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Middle and low-pressure halogen-free flame retarding single-wall heat-shrinkable tube and manufacturing method thereof

A heat-shrinkable tube and low-pressure technology, which is applied in the treatment of dyed low-molecular organic compounds, fibrous fillers, dyed organic silicon compounds, etc., can solve the problems of high cost, low quality of double-walled tubes, and poor flame retardant effect. , to achieve low longitudinal shrinkage, significant economic benefits and environmental protection benefits, and good performance

Inactive Publication Date: 2011-09-28
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 medium and low pressure halogen-free flame-retardant single-wall heat shrinkable tube is composed of wall material, according to the mass parts, the wall material is 70 parts of polyolefin mixed resin, 10 parts of auxiliary agent, 20 parts of flame retardant and auxiliary flame retardant 10 parts composition; auxiliary flame retardant is aluminum hydroxide or magnesium hydroxide;

[0044] According to mass percentage: the polyolefin mixed resin is a polyolefin mixed resin prepared by melt blending of four 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, copper inhibitor, processing stabilizer and sensitizing cross-linking auxiliary agent, wherein the antioxidant four (β-(3,5-di-tert-butyl-4-hydroxyphenyl) Propionic acid) 1-3 parts of pentaerythritol, anti-copper MDA-1024 (hydroxy-terminated polybutadiene acrylonitrile liquid rubber) 0.5-1 parts, processing stabilizer ...

Embodiment 2

[0073] A medium and low pressure halogen-free flame-retardant single-wall heat-shrinkable tube is composed of wall material, according to the mass parts, the wall material is 70 parts of polyolefin mixed resin, 10 parts of additives, 20 parts of flame retardant and auxiliary flame retardant 10 parts composition; olefin mixed resin is a polyolefin mixed resin prepared by melt blending of four polyolefin materials of 15% EVA630, 20% EVA421, 45% EVA283 and 20% EVA2200;

[0074] The additives are composed of paraffin wax, antioxidants, copper antioxidants, processing stabilizers and sensitizing crosslinking aids, wherein the antioxidant four (β-(3,5-di-tert-butyl-4-hydroxyphenyl) Propionic acid) 1-3 parts of pentaerythritol, anti-copper MDA-1024 (hydroxy-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 parts; 2-4 parts of smoke suppressant zinc borate, 1-2 parts of sensitizing cross...

Embodiment 3

[0100] A medium and low pressure halogen-free flame-retardant single-wall heat-shrinkable tube is composed of wall material, according to the mass parts, the wall material is 70 parts of polyolefin mixed resin, 10 parts of additives, 20 parts of flame retardant and auxiliary flame retardant 10 parts composition;

[0101] By mass percentage: the polyolefin mixed resin is a polyolefin mixed resin prepared by melt blending of four polyolefin materials: 30% EVA630, 20% EVA421, 40% EVA283 and 10% EVA220;

[0102] The additives are composed of paraffin wax, antioxidants, copper antioxidants, processing stabilizers and sensitizing crosslinking aids, wherein the antioxidant four (β-(3,5-di-tert-butyl-4-hydroxyphenyl) Propionic acid) 1-3 parts of pentaerythritol, anti-copper MDA-1024 (hydroxy-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 parts; 2-4 parts of smoke suppressant zinc borat...

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Abstract

The invention relates to a heat-shrinkable tube, in particular to a middle and low-pressure halogen-free flame-retarding single-wall heat-shrinkable tube and a manufacturing method thereof. The tube is composed of a wall. The material of the comprises the following components by mass: 70 portions of polyolefine mixed resin, 10 portions of auxiliary agent, 20 portions of flame retardant and 10 portions of auxiliary flame retardant. The manufacturing method comprises the step of preparing the inner wall material of the single-wall heat-shrinkable tube, extruding, radiating, expanding and forming. Compared with the traditional technology for manufacturing heat-shrinkable tube, the invention has the characteristics that the halogen-free flame retardant is adopted, the product has good flame retardant effectiveness, high temperature resistance, no pollution even in combustion and low cost; the product is applicable to operating under the conditions of 10 kV, has significant economical 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 medium and 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 pipes currently on the market can be widely used in aviation, aerospace, shipbuilding, automobiles, home appliances, communications, petrochemicals and other fields. They can be flame-retardant, sealed, moisture-proof, waterproof, and line connections and branches. Anti-corrosion, anti-vibration dislocation, etc. The halogen-containing flame retardant is used in the formulation of the conventional outer layer material, which has the disadvantages of high smoke and high toxicity during combustion, which is likely to cause secondary fire disasters. 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): C08L23/08C08L9/02C08K13/06C08K3/22C08K3/34C08K3/38C08K5/053C09C1/02C09C1/28C09C1/40C09C3/08C09C3/12B29C69/02B29C71/04B29C61/02B29B7/72H02G15/18
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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