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Puncture-resistant heat-shrinkable double-wall pipe and preparation method thereof

A heat-shrinkable, double-walled tube technology, applied in the field of heat-shrinkable tubes, can solve the problems of potential safety hazards, loss of personnel and property, poor fluidity of the inner rubber layer, etc., to improve mechanical strength and tensile strength, excellent mechanical Strength and tensile strength, the effect of alleviating the trouble of cross-linking

Inactive Publication Date: 2018-05-01
SHANGHAI CHANGYUAN ELECTRONICS MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the use of automotive wiring harnesses, there are inevitably metal burrs in the crimping area. The outer skin of the heat shrinkable tube is in a highly elastic state during the heating and shrinking process, and it is easy to be pierced by the residual metal burrs, which poses a safety hazard.
At the same time, the fluidity of the inner rubber layer also directly affects the sealing performance. The fluidity of the inner rubber layer is not good. During the heating and shrinking process of the heat shrinkable tube, the inner rubber layer is difficult to fill the gap between the wires, resulting in the failure of the wire harness seal, which will cause the car Failure of electronic or circuit systems, resulting in personal and property damage

Method used

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  • Puncture-resistant heat-shrinkable double-wall pipe and preparation method thereof
  • Puncture-resistant heat-shrinkable double-wall pipe and preparation method thereof
  • Puncture-resistant heat-shrinkable double-wall pipe and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A raw material for a puncture-resistant heat-shrinkable double-walled tube (according to parts by weight):

[0037] (1) The outer skin material includes the following components: 40 parts of high-density polyethylene with a melt index of 0.1g / 10min, 60 parts of linear low-density polyethylene with a melt index of 0.5 / 10min, liquid acrylate rubber and liquid polybutylene 5 parts of the mixture of olefin rubber, 5 parts of ethylene acrylate maleic anhydride copolymer, 50 parts of the mixture of magnesium hydroxide, silicate, melamine cyanurate, 10 parts of the mixture of zinc oxide, antimony trioxide and amine polyphosphate part, 0.2 part of silicone oil, 1 part of tetrakis[beta-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid]pentaerythritol, and 0.5 part of trimethylolpropane trimethacrylate. As shown in Table 1:

[0038] Table 1:

[0039]

[0040]

[0041]The inner sizing material comprises the following components: 80 parts of polyamide with a relative molecu...

Embodiment 2

[0053] A raw material for a puncture-resistant heat-shrinkable double-walled tube (according to parts by weight):

[0054] (1) The outer skin material includes the following components: 80 parts of high-density polyethylene with a melt index of 5g / 10min, 20 parts of linear low-density polyethylene with a melt index of 5g / 10min, 20 parts of liquid acrylate rubber, ethylene vinyl acetate 2 parts of ester maleic anhydride copolymerization, 20 parts of a mixture of aluminum hydroxide, decabromodiphenylethane and melamine cyanurate, 25 parts of a mixture of zinc oxide and colloidal antimony pentoxide, 1 part of silicone oil, tetrakis[β- (3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid] pentaerythritol ester 0.5 part, trimethylolpropane trimethacrylate 2 parts. As shown in Table 3:

[0055] Form 3:

[0056]

[0057]

[0058] The inner sizing material includes the following components: 60 parts of polyamide with a relative molecular weight of 100,000 and a softening point of...

Embodiment 3

[0071] A raw material for a puncture-resistant heat-shrinkable double-walled tube (according to parts by weight):

[0072] (1) The outer skin material includes the following components: 60 parts of high-density polyethylene with a melt index of 1g / 10min, 40 parts of linear low-density polyethylene with a melt index of 1.5g / 10min, ethylene-octene copolymer and chlorinated polyethylene 10 parts of the mixture of ethylene acrylate maleic anhydride copolymer, 3 parts of the mixture of ethylene acrylate maleic anhydride copolymer, 40 parts of the mixture of magnesium hydroxide, silicate, melamine cyanurate, 40 parts of the mixture of zinc oxide, antimony trioxide and amine polyphosphate, 0.5 part of silicone oil, 0.8 part of tetrakis[beta-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid]pentaerythritol ester, 1.5 part of trimethylolpropane trimethacrylate, as shown in Table 5 :

[0073] Form 5:

[0074]

[0075] The inner sizing material includes the following components: 70 ...

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Abstract

The invention discloses a puncture-resistant heat-shrinkable double-wall pipe. The puncture-resistant heat-shrinkable double-wall pipe comprises an outer skin and an inner adhesive, wherein the outerskin material comprises the following components in parts by weight: 40-80 parts of high-density polyethylene, 20-60 parts of linear low-density polyethylene, 5-20 parts of a toughening agent, 2-5 parts of a cosolvent, 20-50 parts of a flame retardant, 10-25 parts of a flame retardant synergist, 0.2-1 part of a lubricant, 0.5-1 part of an antioxidant and 0.5-2 parts of a sensitizing agent; the inner adhesive material comprises the following components in parts by weight: 60-80 parts of polyamide, 20-40 parts of a compatibilizer, 2-10 parts of a tackifier, 0.5-3 parts of a viscosity regulator and 0.5-2 parts of a crosslinking inhibitor. The puncture-resistant heat-shrinkable double-wall pipe has excellent mechanical strength and puncture resistance and can effectively protect internal electric wires, and the inner adhesive has good fluidity and excellent sealing performance.

Description

technical field [0001] The invention belongs to the technical field of heat-shrinkable tubes, in particular to a puncture-resistant heat-shrinkable double-wall tube and a preparation method thereof. Background technique [0002] Heat-shrinkable double-walled tube is a semi-flexible or semi-rigid heat-shrinkable tube with hot-melt adhesive on the inner layer. The outer layer is composed of radiation cross-linked polyolefin material. The glue melts when heated to bond the double-walled pipe to the object to be protected, thereby achieving the function of insulating and sealing. Mainly used in aviation, aerospace, automobile, home appliances, communication, petrochemical and other fields, it plays the role of insulating and sealing protection for wiring harnesses, cable connections and branches. [0003] With the advancement of my country's automobile localization, the use of domestic automobiles has increased sharply, and the application of heat shrinkable tubes in the field ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/08C08L23/06C08L33/04C08L9/00C08L77/00C08L93/04C08L57/02C08L91/06C08L23/28C08K13/02C08K3/22C08K3/34C08K5/3492C08K3/32
Inventor 饶小波甘立民乔稳何艳王志
Owner SHANGHAI CHANGYUAN ELECTRONICS MATERIAL
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