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Flame-retardant polymer automatic-temperature-controlling and heat-tracing cable

A polymer, warm heat tracing technology, applied in the direction of heating element material, heating element shape, etc., can solve the problems of low PTC strength and poor performance stability, and achieve improved PTC strength, low smoke and halogen-free environmental protection, and solve phase problems. Poor Tolerance Effects

Inactive Publication Date: 2016-09-21
ANHUI HEXIN TECH DEV
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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

[0013] A flame-retardant polymer self-limiting temperature heating cable, 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 heating wires and a PTC material layer coated on the outside; the PTC material is prepared from the following raw materials in parts by weight (kg): graphene oxide 9, polyaniline 4, hydrazine hydrate 0.3, polypropylene 30, Tin-bismuth alloy powder 4-6, zinc stearate 0.2, carbon nanotube 13, carboxylated nitrile powder rubber 9, polymethacrylate 10, carbon fiber 5, N,N-dimethylformamide 20, deionized water Appropriate amount.

[0014] The flame-retardant polymer self-limiting temperature heating cable is prepared by the following specific steps:

[0015] (1) Add graphene oxide to deionized water to make a 1mg / ml solution, stir it evenly, add polyaniline to continue ultrasonic dispers...

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Abstract

The invention discloses a flame-retardant polymer automatic-temperature-controlling and heat-tracing cable. The cable comprises a PTC core band, and an insulating layer, a metal shielding layer and a durable sheath layer which are arranged on the exterior of the PTC core band in a coating manner in sequence, wherein the PTC core band comprises two heating wires in parallel arrangement and a PTC material layer which coats the exteriors of the two heating wires in parallel arrangement. The cable prepared by the invention is simple in structure, low-smoke and zero-halogen and high in environment-friendliness, overcomes the shortcomings of relatively high weight, relatively high resistance, low conductivity, bad safety performance and the like of the cable in the prior art, and is worthy of popularization.

Description

technical field [0001] The invention relates to the technical field of cable materials, in particular to a flame-retardant polymer self-limiting temperature heating 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 with...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B3/56H05B3/12
CPCH05B3/12H05B3/56
Inventor 孙剑周强刘畅
Owner ANHUI HEXIN TECH DEV
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