Improved polymer PTC thermosensitive resistor and manufacturing method thereof

A technology of thermistor and manufacturing method, applied in the direction of resistors with positive temperature coefficient, etc., can solve the problems of insufficient withstand voltage level, ignition or burning, hidden dangers of communication, etc., and achieve the effect of high withstand voltage level

Active Publication Date: 2005-06-08
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, at present, the polymer PTC material has insufficient withstand voltage level, and it is prone to ignition or burning, which brings potential hidden dangers to communication.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0011] After melting and mixing high molecular polymer, conductive filler, inorganic non-conductive filler and various additives through the mixing equipment internal mixer and open mill to form a core material, the metal electrode sheet is compounded on both sides of the core material by a press. After heat treatment at 80°C in a vacuum oven for 16 hours, the γ-ray (Co 60 ) irradiation with a dose of 20Mrad, and then punched into small pieces with a size of 5.5mm*5.5mm with a punch, immersed in KHK-1 electronic grade silica gel (Beijing Kehua New Material Technology Co., Ltd.) to coat the film, and cured at 180°C for 4 A polymer PTC thermistor with a zero power resistance of 10Ω at room temperature can be made after one hour.

[0012] The product made by the method of the present invention can withstand a voltage of 300 volts under the condition of 10 amperes of current.

example 2

[0014] After melting and mixing high molecular polymer, conductive filler, inorganic non-conductive filler and various additives through the mixing equipment internal mixer and open mill to form a core material, the metal electrode sheet is compounded on both sides of the core material by a press. After heat treatment at 80°C in a vacuum oven for 16 hours, the γ-ray (Co 60 ) radiation, the dose is 20Mrad, and then punched into small pieces of 5.5mm*5.5mm size with a punch, coated with EVA hot melt adhesive (Hangzhou Tianchuang Chemical Technology Co., Ltd., TH-402A type), cooled to room temperature, A polymer PTC thermistor with a zero power resistance of 9Ω at room temperature was prepared.

[0015] The product prepared by the method of the present invention can withstand a voltage of 320 volts under the condition of 10 ampere current.

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PUM

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Abstract

The invention relates to a improved macromolecule PTC thermistor and its manufacturing method. The manufacturing method is that the high polymer, conductive filler, inorganic non-conductive filler, and various auxiliary agents are melted and mixed to form core material by milling device banbury mixer and blender mill; the metal electrode sheet is compounded to the two sides of the core material by press; the composite sheet material is irradiated by the GAMA-ray or electron, its dosage is from 5Mad to 100Mad; then the sheet material is incised into chip with certain size, dipped into the coating liquid, solidify or cooled. After this the high polymer PTC thermistor is made. The invention PTC is made the surface of the material isolate from the air by the coating isolation layer. Thus with high of high voltage resistant.

Description

Technical field [0001] The invention relates to an improved polymer PTC thermistor and a manufacturing method thereof, which relate to an electronic component whose main raw material is a conductive polymer composite material and a manufacturing method thereof. Background technique [0002] Crystalline or semi-crystalline polymer composites filled with conductive particles can exhibit a positive temperature coefficient (PTC) phenomenon. That is to say, within a certain temperature range, its own resistivity will increase with the increase of temperature. These crystalline or semicrystalline polymers include polyethylene, polypropylene, polyvinylidene fluoride, polychlorotrifluoroethylene, and copolymers thereof. The conductive particles include carbon black, graphite, carbon fiber, and metal powder, wherein the metal powder includes, for example, silver powder, copper powder, aluminum powder, nickel powder, stainless steel powder, and the like. At lower temperatures, such ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01C7/02
Inventor 王勇侯李明王军
Owner SHANGHAI CHANGYUAN WAYON CIRCUIT PROTECTION CO LTD
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