Foamed sheath for foamed FEP (fluorinated ethylene propylene) cables and preparation method thereof

A sheath and cable technology, applied in the field of wire and cable, can solve the problems of easy rupture of foamed melt, unstable electrical performance, unstable wire diameter, etc., to reduce the possibility of melt fracture, improve the performance of the sheath, and reduce attenuation Effect

Inactive Publication Date: 2016-03-30
GANZHOU JINXINNUO CABLE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the shortcomings of the existing foamed FEP cables, the foamed outer sheath foamed melt is easy to break, the surface is rough, the wire diameter is unstable, and the electrical performance is unstable. The technical problem to be solved by the present invention is to provide The stability of the wire diameter of the cable provides a stable melt environment for the insulating foaming melt and reduces the possibility of melt rupture, so as to increase the foaming degree of the insulator, reduce the attenuation of the cable, and reduce the occurrence of the return loss of the cable. Foam skin and preparation method thereof

Method used

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  • Foamed sheath for foamed FEP (fluorinated ethylene propylene) cables and preparation method thereof
  • Foamed sheath for foamed FEP (fluorinated ethylene propylene) cables and preparation method thereof
  • Foamed sheath for foamed FEP (fluorinated ethylene propylene) cables and preparation method thereof

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Embodiment 1-4

[0022] The preparation method of the foamed sheath of foamed FEP cable, the method may further comprise the steps:

[0023] (1) prepare materials according to the components and content listed in the examples in Table 1;

[0024] ⑵Put the raw materials into the high-speed mixer according to the ratio, mix at a high speed of 1800-2500rpm, and mix for 3-5 minutes;

[0025] ⑶ Low speed 400-800rpm discharge;

[0026] ⑷Put the mixed raw materials into the fluoroplastic extruder, the extruding temperature is 360-380°C, and evenly adhere to the outside of the foam layer after being extruded by this machine.

[0027] The formula table (unit: gram) of the formula table of table 1 embodiment 1-4

[0028]

[0029]

[0030] Related substance parameters in Table 1:

[0031] High melting fat FEP1, the melting index is 35g / 10min; high melting fat FEP2, the melting index is 30g / 10min; high melting fat FEP3, the melting index is 38g / 10min;

[0032] Low melting fat FEP1, the melting i...

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Abstract

The invention relates to a foamed sheath for foamed FEP (fluorinated ethylene propylene) cables and a preparation method thereof. The foamed sheath for foamed FEP cables comprises the following components in percentage by weight: 15-25% of high-melt-index FEP, 5-8% of low-melt-index FEP, 2-3% of foaming agent, 25-40% of nitrile-butadiene rubber, 12-18% of polyacrylate, 10-20% of composite antioxidant, 1.5-2% of silicon dioxide powder, 0.5-1.5% of calcium carbonate and 0.2-0.5% of rare-earth oxide. The invention also relates to a preparation method of the foamed sheath. Compared with the prior art, the high-melt-index and low-melt-index mixture is adopted to enhance the toughness and foaming degree of the foamed sheath and lower the possibility of melt fracture. Certain amounts of calcium carbonate and silicon dioxide powder are added into the materials to improve the properties of the sheath and lower the cable attenuation and cable echo loss.

Description

technical field [0001] The invention belongs to the technical field of electric wires and cables, and in particular relates to a foamed sheath of a foamed FEP cable and a preparation method thereof. Background technique [0002] Due to the fire protection requirements of modern buildings, high-temperature fire-resistant cables have a good development prospect. At present, materials that can be used as insulation for coaxial radio frequency cables and have a temperature resistance above 200°C generally include perfluoroethylene propylene (FEP), polytetrafluoroethylene, etc. Ethylene, foamed FEP, and expanded PTFE. Foamed FEP is that some gases exist in polytetrafluoroethylene in the form of cells, and it has become a popular fluorine-containing cable in the market due to its advantages in low loss, high power and price. [0003] The foamed sheath of the traditional foamed FEP cable has high manufacturing cost, low production efficiency, and complicated process. The FEP foame...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L9/02C08L27/18C08L33/04C08K13/02C08K5/134C08K3/36C08K3/26C08K3/22C08J9/04
CPCC08L9/02C08J9/04C08J2309/02C08J2427/18C08L2203/14C08L2203/202C08L2205/025C08L2205/035C08L27/18C08L33/04C08K13/02C08K5/1345C08K3/36C08K2003/265C08K2003/221
Inventor 桂礼伟桂宏兵刘媛
Owner GANZHOU JINXINNUO CABLE TECH
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