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Low-temperature-resistant fluororubber heat-shrinkable casing and manufacturing method thereof

A heat-shrinkable sleeve and fluororubber technology, applied in the field of low-temperature resistant fluororubber heat-shrinkable sleeve and its preparation, can solve the problems of poor heat-shrinkable low-temperature resistance and other problems, achieve good aging resistance, excellent low-temperature resistance, and improve The effect of low temperature performance

Inactive Publication Date: 2014-04-23
CHANGYUAN ELECTRONICS DONGGUAN +4
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is: to overcome the problem of poor low temperature resistance of the existing fluororubber heat shrinkage, and to propose a product with excellent low temperature resistance, excellent flame retardancy, excellent mechanical properties, good aging resistance, and excellent thermal shock performance. Low temperature resistant fluororubber heat shrinkable sleeve and preparation method thereof

Method used

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  • Low-temperature-resistant fluororubber heat-shrinkable casing and manufacturing method thereof
  • Low-temperature-resistant fluororubber heat-shrinkable casing and manufacturing method thereof

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preparation example Construction

[0033] The preparation method of the above-mentioned low-temperature resistant fluororubber heat-shrinkable sleeve comprises the following steps:

[0034] Step 1: According to parts by weight, weigh 100 parts of fluororubber elastomer, 20-60 parts of polyvinylidene fluoride resin, 5-10 parts of acid absorbing agent, 30-40 parts of filler, and 0.5-3 parts of plasticizer;

[0035] Step 2: After the above-mentioned components are mixed by an internal mixer and mixed and granulated by parallel twin-screws, they are extruded into pipes using a single-screw extruder;

[0036] Step 3: The pipe is cross-linked by cobalt-60 or electron accelerator 50-100KGy radiation;

[0037] Step 4: The radiation crosslinked tube is expanded 2-4 times at a temperature of 150-180°C.

preparation Embodiment 1

[0039] Take each component according to the parts by weight listed in the table below:

[0040]

[0041]

[0042] The above-mentioned materials are mixed by an internal mixer, mixed and granulated by parallel twin-screws, and extruded by a single-screw into pipes.

[0043] The tube is radiated and cross-linked by an electron accelerator of 90KGy, and the tube after radiation cross-linking expands twice at a temperature of 180°C to obtain a low-temperature resistant fluororubber heat-shrinkable sleeve, and its properties are as follows:

[0044] Flame retardancy: passed the VW-1 flame retardancy test;

[0045] Tensile strength: 11.2Mpa, elongation at break 388%;

[0046] The elongation at break after 250℃ / 168h high temperature aging is 356%;

[0047] 300℃±3℃ / 4h high temperature impact, no dripping, no cracking;

[0048] -40℃ / 4h low temperature test without cracking, no cracks;

preparation Embodiment 2

[0050] Take each component according to the parts by weight listed in the table below:

[0051]

[0052]

[0053] The above-mentioned materials are mixed by an internal mixer, mixed and granulated by parallel twin-screws, and extruded by a single-screw into pipes.

[0054] The tube is radiated and cross-linked by an electron accelerator of 90KGy, and the tube after radiation cross-linking expands twice at a temperature of 180°C to obtain a low-temperature resistant fluororubber heat-shrinkable sleeve, and its properties are as follows:

[0055] Flame retardancy: passed the VW-1 flame retardancy test;

[0056] Tensile strength: 16.9Mpa, elongation at break 321%;

[0057] The elongation at break after 250℃ / 168h high temperature aging is 293%;

[0058] 300℃±3℃ / 4h high temperature impact, no dripping, no cracking;

[0059] -40℃ / 4h low temperature test without cracking, no cracks;

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Abstract

The invention discloses a low-temperature-resistant fluororubber heat-shrinkable casing, which consists of the following components in parts by weight: 100 parts of fluororubber elastomer, 20-60 parts of polyvinylidene fluoride resin, 5-10 parts of an acid-acceptor, 30-40 parts of a filling agent and 0.5-3 parts of a plasticizer, wherein the fluororubber elastomer is a blend of two or more of a vinylidene fluoride-trifluorochloroethylene copolymer, a vinylidene fluoride-hexafluoropropylene copolymer and a vinylidene fluoride-trifluorochloroethylene-hexafluoropropylene copolymer; the polyvinylidene fluoride resin is one or a mixture of a 1,2-polyvinylidene difluoride homopolymer and a 1,2-polyvinylidene difluoride-hexafluoropropylene copolymer. The low-temperature-resistant fluororubber heat-shrinkable casing is excellent in low temperature resistance, flame retardation, mechanical property, aging resistance and thermal shock performance.

Description

technical field [0001] The invention relates to a low-temperature resistant fluorine rubber heat-shrinkable sleeve and a preparation method thereof. Background technique [0002] Viton heat-shrinkable sleeves can be widely used in the protection of electronic components in high temperature and oil-resistant environments, as well as the insulation and protection of resistors, capacitors, and thermocouples, as well as the mechanical protection of various metal wires, as well as the insulation of wire ends, connections, and terminals. Protect and reinforce. [0003] However, the fluororubber heat-shrinkable sleeves currently on the market generally have the problem of poor low-temperature resistance. Therefore, improving the low-temperature resistance of fluororubber heat-shrinkable sleeves can greatly increase the scope of product applications. Contents of the invention [0004] The technical problem to be solved by the present invention is: to overcome the problem of poor ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/16C08K13/02B29C47/00B29B9/00B29C35/10
Inventor 麦家星秦立福邱光南李可涛刘晓播
Owner CHANGYUAN ELECTRONICS DONGGUAN
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