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Medium and low pressure single wall thermal shrinkage pipe and preparation method thereof

A technology of heat-shrinkable tubes and heat-shrinkable tubes, applied in the direction of cable joints, etc., to achieve the effect of 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

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A medium-low pressure single-wall heat-shrinkable tube is composed of wall material, in which the wall material is composed of 85 parts of polyolefin mixed resin and 15 parts of auxiliary agent according to the mass parts;

[0027] By mass percentage: the polyolefin mixed resin is a polyolefin mixed resin prepared by melt blending four kinds of polyolefin materials: 10-20% EVA630, 10-20% EVA421, 20-30% EVA283 and 30-50% EVA220 ;

[0028] The auxiliary agent is composed of paraffin, antioxidant, anti-copper agent, processing stabilizer and sensitizing cross-linking 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 parts of smoke suppressant zinc borate; 1-2 parts of chemical crosslinking aid...

Embodiment 2

[0040] A medium-low pressure single-wall heat-shrinkable tube, which is composed of a wall material. According to the mass parts, the wall material is composed of 85 parts of polyolefin mixed resin and 10 parts of auxiliary agent;

[0041] The polyolefin mixed resin is a polyolefin mixed resin prepared by melt blending four kinds of polyolefin materials of 10% EVA630, 20% EVA421, 25% EVA283 and 45% EVA220 by mass percentage; (β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate) is 1 part of pentaerythritol ester, anti-copper agent is 1 part of hydroxyl-terminated polybutadiene acrylonitrile liquid rubber, rare earth composite stabilizer (REC - 2 parts of LS-D or REC-LS-F), 3 parts of zinc borate as a smoke suppressant, 1 part of trimethylolpropane as a sensitizing cross-linking auxiliary agent, and the balance is paraffin;

[0042] A method for preparing a medium-low pressure single-wall heat-shrinkable tube,

[0043] A. Preparation of wall materials:

[0044]The wall material ...

Embodiment 3

[0053] A medium-low pressure single-wall heat-shrinkable tube, which is composed of a wall material. According to the mass parts, the wall material is composed of 85 parts of polyolefin mixed resin and 10 parts of auxiliary agent;

[0054] The polyolefin mixed resin is a polyolefin mixed resin prepared by melt blending four kinds of polyolefin materials of 30% EVA630, 20% EVA421, 40% EVA283 and 10% EVA220 by mass percentage; (β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate) is 1 part of pentaerythritol ester, anti-copper agent is 1 part of hydroxyl-terminated polybutadiene acrylonitrile liquid rubber, rare earth composite stabilizer (REC - 2 parts of LS-D or REC-LS-F), 3 parts of zinc borate as a smoke suppressant, 1 part of trimethylolpropane as a sensitizing cross-linking auxiliary agent, and the balance is paraffin;

[0055] A method for preparing a medium-low pressure single-wall heat-shrinkable tube,

[0056] A. Preparation of wall materials:

[0057] The wall material...

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Abstract

The invention relates to a thermal shrinkage pipe, in particular to a medium and low pressure single wall thermal shrinkage pipe and a preparation method thereof. The medium and low pressure single wall thermal shrinkage pipe is made from a wall material which comprises 85 parts of polyolefin mixed resin and 10 parts of auxiliary agent by weight. The preparation method comprises the following steps: preparing the wall material of the medium and low-pressure single wall thermal shrinkage pipe, extruding, irradiating and expanding for molding. Compared with the traditional shrinkage pipe, the invention has the technical characteristics that an outer layer keeps the good electrical properties, chemical properties and other characteristics of a common thermal shrinkage pipe, has all operational properties of the common thermal shrinkage pipe, and also has the properties of water prevention, sealing, moisture prevention, corrosion prevention and the like.

Description

1. Technical field: [0001] The invention relates to a heat-shrinkable tube, in particular to a medium-low pressure 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 strength and ot...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/08C08L9/02C08K13/02C08K3/38C08K5/053B29C69/02B29C71/04B29C61/02B29B7/72H02G15/18
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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