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Semi-conductive high-strength halogen-free fire-retarding double-wall heat-shrinkable tube and preparation method thereof

A double-wall heat-shrinkable tube, strong technology, used in fibrous fillers, dyed low-molecular-weight organic compound treatment, dyed organic silicon compound treatment, etc. problems, to achieve significant economic and environmental protection benefits, good performance, and cost reduction effects

Active Publication Date: 2011-07-13
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

[0052] A semi-conductive strong halogen-free flame-retardant double-wall heat-shrinkable tube is composed of an outer wall material and an inner wall material, in which the outer wall material is composed of 40 parts of the first polyolefin mixed resin, 10 parts of conductive carbon black, and the first additive It is composed of 10 parts, 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 flame retardant and 10 parts of auxiliary flame retardant ; The auxiliary flame retardant is aluminum hydroxide or magnesium hydroxide;

[0053] 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;

[0054] The first auxiliary agent is composed of paraffin wax, antioxidant, anti...

Embodiment 2

[0085] A semi-conductive strong halogen-free flame-retardant double-wall heat-shrinkable tube is composed of an outer wall material and an inner wall material, in which the outer wall material is composed of 40 parts of the first polyolefin mixed resin, 10 parts of conductive carbon black, and the first additive It is composed of 10 parts, 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 flame retardant and auxiliary flame retardant; the auxiliary The flame retardant is aluminum hydroxide or magnesium hydroxide;

[0086] 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;

[0087]The first auxiliary agent is composed of paraffin wax, antioxidant, anti-copper agent, proce...

Embodiment 3

[0118] A semi-conductive strong halogen-free flame-retardant double-wall heat-shrinkable tube is composed of an outer wall material and an inner wall material, in which the outer wall material is composed of 40 parts of the first polyolefin mixed resin, 10 parts of conductive carbon black, and the first additive It is composed of 10 parts, 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 flame retardant and 10 parts of auxiliary flame retardant ; The auxiliary flame retardant is aluminum hydroxide or magnesium hydroxide;

[0119] 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;

[0120] The first auxiliary agent is composed of paraffin wax, antioxidant, anti-copper age...

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Abstract

The invention relates to a heat-shrinkable tube, in particular to a semi-conductive high-strength halogen-free fire-retarding double-wall heat-shrinkable tube and a preparation method thereof. The tube consists of an external wall material and an internal wall material. The external wall material comprises the following raw materials in part by mass: first polyolefin mixed resin 40, conductive black 10, first assistant 10, fire retardant 30 and auxiliary fire retardant 10. The internal wall material comprises the following raw materials in part by mass: second polyolefin mixed resin 50, second assistant 10, fire retardant 30 and auxiliary fire retardant 10. The preparation method comprises the preparation of the internal and external wall materials of the double-wall heat-shrinkable tube,extrusion, radiation and expansion forming. Compared with the traditional heat-shrinkable tube, the heat-shrinkable tube has the technical characteristics that: the raw materials include the fire retardant and the auxiliary fire retardant; and the product has high fire-retarding effect, high-temperature resistance, high performance, low cost and obvious economic and environmental protection benefits, avoids pollution even in burning and is suitable to be promoted and used in large scale.

Description

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

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/08C08L93/04C08L9/02C08K13/06C08K5/103C08K3/22C08K3/34C08K3/38C08K5/053C09C1/02C09C1/28C09C1/40C09C3/08C09C3/12B29C69/02B29C47/06B29C71/04B29C61/02B29B7/72H02G15/18
Inventor 张志强王明志
Owner JIANGSU DASHENG HEAT SHRINKABLE MATERIALS
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