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Self-limiting temperature cable material with good weather fastness

A technology of self-limiting temperature and weather resistance, applied in the direction of heating element material, heating element shape, etc., can solve the problems of low strength and poor performance stability of PTC, and achieve the effect of low cost, good weather resistance and perfect conductive network

Inactive Publication Date: 2016-12-07
安徽吉安特种线缆制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the prior art, polymer-based PTC materials and polymer heating cables still have defects such as poor performance stability and low PTC strength.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0012] A self-limiting temperature cable material with good weather resistance, including a PTC core strip, which is sequentially coated with an insulating layer, a metal shielding layer and a wear-resistant sheath layer outside the PTC core strip. The PTC core strip is composed of two parallel arranged The heating wire is composed of a PTC material layer coated on the outside; the PTC material is prepared from the following raw materials in parts by weight (kg): polypropylene 30, tin-bismuth alloy powder 4, calcium stearate 0.2, conductive mica 11 , Carboxylated nitrile powder rubber 9, hardwood fiber 15, carboxymethyl cellulose 2, graphite 7, phosphorus-free gypsum powder 4.8, polyarylate 30, paraffin wax 2, polyolefin 42, deionized water in proper amount.

[0013] The self-limiting temperature cable material with good weather resistance is prepared by the following specific steps:

[0014] (1) Soak the hardwood fibers in deionized water and use a beater to decompose and bea...

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Abstract

The invention discloses a self-limiting temperature cable material with good weather fastness. The self-limiting temperature cable material comprises a PTC core belt as well as an insulation layer, a metal shielding layer and a wear-resisting sheath layer, which are coated outside the PTC core belt in sequence, wherein the PTC core belt consists of two parallel heating conductors and PTC material layers coated outside the heating conductors. Through material proportioning of adopted raw materials, the electric resistivity of the product surface is reduced, so that the conducting efficiency of filling is strengthened; and the self-limiting temperature cable material is simple in preparation process and low in cost, has favorable weather fastness and high temperature resistance, and deserves popularization.

Description

technical field [0001] The invention relates to the technical field of cable materials, in particular to a self-limiting temperature cable material with good weather resistance. Background technique [0002] Heat tracing cables are widely used in many fields. For example, in industry, they are mainly used in petroleum, chemical, thermal power plants and other places where liquid substances in pipelines or tanks need to be prevented from solidifying / slow flow. In public facilities, they are mainly used as companions for fire-fighting pipelines. It can be used for indoor heating and anti-freezing of outdoor pipes in winter in civil applications. The core of the heating cable lies in its structure and the PTC material for making its electric heating element. PTC material refers to a heat-sensitive material whose resistance value increases with the increase of temperature, that is, the resistance or resistivity of the material remains basically unchanged or only slightly change...

Claims

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Application Information

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IPC IPC(8): H05B3/56H05B3/10
CPCH05B3/10H05B3/56
Inventor 荔建荣董文锋洪生华吴永志
Owner 安徽吉安特种线缆制造有限公司
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