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High-temperature PTC (Positive Temperature Coefficient) self temperature limitation heat tracing belt and preparation method thereof

A technology of self-limiting temperature heating cables and heating cables, applied in the shape of heating elements, etc., can solve the problems of expensive fluorine-containing materials, unfavorable use of high-temperature heating cables, environmental pollution, etc., and achieve low cost, good heat and cold resistance performance, improve the effect of thermal performance

Inactive Publication Date: 2018-11-06
ANHUI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The base materials of high-temperature heating cables all contain fluorine, which will cause serious pollution to the environment after being discarded, and the fluorine-containing materials are expensive, which is not conducive to the widespread use of high-temperature heating cables in civilian fields

Method used

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  • High-temperature PTC (Positive Temperature Coefficient) self temperature limitation heat tracing belt and preparation method thereof
  • High-temperature PTC (Positive Temperature Coefficient) self temperature limitation heat tracing belt and preparation method thereof
  • High-temperature PTC (Positive Temperature Coefficient) self temperature limitation heat tracing belt and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0026] In this embodiment, the heating cable includes the following ingredients in parts by weight: 1270 parts of matrix HDPE, 37 parts of coupling agent, 284 parts of melting inhibitor, and 257 parts of reinforcing material.

[0027] The preparation method of the high-temperature PTC self-limiting temperature heating cable in this embodiment, the specific steps are as follows:

[0028] 1) Weigh 37 parts by weight of coupling agent vinyltriethoxysilane, 284 parts by weight of 98% purity, particle size distribution 0.5 μm, specific surface area 5m 3 / g ultra-fine magnesium hydroxide anti-melting agent and 257 parts by weight of E-glass fibers are placed in a plastic refining machine, and the temperature of the roller of the plastic refining machine is raised to 180 ° C. Add 1270 parts by weight of matrix material HDPE-7000F, and wait After the roll, add 62 parts by weight of carbon black, after mixing evenly, extrude into a thin sheet with a thickness of 2mm, and cut it into a ...

Embodiment 2

[0032] This example is the same as Example 1, except that the heating cable in this example includes the following ingredients in parts by weight: 1310 parts of matrix HDPE, 74 parts of coupling agent, 250 parts of anti-melting agent, and 257 parts of reinforcing material.

[0033] After 30 minutes, it was measured that the starting current was 0.31A, and the heating temperature was 125°C.

Embodiment 3

[0035] This example is the same as Example 1, except that the heating cable in this example includes the following ingredients in parts by weight: 1325 parts of matrix HDPE, 53 parts of coupling agent, 237 parts of anti-melting agent, and 240 parts of reinforcing material.

[0036] After 30 minutes, it was measured that the starting current was 0.48A, and the heating temperature was 163°C.

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Abstract

The invention discloses a high-temperature PTC (Positive Temperature Coefficient) self temperature limitation heat tracing belt and a preparation method thereof, and relates to the technical field ofPTC composite materials. HDPE (High-Density Polyethylene) is used as a base body material; glass fiber for enhancing the heat tracing belt intensity and magnesium hydroxide particles for inhibiting melting are added; a method of combining melting blending with hot pressing shaping and cold pressing shaping is used for preparing the heat tracing belt. The heat tracing belt prepared by the method does not contain fluorine; the raw material price is low; the preparation method is simple; the prepared heat tracing belt has the advantages of low cost and no pollution; through visual study and analysis, the obtained and prepared heat tracing belt has the 30 min starting current being 0.48 A; the highest heating temperature is 163 DEG C; the characteristic of high heating temperature is realized;the heat tracing belt can be widely applied to the aspects of petroleum, chemical engineering and the like.

Description

technical field [0001] The invention belongs to the technical field of PTC composite materials, and in particular relates to a high-temperature PTC self-limiting temperature heating cable and a preparation method thereof. Background technique [0002] PTC (Positive Temperature Coefficient) positive temperature coefficient thermistor is a temperature-sensitive semiconductor resistance material, which has the characteristic that the resistivity increases with the increase of temperature. PTC thermistor is also called "thermal switch". After the current passes through the element, the temperature rises, that is, the temperature of the heating element rises. When the Curie point temperature (Tc) is exceeded, the resistance increases, thereby limiting the current increase. Therefore, the decrease of the current leads to the decrease of the temperature of the component, the decrease of the resistance value increases the circuit current, the temperature of the component rises, and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08K9/06C08K7/14C08K3/22H05B3/54
CPCC08K3/22C08K7/14C08K9/06C08K2003/2224C08L2207/062H05B3/54C08L23/06
Inventor 孙益民高天铱刘茹甘星星孙红云陈丹丹
Owner ANHUI NORMAL UNIV
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