Halogen-free double-wall heat shrinkable tube of flame-retardant properties and preparing method thereof

A technology of double-wall heat-shrinkable tubes and flame retardants, which can be used in fibrous fillers, dyed low-molecular organic compound treatments, dyed organic silicon compounds, etc. Not high problems, to achieve significant economic benefits and environmental protection benefits, good performance, cost reduction effect

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, 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

[0050] A halogen-free flame-retardant double-wall heat-shrinkable tube is composed of an outer wall material and an inner wall material. According to the parts by mass, the outer wall material is composed of 53 parts of the first polyolefin mixed resin, 10 parts of the first auxiliary agent and 37 parts of the flame retardant Composition; the inner wall material is composed of 53 parts of the second polyolefin mixed resin, 19 parts of the second auxiliary agent and 37 parts of the flame retardant;

[0051] In terms of mass percentage: the first polyolefin mixed resin is a polyolefin obtained by melt blending four kinds of polyolefin materials: 1-30% EVA630, 1-20% EVA421, 20-50% EVA283 and 10-30% EVA220 mixed resin;

[0052] The first 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-hydroxybenzene base) propionic acid) pentaer...

Embodiment 2

[0083] A halogen-free flame-retardant double-wall heat-shrinkable tube is composed of an outer wall material and an inner wall material. According to the parts by mass, the outer wall material is composed of 53 parts of the first polyolefin mixed resin, 10 parts of the first auxiliary agent and 37 parts of the flame retardant Composition; the inner wall material is composed of 53 parts of the second polyolefin mixed resin, 19 parts of the second auxiliary agent and 37 parts of the flame retardant;

[0084] In terms of mass percentage: the first 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;

[0085] The first 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-hydroxybenzene base) propionic acid) pentaerythritol 1...

Embodiment 3

[0116] A halogen-free flame-retardant double-wall heat-shrinkable tube is composed of an outer wall material and an inner wall material. According to the parts by mass, the outer wall material is composed of 53 parts of the first polyolefin mixed resin, 10 parts of the first auxiliary agent and 37 parts of the flame retardant Composition; the inner wall material is composed of 53 parts of the second polyolefin mixed resin, 19 parts of the second auxiliary agent and 37 parts of the flame retardant;

[0117] In terms of mass percentage: 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;

[0118] The first 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-hydroxybenzene base) propionic acid) pentaerythritol 1-...

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Abstract

The present invention relates to a heat shrinkable tube, particularly to a halogen-free double-wall heat shrinkable tube of flame-retardant properties and a preparing method thereof. The tube is prepared from an outer wall material and an inner wall material based on shares by weight. The outer wall material consists of 53 shares of first polyolefin mixed resin, 10 shares of first auxiliaries and 37 shares of flame retardant. The inner wall material consists of 53 shares of second polyolefin mixed resin, 10 shares of second auxiliaries and 37 shares of flame retardant. The preparing method comprises: preparing the inner and the outer wall materials of the double-wall heat shrinkable tube, extruding, irradiating, expanding and molding. Compared with traditional shrinkable tubes, the present invention has the technical characteristics of adoption of special halogen-free flame retardant in raw materials, good product flame-retardant effect, heat resistance, good properties, no pollution during combustion and low cost. The present invention has obvious economic benefit and environmental 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 halogen-free flame-retardant double-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 during ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/08C08L93/04C08K13/06C08K3/22C08K3/34C08K3/38C08K5/103C09C1/02C09C1/28C09C1/40C09C3/12C09C3/08B29C69/02B29C47/06B29C71/04B29C61/02B29B7/72H02G15/18
Inventor 张志强王明志
Owner JIANGSU DASHENG HEAT SHRINKABLE MATERIALS
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