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Semiconduction double-wall heat-shrinkable tube and preparation method thereof

A technology of double-wall heat-shrinkable tube and wall material, applied in the direction of cable joints, etc., to achieve the effect of wide application field and low longitudinal shrinkage rate

Inactive Publication Date: 2010-06-30
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

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A semiconducting double-walled heat-shrinkable tube, which is composed of an outer wall material and an inner wall material. According to the mass fraction, the outer wall material is composed of 70 parts of the first polyolefin mixed resin, 20 parts of the first auxiliary agent and 10 parts of conductive carbon black Composition; The inner wall material is composed of 70 parts of the second polyolefin mixed resin and 30 parts of the second auxiliary agent;

[0036] The first polyolefin mixed resin is a polyolefin mixed resin prepared by melt-blending four polyolefin materials: 1-30% EVA630, 1-20% EVA421, 20-50% EVA283 and 10-30% EVA220 by mass percentage. Resin, the first auxiliary agent is 1-3 parts of antioxidant, 0.5-1 part of anti-copper agent, 0.02-2 parts of processing stabilizer, 2-4 parts of smoke suppressant, 1-3 parts of sensitizing cross-linking auxiliary agent 2 parts, the balance is paraffin;

[0037] The second polyolefin mixed resin is a polyolefin mixe...

Embodiment 2

[0052] A semiconducting double-walled heat-shrinkable tube, which is composed of an outer wall material and an inner wall material. According to the mass fraction, the outer wall material is composed of 70 parts of the first polyolefin mixed resin, 20 parts of the first auxiliary agent and 10 parts of conductive carbon black Composition; The inner wall material is composed of 70 parts of the second polyolefin mixed resin and 30 parts of the second auxiliary agent;

[0053] The first polyolefin mixed resin is a polyolefin mixed resin prepared by melt blending four polyolefin materials of 15% EVA630, 20% EVA421, 45% EVA283 and 20% EVA220 by mass percentage; the first auxiliary agent 1 part of tetrakis(β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate) pentaerythritol ester as antioxidant, 1 part of copper-resistant hydroxyl-terminated polybutadiene acrylonitrile liquid rubber, rare earth compound Stabilizer (REC-LS-D or REC-LS-F) 2 parts, smoke suppressant zinc borate 3 parts, se...

Embodiment 3

[0069] A semiconducting double-walled heat-shrinkable tube is composed of an outer wall material and an inner wall material, and the outer wall material is composed of 70 parts of a first polyolefin mixed resin, 20 parts of a first additive and 10 parts of conductive carbon black according to the mass fraction; The inner wall material consists of 70 parts of the second polyolefin mixed resin and 30 parts of the second auxiliary agent;

[0070] The first 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 by mass percentage; the first auxiliary agent 1 part of tetrakis(β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate) pentaerythritol ester as antioxidant, 1 part of copper-resistant hydroxyl-terminated polybutadiene acrylonitrile liquid rubber, rare earth compound Stabilizer (REC-LS-D or REC-LS-F) 2 parts, smoke suppressant zinc borate 3 parts, sensitizing cross-linking...

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PUM

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Abstract

The invention relates to a heat-shrinkable tube, in particular to a semiconduction double-wall heat-shrinkable tube and a preparation method thereof. The semiconduction double-wall heat-shrinkable tube consists of an outer wall material and an inner wall material, wherein the outer wall material comprises the following components in parts by weight: 70 parts of first polyolefin mixed resin, 20 parts of first auxiliary agent and 10 parts of conductive carbon black; and the inner wall material comprises the following components in parts by weight: 70 parts of second polyolefin mixed resin, 30 parts of second auxiliary agent and 10 parts of conductive carbon black. The preparation method comprises the following steps of: preparing the inner and outer wall material of the double-wall heat-shrinkable tube; extruding; irradiating; expanding; and molding. Compared with the traditional heat-shrinkable tubes, the double-wall heat-shrinkable tube has the technical characteristics that the inner wall material can be water proof and air-tight; the outer wall material maintains good properties of electrical properties, chemical properties, and the like of ordinary heat-shrinkable tubes, not only has all use properties of the ordinary heat-shrinkable tubes, but also has the properties of waterproofing, air-tightness, damp proofing, anticorrosion, and the like, completely meets the requirement on environmental protection of the ROHS (Restriction of the use of certain Hazardous Substances) instruction of EU (European Union) countries, and the like and has the advantages of low-temperature shrinking, stable expansion from three to four times, low longitudinal shrinkage rate, and the like.

Description

1. Technical field: [0001] The invention relates to a heat-shrinkable tube, in particular to a semiconductive double-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 other ...

Claims

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Application Information

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IPC IPC(8): C08L23/08C08L93/04C08L9/02C08K13/02C08K3/04C08K5/103C08K3/38C08K5/053B29C69/02B29C47/06B29C71/04B29C61/02B29B7/72H02G15/18
Inventor 张志强王明志
Owner JIANGSU DASHENG HEAT SHRINKABLE MATERIALS
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