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Semi-conducting halogen-free fire retardant single-wall heat-shrinkable tube and preparation method thereof

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

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, 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 semiconductive halogen-free flame-retardant single-wall heat-shrinkable tube is composed of wall material, in which the wall material is composed of 53 parts of polyolefin mixed resin, 10 parts of conductive carbon black, 10 parts of auxiliary agent and 37 parts of flame retardant Composition; by mass percentage: the polyolefin mixed resin is prepared by melt blending four kinds of polyolefin materials: 1-30% EVA630, 1-20% EVA421, 20-50% EVA283 and 10-30% EVA220 Polyolefin hybrid resin;

[0043] 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 parts of smoke...

Embodiment 2

[0070] A semiconductive halogen-free flame-retardant single-wall heat-shrinkable tube is composed of wall material, in which the wall material is composed of 53 parts of polyolefin mixed resin, 10 parts of conductive carbon black, 10 parts of auxiliary agent and 37 parts of flame retardant Parts composition; by mass percentage: the polyolefin mixed resin is a polyolefin mixed resin prepared by melt blending four kinds of polyolefin materials of 15% EVA630, 20% EVA421, 45% EVA283 and 20% EVA220;

[0071] 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 parts of smoke s...

Embodiment 3

[0098] A semiconductive halogen-free flame-retardant single-wall heat-shrinkable tube is composed of wall material, in which the wall material is composed of 53 parts of polyolefin mixed resin, 10 parts of conductive carbon black, 10 parts of auxiliary agent and 37 parts of flame retardant Parts composition; by mass percentage: the first 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;

[0099] 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 parts of s...

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Abstract

The invention relates to a heat-shrinkable tube, in particular to a semi-conducting halogen-free fire retardant single-wall heat-shrinkable tube and a preparation method thereof. The semi-conducting fire retardant single-wall heat-shrinkable tube comprises wall materials which contain the following raw materials in parts by mass: 53 parts of polyolefin mixed resin, 10 parts of conductive black, 10 parts of assistants and 37 parts of fire retardant. The preparation method of the heat-shrinkable tube comprises the following steps of wall material preparation, extrusion, irradiation and expansion-moulding. Compared with a traditional heat-shrinkable tube, the invention has the technical characteristics that since special halogen-free fire retardant is adopted in the raw materials, the semi-conducting halogen-free fire retardant single-wall heat-shrinkable tube has better fire retardant effect, high-temperature resistant character and good performances, no pollution after burnt, cost reduction, remarkable economic benefits and environmental protection benefits; therefore, the invention is suitable for mass promotion and application.

Description

1. Technical field: [0001] The invention relates to a heat-shrinkable tube, in particular to a semiconducting halogen-free flame-retardant single-wall heat-shrinkable tube and a preparation method thereof. 2. Background technology [0002] The heat-shrinkable double-walled tube currently on the market has an inner and outer two-layer structure, which is composed of a flame-retardant polymer outer layer with a shape memory function that can shrink radially after heating and an inner rubber layer that can melt and flow at the shrinkage temperature. After heating, the inner adhesive layer melts and flows to fill. It can be widely used in aviation, aerospace, shipbuilding, automobiles, home appliances, communications, petrochemical and other fields. 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 t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08K3/04B29C61/02C08K13/06B29C69/02C09C1/28C09C3/08C08K3/34C09C1/40H02G15/18B29C71/04B29B7/72C08L23/08C08K3/22C09C3/12C09C1/02
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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