Low-resistance type automatic-temperature-limited polymer heat tracing cable

A polymer, temperature tracing technology, applied in the direction of heating element material, heating element shape, etc., can solve the problems of low PTC strength and high low temperature resistivity, and achieve the effect of improving PTC strength, improving gelation, and improving PTC strength

Inactive Publication Date: 2015-04-29
ANBANG ELECTRICAL GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the prior art, polymer-based PTC materials and polymer heating cables still have defects such as high low-temperature resistivity and low PTC strength.

Method used

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  • Low-resistance type automatic-temperature-limited polymer heat tracing cable
  • Low-resistance type automatic-temperature-limited polymer heat tracing cable

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Embodiment Construction

[0019] Such as figure 1 as shown, figure 1 It is a structural schematic diagram of a low-resistance polymer self-limiting temperature tracing heating cable proposed by the present invention.

[0020] refer to figure 1 , a low-resistance polymer self-limiting temperature heating cable proposed by the present invention includes a flat strip-shaped PTC core strip, and the PTC core strip is composed of two heating wires 1 arranged in parallel and a PTC material layer coated on the outside 2, the PTC core tape is coated with an insulating layer 3, a metal shielding layer 4 and a wear-resistant sheath layer 5 in sequence; the PTC material is a polymer-based PTC composite material.

[0021] In one embodiment, the polymer-based PTC composite material is made of high-density polyethylene, carbon black, ethylene-methacrylate ionomer, polyester acrylic oligomer, carbon fiber, tetraerythritol fat, zinc oxide, peroxide Made of dicumyl, 2-methyl-1-(4-methylthiophenyl)-2-morpholine-1-prop...

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Abstract

The invention discloses a low-resistance type automatic-temperature-limited polymer heat tracing cable. A PTC (positive temperature coefficient) material adopts a polymer based PTC composite material, wherein high density polyethylene, ethylene- methacrylate ionomer and polyester acrylate oligomer at the weight ratio of (5:2:1)-(4:2:1) jointly form a polymer material matrix; the weight percentages of carbon black, carbon fiber, zinc oxide, tetra-pentaerythritol ester and dicumyl peroxide added to the polymer material matrix is 14%-17%, 6%-12%, 0.3%-0.6%, 0.06%-0.08% and 0.005%-0.01%, and the weight ratio of 2-methyl-1-(4-(methylthio)phenyl)-2-morpholine-1-propanon and carbon black is 0.05-0.2. According to the low-resistance type automatic-temperature-limited polymer heat tracing cable, performance of the heat tracing cable is optimized, the structure is simple, the low-temperature resistivity is low, and the PTC strength is high.

Description

technical field [0001] The invention relates to the technical field of heating cables, in particular to a low-resistance 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 (Positive Temperature Coefficient) material used to make 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 unch...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B3/56H05B3/10C08L23/06C08L23/08C08L67/06C08K13/04C08K3/04C08K7/06C08K3/22C08K5/10C08K5/14C08K5/378
Inventor 李贻连
Owner ANBANG ELECTRICAL GRP
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