Claims

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Application Information

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IPC IPC(8): C08L23/08C08L9/02C08K13/02C08K5/01C08K5/134C08K3/38C08K5/053C08K5/06B29C69/02B29C71/04B29B9/00B29C47/92B29C61/02H02G15/18B29C48/92
CPCB29C48/04
Inventor 张志强王明志
Owner JIANGSU DASHENG HEAT SHRINKABLE MATERIALS
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