Irradiation crosslinking modified ECTFE (ethylene chlorotrifluoroethylene) heat shrinkable sleeve and preparation method thereof

A heat-shrinkable sleeve and cross-linking modification technology, used in tubular articles, other household appliances, applications, etc., can solve the problems of insufficient processing adaptability, poor high temperature resistance, etc., and achieve a wide range of processing conditions and excellent applicability. performance effect

Inactive Publication Date: 2019-09-20
CHANGYUAN ELECTRONICS DONGGUAN +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, the fluororesin material used in the heat shrinkable sleeve industry in China is mainly PVDF (polyvinylidene fluoride). Compared with PVDF resin, ECTFE resin is softer, has slightly poorer high temperature resistance, and insufficient processing adaptability. There are still flaws in the application

Method used

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  • Irradiation crosslinking modified ECTFE (ethylene chlorotrifluoroethylene) heat shrinkable sleeve and preparation method thereof
  • Irradiation crosslinking modified ECTFE (ethylene chlorotrifluoroethylene) heat shrinkable sleeve and preparation method thereof
  • Irradiation crosslinking modified ECTFE (ethylene chlorotrifluoroethylene) heat shrinkable sleeve and preparation method thereof

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preparation example Construction

[0072] The preparation method of described radiation crosslinking modified ECTFE heat-shrinkable sleeve, comprises the following steps:

[0073] (1) Weigh FFKM rubber elastic body, antioxidant, acid absorbing agent, and lubricant and add them to the internal mixer for internal mixing at 170-200°C. During the internal mixing process, turn the material 5-6 times;

[0074] (2) Pour the mixed material in the step (1) into a single-screw extruder, force-feed the material through double pulls, then extrude, pull, cool, and pelletize to obtain the primary mixed pellets;

[0075] (3) Add ECTFE resin and color masterbatch to the initial mixing pellets of step (2) and stir in a mixer for 10-15 minutes together to obtain a blend;

[0076] (4) Adding the blended material to a parallel twin-screw extruder for the first time of melt extrusion, pulling, cooling, and pelletizing to obtain composite pellets;

[0077] (5) Add the composite material granules in step (4) to the homogenization de...

preparation Embodiment 1

[0089] In this embodiment, a radiation crosslinked modified ECTFE heat shrinkable sleeve is provided, comprising the following components by weight:

[0090]

[0091]

[0092] Described ECTFE resin is ethylene-chlorotrifluoroethylene copolymer;

[0093] The FFKM rubber elastomer is a terpolymer of perfluoromethyl vinyl ether, tetrafluoroethylene and perfluoro-4-carboxymethyl butyl vinyl ether;

[0094] The antioxidant is 2,5-di-tert-butyl hydroquinone;

[0095] The acid absorbing agent is light magnesium oxide;

[0096] The lubricant is a fluoropolymer processing aid PPA (a polymer of 1,1,2,3,3,3-hexafluoro-1-propene and 1,1-difluoroethylene).

[0097] The preparation method of described radiation cross-linking modified ECTFE heat-shrinkable sleeve, comprises the steps:

[0098] (1) Weigh FFKM rubber elastic body, antioxidant, acid absorbing agent, and lubricant and add them to the internal mixer for internal mixing, and turn the material at 175°C, 180°C, 185°C, 190°C, ...

preparation Embodiment 2

[0109] In this embodiment, a radiation crosslinked modified ECTFE heat shrinkable sleeve is provided, comprising the following components by weight:

[0110]

[0111] Described ECTFE resin is ethylene-chlorotrifluoroethylene copolymer;

[0112] The FFKM rubber elastomer is a terpolymer of perfluoromethyl vinyl ether, tetrafluoroethylene and perfluoro-4-carboxymethyl butyl vinyl ether;

[0113] The antioxidant is 2,5-di-tert-butyl hydroquinone;

[0114] The acid absorbing agent is light magnesium oxide;

[0115] The lubricant is a fluoropolymer processing aid PPA (a polymer of 1,1,2,3,3,3-hexafluoro-1-propene and 1,1-difluoroethylene).

[0116] The preparation method of described radiation cross-linking modified ECTFE heat-shrinkable sleeve, comprises the steps:

[0117] (1) Weigh FFKM rubber elastic body, antioxidant, acid absorbing agent, and lubricant and add them to the internal mixer for internal mixing, and turn the material at 175°C, 180°C, 185°C, 190°C, and 195°C ...

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Abstract

An irradiation crosslinking modified ECTFE (ethylene chlorotrifluoroethylene) heat shrinkable sleeve comprises, by weight, 60-90 parts of ECTFE resin, 10-30 parts of FFKM rubber elastomers, 0.1-2.0 parts of antioxidants, 0.5-5 parts of acid absorbers, 3-20 parts of color masterbatches and 1-6 parts of lubricants. The irradiation crosslinking modified ECTFE heat shrinkable sleeve has outstanding properties of resistance to high temperature, oil, chemical solvents, ageing, mechanical damage and corrosion, can meet requirements for long-term use at the temperature of minus 55 DEG C to 200 DEG C, and can be applicable to the fields such as military projects, automobiles, ships, high-speed trains and aerospace.

Description

technical field [0001] The invention relates to a radiation cross-linked modified ECTFE heat-shrinkable sleeve and a preparation method thereof. Background technique [0002] Most of the existing heat-shrinkable tubes use polyolefin polymers or copolymers. Although they have good flame retardancy and environmental protection performance, they are relatively poor in temperature resistance, oil resistance and solvent resistance, and cannot be used in automobiles, ships, and high-speed rail. High temperature resistance, oil resistance, solvent resistance and aging resistance requirements of military industry and aerospace industry. However, as the use environment becomes increasingly harsh and the demand continues to increase, its weak points such as low temperature flexibility become more and more prominent, and it cannot meet the requirements of -55°C. [0003] Ethylene-chlorotrifluoroethylene copolymer (ECTFE) is a second-generation fluorine copolymer. It is a thermoplasti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/08C08L29/10C08K5/13C08K3/22B29C48/395B29C48/92B29D23/00
CPCB29D23/001B29C48/397B29C48/92B29C2948/92704C08K2003/222C08L23/0892C08L2201/08C08L2203/18C08L2205/03C08L2312/06C08L29/10C08K5/13C08K3/22
Inventor 杨博何洪瑞刘军
Owner CHANGYUAN ELECTRONICS DONGGUAN
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