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Low-voltage halogen-free retarding two-wall heat-shrinkage tube and preparation method thereof

A double-wall heat-shrinkable tube, low pressure technology, applied in the treatment of dyed low-molecular-weight organic compounds, fibrous fillers, dyed silicone compounds, etc., can solve the problem of poor flame retardant effect, high cost, and low quality of double-wall tubes. 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

[0051] A low-pressure 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 60 parts of the first polyolefin mixed resin, 10 parts of the first auxiliary agent, and 20 parts of the flame retardant part and 10 parts of auxiliary flame retardant; the inner wall material is composed of 60 parts of the second polyolefin mixed resin, 10 parts of the second auxiliary agent, 20 parts of flame retardant and 10 parts of auxiliary flame retardant; the auxiliary flame retardant is hydrogenated aluminum or magnesium hydroxide;

[0052] 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;

[0053] The first auxiliary agent is composed of paraffin wax, antioxidant, anti-copper agent, proces...

Embodiment 2

[0085] A low-pressure 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 60 parts of the first polyolefin mixed resin, 10 parts of the first auxiliary agent, and 20 parts of the flame retardant part and 10 parts of auxiliary flame retardant; the inner wall material is composed of 60 parts of the second polyolefin mixed resin, 10 parts of the second auxiliary agent, 20 parts of flame retardant and auxiliary flame retardant; the auxiliary 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, processing stabilizer and sensit...

Embodiment 3

[0118] A low-pressure 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 60 parts of the first polyolefin mixed resin, 10 parts of the first auxiliary agent, and 20 parts of the flame retardant part 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, 20 parts of flame retardant and 10 parts of auxiliary flame retardant; the auxiliary flame retardant is hydrogenated aluminum 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 agent, processing stabil...

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Abstract

The invention relates to a heat-shrinkage tube, in particular to a low-voltage halogen-free retarding two-wall heat-shrinkage tube and a preparation method thereof. The low-voltage halogen-free retarding two-wall heat-shrinkage tube comprises an outer wall material and an inner wall material, wherein the outer wall material comprises 60 parts by mass of first polyolefin mixed resin, 10 parts by mass of first assistant, 20 parts by mass of fire retardant and 10 parts by mass of auxiliary fire retardant; and the inner wall material comprises 60 parts by mass of second polyolefin mixed resin, 10parts by mass of second assistant, 20 parts by mass of fire retardant and 10 parts by mass of auxiliary fire retardant. The preparation method comprises the following steps of preparing, extruding, radiating and expanding to form the inner wall material and the outer wall material of the two-wall heat-shrinkage tube. Compared with the traditional heat-shrinkage tube, the invention has the technical characteristics that because the fire retardant and the auxiliary fire retardant are adopted in the raw materials, the low-voltage halogen-free retarding two-wall heat-shrinkage tube has good retarding property, high temperature resistance, better property, no pollution in combustion, cost reduction and remarkable economic and environmental-friendly benefits, and is suitable for massive popularization and application.

Description

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

Claims

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Application Information

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