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Safe self-controlled temperature type heat tracing cable

A heating cable, self-temperature control technology, applied in the direction of the heating element shape, etc., can solve the problems of poor performance stability, low PTC strength, etc., to achieve the effect of improved conductivity, improved efficiency, and good wear resistance

Inactive Publication Date: 2016-09-07
ANBANG ELECTRICAL GRP
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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 safe self-temperature-controlling heating cable, comprising a PTC core strip, which is sequentially covered 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 heat The 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, carboxylated nitrile latex 10, EPDM rubber 33, gallium indium tin Alloy 6, silicon masterbatch 7, diatomite 7, cationic polyacrylamide 3, carboxymethyl cellulose 2, magnesium oleate 2, titanium boride 6, low molecular weight polybutene 10, high density polyethylene 44, Appropriate amount of ionized water.

[0013] The safe self-control temperature heating cable is prepared by the following specific steps:

[0014] (1) Add diatomaceous earth to 7 times the amount of deionized water, ultrasonically stir to disperse into a s...

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Abstract

The invention discloses a safe self-controlled temperature type heat tracing cable which comprises a PTC core belt, an insulating layer, a metal shielding layer and a wear-resistant sheath layer, wherein the insulating layer, the metal shielding layer and the wear-resistant sheath layer covers the PTC core belt in sequence; the PTC core belt consists of two heating leads arranged in parallel and a PTC material layer covering each heating lead; diatomite is modified through cationic polyacrylamide so as to be positively charged and have good compatibility, electrical conductivity and mechanical property of improving a matrix material. The cable prepared by the invention is excellent in electrical property, good in heat resistance, aging resistance and wear resistance, small in swelling deformation, low in smoke, retardant in flame, environmentally friendly, safe and worthy of being popularized.

Description

technical field [0001] The invention relates to the technical field of cable materials, in particular to a safe self-controlling heat tracing cable. 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 changes within a certain temperatur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08L23/16C08L23/12C08L13/02C08L23/20C08K13/06C08K9/04C08K3/36C08K3/08C08K5/098C08K3/38H05B3/56
CPCC08K2201/001C08L23/06C08L2201/02C08L2201/08C08L2203/202C08L2205/02C08L2205/035C08L2207/062H05B3/56C08L23/16C08L23/12C08L13/02C08L23/20C08K13/06C08K9/04C08K3/36C08K3/08C08K5/098C08K3/38
Inventor 李贻连卜基峰姚月凤陈更芬
Owner ANBANG ELECTRICAL GRP
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