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Elastic polyvinylidene fluoride heat-shrinkable sleeve and preparation method thereof

A polyvinylidene fluoride and heat-shrinkable sleeve technology, applied in the field of elastic polyvinylidene fluoride heat-shrinkable sleeve and its preparation, can solve problems such as cracking and whitening, and achieve improved elasticity, good mechanical properties, and low-temperature impact performance. excellent effect

Active Publication Date: 2014-04-30
CHANGYUAN ELECTRONICS DONGGUAN +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, due to the material of the fluoroplastic heat-shrinkable tube itself, it shrinks to the wiring harness and pipeline to increase the overall hardness. At the same time, there is a risk of whitening and cracking after too many times of bending. Therefore, for the fluoroplastic heat-shrinkable tubes currently on the market made new demands

Method used

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  • Elastic polyvinylidene fluoride heat-shrinkable sleeve and preparation method thereof
  • Elastic polyvinylidene fluoride heat-shrinkable sleeve and preparation method thereof
  • Elastic polyvinylidene fluoride heat-shrinkable sleeve and preparation method thereof

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preparation example Construction

[0035] The present invention also proposes a method for preparing the elastic polyvinylidene fluoride heat-shrinkable sleeve, comprising the following steps:

[0036] Step 1: According to parts by weight, take 85-95 parts of polyvinylidene fluoride plastic; 5-15 parts of fluororubber elastomer; 1-3 parts of antioxidant; 2-5 parts of auxiliary crosslinking agent; 8 parts; 0.5-2 parts of acid absorbing agent; 2-5 parts of color masterbatch;

[0037] Step 2: The above components are kneaded and granulated by parallel twin-screws, and then extruded into pipes with a single-screw extruder;

[0038] Step 3: The tube is cross-linked by cobalt-60 or electron accelerator 50-100KGy radiation, and the tube after radiation cross-linking is expanded 2-4 times at a temperature of 150-180°C.

preparation Embodiment 1

[0040] Weigh each component according to the weight listed in the table below:

[0041]

[0042]

[0043] The above materials are mixed and granulated by parallel twin-screws, and then extruded into pipes by a single-screw extruder.

[0044] The tube is irradiated and cross-linked by an electron accelerator of 80KGy, and the tube after radiation cross-linking is expanded twice at a temperature of 180°C to obtain an elastic polyvinylidene fluoride heat-shrinkable sleeve, and its properties are as follows:

[0045] Flame retardancy: passed the VW-1 flame retardancy test;

[0046] Tensile strength: 36.8Mpa, elongation at break 413%;

[0047] The elongation at break after 250℃ / 168h high temperature aging is 381%;

[0048] 300℃±3℃ / 4h high temperature impact, no dripping, no cracking;

[0049] -55℃ / 4h low temperature impact without cracking;

[0050] The finished tube has excellent elasticity.

preparation Embodiment 2

[0052] Weigh each component according to the weight listed in the table below:

[0053]

[0054] The above materials are mixed and granulated by parallel twin-screws, and then extruded into pipes by a single-screw extruder.

[0055] The tube is irradiated and cross-linked by an electron accelerator of 80KGy, and the tube after radiation cross-linking is expanded twice at a temperature of 180°C to obtain an elastic polyvinylidene fluoride heat-shrinkable sleeve, and its properties are as follows:

[0056] Flame retardancy: passed the VW-1 flame retardancy test;

[0057] Tensile strength: 44.9Mpa, elongation at break 375%;

[0058] The elongation at break after 250℃ / 168h high temperature aging is 288%;

[0059] 300℃±3℃ / 4h high temperature impact, no dripping, no cracking;

[0060]-55℃ / 4h low temperature impact without cracking;

[0061] The finished tube is elastic.

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Abstract

The invention relates to an elastic polyvinylidene fluoride heat-shrinkable sleeve which is composed of the following components in parts by weight: 85-95 parts of polyvinylidene fluoride plastic, 5-15 parts of fluororubber elastomer, 1-3 parts of antioxygen, 2-5 parts of assistant crosslinker, 3-8 parts of plasticizer, 0.5-2 parts of acid accepter and 2-5 parts of color master. The polyvinylidene fluoride plastic is one or two of the following matters: 1,2-difluoroethene homopolymer and 1,2-difluoroethene- hexafluoropropylene homopolymer. The fluororubber elastomer is one, two or more than two of the following matters: vinylidene fluoride and chlorotrifluor ethylene copolymer, vinylidene fluoride and hexafluoropropylene copolymer, vinylidene fluoride, tetrafluoroethylene and hexafluoropropylene terpolymer. According to the elastic polyvinylidene fluoride heat-shrinkable sleeve, such performances of fluoroplastic as wear resistance, mechanical damage resistance and the like are kept simultaneously, elasticity of the heat-shrinkable sleeve is improved, the elastic polyvinylidene fluoride heat-shrinkable sleeve has such specific performances of fluororubber as oil resistance simultaneously, application scope of the fluoride heat-shrinkable sleeve is broadened and risk in the process of use is reduced.

Description

technical field [0001] The invention relates to an elastic polyvinylidene fluoride heat-shrinkable sleeve and a preparation method thereof. Background technique [0002] Polyvinylidene fluoride heat shrinkable tube has good flame retardancy and extremely low smoke value, extremely durable, wear-resistant and mechanical damage-resistant performance, especially suitable for those that may have corrosive air, thermal cycle, or mechanical stress unfavorable environment. Its softness, light weight and resistance to chemicals, heat, corrosion and UV light are also used in automobiles, avionics, boats, fluid sensing, instrument wiring, public transportation signals, communications and system controls, etc. occasion. [0003] However, due to the material of the fluoroplastic heat-shrinkable tube itself, it shrinks to the wiring harness and pipeline to increase the overall hardness. At the same time, there is a risk of whitening and cracking after too many times of bending. Therefo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/16C08L27/20C08K13/02C08K5/13C08K5/18C08K5/378C08K5/3492C08K3/26C08K3/22C08J3/28C08J3/24
Inventor 秦立福麦家星邱光南李可涛刘晓播
Owner CHANGYUAN ELECTRONICS DONGGUAN
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