Improved polymer PTC thermosensitive resistor and manufacturing method thereof

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 ...