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Manufacturing method of improved high temperature polymer PTC beat-sensitive resistor

A thermistor, high temperature technology, applied in the direction of resistors with positive temperature coefficient, etc., can solve the problems of resistance value increase, affecting use, etc., to reduce the increase of resistance value, improve temperature resistance grade and processing performance , improve the effect of recovery

Active Publication Date: 2011-05-18
SHANGHAI CHANGYUAN WAYON CIRCUIT PROTECTION CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, such products are in the protection state after repeated actions, especially for a long time. After the fault is eliminated, the resistance value will have a large increase in resistance compared with that before protection, which seriously affects its use.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0017] Table 1

[0018] materials

[0019] Note: Polyvinylidene fluoride: Shanghai Sanaifu New Materials Co., Ltd. FR901

[0020] Carbon black: Degussa HB150

[0021] PTFE powder: (A) is 3M Dyneon TF9205PTFE

[0022] (B) Produce FR002A for Shanghai Sanaifu New Material Co., Ltd.

[0023] Stir the components in Table 1 in a high-speed mixer for 15 minutes, place them in an internal mixer at a temperature of 230°C and knead them evenly, sandwich them between two layers of nickel-plated copper foil, place them in a die, press 10Mpa, pressed to an area of ​​200cm at a temperature of 230°C 2 , Thick 0.35mm sheet. After heat treatment at 150°C in a vacuum oven for 16 hours, irradiate with electron beams at a dose of 10Mrad, and then use a punch to make small pieces with a size of 10mm*14mm, solder 0.8mm copper wires on both sides, and finally wrap a A layer of epoxy resin can be made into a polymer PTC thermistor with a zero power resistance of 42...

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PUM

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Abstract

This invention relates to a manufacturing method for an improved high temperature macromolecule PTC thermistor composed of a core, metallic foils adhered to both sides of the core, a lead out electrode welded on the outer surface of the foil and an insulation layer covering the outside, in which, said core is pressed by a powder conduction macromolecule material mixed by a macromolecule polymer, carbon black, carbon black dispersant and other processed aids in the following weight percentage: macromolecule polymer: 35-60%, carbon black:35-55%, Teflon powder: 0.5-20% and aids: 0.1-10%, in which, said macromolecule polymer is: PVDF, soluble Teflon, ethane and TFE multi-polymers, nylon, perfluoro-ethane and propene, ethane TFCE or their multi-polymer or their mixture.

Description

Technical field [0001] The manufacturing method of the improved high-temperature polymer PTC thermistor of the present invention relates to a manufacturing method of a thermistor with conductive polymer composite material as the main raw material, thereby relating to a polymer with high transition temperature Methods of resistance stability of PTC thermistors. Background technique [0002] Generally, a positive temperature coefficient (PTC) phenomenon can be exhibited in a crystalline or semi-crystalline polymer composite material filled with conductive particles. That is, at lower temperatures, such conductors exhibit low resistivity, and when the temperature rises above the melting point of its polymer, which is the so-called "shutoff" temperature, the resistivity rises sharply. high. Current conventional polymer materials include polyethylene, polypropylene, polystyrene, EVA, EAA, EBA, and conductive fillers include carbon black, graphite, carbon fiber, nickel powder, c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01C7/02
Inventor 刘锋侯李明王军刘正军王勇吴国臣
Owner SHANGHAI CHANGYUAN WAYON CIRCUIT PROTECTION CO LTD