Strong halogen-free flame-retardant single-wall heat-shrinkable tube and preparation method thereof

A heat-shrinkable tube, strong technology, applied in the direction of fibrous filler, dyed low-molecular-weight organic compound treatment, dyed organic silicon compound treatment, etc. Achieve significant economic and environmental protection benefits, low longitudinal shrinkage, and good performance

Inactive Publication Date: 2014-09-24
JIANGSU DASHENG HEAT SHRINKABLE MATERIALS
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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

[0046] A strong halogen-free flame-retardant single-wall heat-shrinkable tube is composed of wall material, in which the wall material is composed of 50 parts of polyolefin mixed resin, 10 parts of auxiliary agent, 30 parts of flame retardant and 10 parts of auxiliary flame retardant The inner wall material is composed of 50 parts of the second polyolefin mixed resin, 10 parts of the second auxiliary agent, 30 parts of the flame retardant and 10 parts of the auxiliary flame retardant; the auxiliary flame retardant is aluminum hydroxide or magnesium hydroxide;

[0047] 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 ;

[0048] 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-hy...

Embodiment 2

[0079] A strong halogen-free flame-retardant single-wall heat-shrinkable tube is composed of wall material, in which the wall material is composed of 50 parts of polyolefin mixed resin, 10 parts of auxiliary agent, 30 parts of flame retardant and 10 parts of auxiliary flame retardant The inner wall material is composed of 50 parts of the second polyolefin mixed resin, 10 parts of the second auxiliary agent, 30 parts of the flame retardant and an auxiliary flame retardant; the auxiliary flame retardant is aluminum hydroxide or magnesium hydroxide;

[0080] 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% EVA2200;

[0081] 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 ...

Embodiment 3

[0112] A strong halogen-free flame-retardant single-wall heat-shrinkable tube is composed of wall material, in which the wall material is composed of 50 parts of polyolefin mixed resin, 10 parts of auxiliary agent, 30 parts of flame retardant and 10 parts of auxiliary flame retardant The inner wall material is composed of 53 parts of the second polyolefin mixed resin, 10 parts of the second auxiliary agent, 30 parts of the flame retardant and 10 parts of the auxiliary flame retardant; the auxiliary flame retardant is aluminum hydroxide or magnesium hydroxide;

[0113] 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;

[0114] 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-hydro...

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Abstract

The invention relates to a heat-shrinkable tube, and particularly relates to a strong halogen-free flame-retardant single-wall heat-shrinkable tube and a preparation method thereof. The heat-shrinkable tube comprises wall materials which is composed of, by mass, 50 parts of polyolefin mixed resin, 10 parts of an auxiliary agent, 30 parts of a flame retardant, and 10 parts of an auxiliary flame retardant; the preparation method comprises the steps of preparation of the inner wall material of the single-wall heat-shrinkable tube, extrusion, irradiation, and expansion moulding. When compared with technical characteristics of conventional shrinkable tubes, the heat-shrinkable tube of the invention adopts the flame retardant and the auxiliary flame retardant in the raw materials, is good in flame retardance, resistant to high temperature, and good in performance, causes no pollution even during combustion, is low in cost, has significant economic benefit and environment protection benefit, 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 strong 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 toxicity ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/08C08L9/02C08K13/06C08K3/22C08K3/34C08K3/38C08K5/053C09C1/02C09C1/28C09C1/40C09C3/08C09C3/12B29C69/02B29C71/04B29C61/02B29B7/72H02G15/18
CPCC08L23/0853B29B7/72B29C61/02B29C69/02B29C71/04C08L2201/02C08L2201/22C08L2203/18C08L2205/025C08L2205/035C08L2312/06C09C1/028C09C1/28C09C1/40C09C1/407C09C1/42C09C3/08C09C3/12
Inventor 张志强庄向阳
Owner JIANGSU DASHENG HEAT SHRINKABLE MATERIALS
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