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Self-temperature-limiting electric tracing band with positive temperature coefficient and preparation method of self-temperature-limiting electric tracing band

A positive temperature coefficient, electric heating cable technology, applied in the direction of heating element shape, heating element material, etc., can solve the problems of inability to produce self-limiting electric heating cable, low conductive filler content, etc., to achieve excellent heating performance and high PTC strength. , the effect of high tensile strength

Active Publication Date: 2022-07-22
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a self-regulating heating cable with a positive temperature coefficient to solve the problem that qualified self-limiting temperature heating cables cannot be produced in the field of electric heating blankets that have extremely high requirements on flexibility and bending performance. Heat tracing cable and its preparation method, which uses a single polymer material as the matrix and has a low content of conductive filler. After the cable is extruded into a line, static high-temperature heat treatment and electrical treatment are used to promote the directional movement and agglomeration of the conductive filler, and precise control The distribution state of the filler builds a locally concentrated conductive network, which solves the above problems

Method used

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  • Self-temperature-limiting electric tracing band with positive temperature coefficient and preparation method of self-temperature-limiting electric tracing band
  • Self-temperature-limiting electric tracing band with positive temperature coefficient and preparation method of self-temperature-limiting electric tracing band
  • Self-temperature-limiting electric tracing band with positive temperature coefficient and preparation method of self-temperature-limiting electric tracing band

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Embodiment 1

[0044]At present, in the field of electric blankets that require extremely high flexibility and bending performance, it is still impossible to produce qualified self-limiting temperature electric heating cables. Therefore, how to effectively build a conductive network and form macroscopically uniform but localized electric heating cables during the processing of electric heating cables. The concentrated distribution of fillers has important practical application value for improving the processing fluidity, PTC strength and mechanical properties of the self-limiting temperature electric heating cable.

[0045] In view of the above problems, this embodiment provides a self-limiting temperature electric heating cable with a positive temperature coefficient, which adopts a single polymer material as the matrix and has a low content of conductive fillers, and has excellent processing fluidity, heat generation performance and mechanical performance. , can be widely used in tanks, pip...

Embodiment 2

[0053] Embodiment 2 For the self-limiting temperature electric heating cable with a positive temperature coefficient in the first embodiment, a preparation method for a self-limiting temperature electric heating cable with a positive temperature coefficient is proposed, please refer to Figure 1-3 , including the following steps:

[0054] Step S1: The conductive filler, the radiation cross-linking sensitizer and the heating tape base material are mixed uniformly to form PTC conductive composite material particles; specifically, the detailed steps of the step S1 are: After mixing the sensitizer and the heating tape base material evenly, the twin-screw extruder is melted, extruded and granulated to obtain PTC conductive composite material particles; preferably, the extrusion temperature of the twin-screw extruder is 160°C- 230℃;

[0055] In this embodiment, specifically, the mass percentage content of the conductive filler in the step S1 is 5-15%, the mass percentage content of...

Embodiment 3

[0068] In the third embodiment, three groups of experimental parameters and realization data are given to further illustrate the advantages of the electric heating cable in the present invention.

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Abstract

The invention discloses a self-temperature-limiting electric tracing band with a positive temperature coefficient and a preparation method thereof, and relates to the technical field of tracing band preparation, the self-temperature-limiting electric tracing band comprises a wire, the wire is coated with a heat conduction material, and the heat conduction material is sequentially provided with a first insulating layer, a shielding layer and a second insulating layer; the heat conduction material is composed of, by mass, 5-15% of a conductive filler, 1-5% of a sensitizer and a heat tracing band base material. According to the invention, a single high polymer material is adopted as a heat tracing band base material, and the content of conductive filler is low, so that the heat tracing band has excellent bending resistance, high tensile strength and high PTC strength; in the preparation process, after the electric tracing band is extruded into a line, static high-temperature heat treatment and electric treatment are utilized to promote directional movement and agglomeration of the conductive filler, the distribution state of the filler is accurately regulated and controlled, a locally concentrated conductive network is constructed, and the electric tracing band has excellent processing fluidity, mechanical property and heating performance; the method can be widely applied to the fields of various tank bodies, pipeline heat preservation, electric blankets and the like.

Description

technical field [0001] The invention relates to the technical field of the preparation of tracing cables, in particular to a self-limiting temperature electric tracing cable with a positive temperature coefficient and a preparation method thereof. Background technique [0002] The self-limiting temperature electric heating material with PTC effect is a conductive composite material with thermal switch characteristics, which can automatically adjust the output power according to the ambient temperature, without the risk of high temperature overheating and self-burning, and is the best electric heating cable in the world today. It is widely used in antifreeze protection and process temperature maintenance of various pipes and tanks. PTC materials are usually divided into ceramic PTC and polymer-based PTC. Among them, polymer-based PTC materials have become the most widely used electric heating cables due to their excellent processing and use properties. [0003] In the PTC el...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B3/10H05B3/12H05B3/56C08L23/06C08L23/12C08L23/20C08L27/16C08L33/12C08L67/02C08L75/04C08K3/04C08K3/22
CPCH05B3/10H05B3/12H05B3/56C08K3/04C08K3/041C08K3/22C08K2201/011H05B2203/017H05B2203/02C08L23/06C08L23/12C08L23/20C08L27/16C08L33/12C08L67/02C08L75/04
Inventor 吴桐向明杨帆王浪浪李波伍焱明杨添淏
Owner SICHUAN UNIV
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