Manufacturing method for high-voltage self-recovery fuse wire

Abstract

Disclosed is a manufacturing method for a high-voltage self-recovery fuse wire. The method is characterized in that a positive-temperature factor polymer composite material which is formed through polyethylene and carbon black pellets is placed on a conveyor belt to pass an electronic accelerator and then radiated by electron beams generated by the electronic accelerator, wherein the total radiation dose of the electron beams is 900-1100 KGY, the radiation energy is 2.7-3.2 Mev and the beam current is 8.9-10.1mA; the speed of the positive-temperature factor polymer composite material when passing the electron beams is 14.5-15.5 meters per minute and the passing total coil number is 95-105. The manufacturing method for the high-voltage self-recovery fuse wire adopts the electron beams generated by the electronic accelerator so that the method has unique advantages under a high-dose crosslinking application and provides a unit-time dose rate which far exceeds that of an isotope Gamma source; and the utilization rate of the radiation energy is high and no radiation is generated after operation of the electronic accelerator stops so that the method is significantly safe.

Description

technical field [0001] The invention relates to electronic components, in particular to a manufacturing method of a high-voltage resettable fuse. technical background [0002] PTC (Positive Temperature Coefficient), positive temperature coefficient polymer composite material, referred to as polymer, is a resettable fuse, made of specially treated polymer resin (Polymer) and conductive particles (Carbon Black) distributed inside composition. It has a unique positive temperature coefficient resistance characteristic, that is, within a certain temperature range, its own resistance will increase as the temperature rises. When the overcurrent occurs, the temperature of the polymer PTC rises, and the resistance rises sharply, which plays the role of overcurrent protection. When the overcurrent state is eliminated, the resistance of the polymer PTC returns to the normal state. [0003] Most of the resettable fuse products currently produced use cobalt-60 gamma rays for radiation...

AI Technical Summary

Problems solved by technology

[0003] Most of the resettable fuse products currently produced use cobalt-60 gamma rays for radiation cross-linking. 5-50Mrad electron beam radiation, but the radiation dose is relatively low, and the cobalt-60 gamma ray radiation cross-linked gel content is relatively low. The PTC products produced can only be used in low-voltage environments. The connection takes a long time, and the oxidation reaction involving oxygen in the air is inevitable

Under the condition of an oxygen-free environment without providing high vacuum, long-term irradiation makes the surface of the material oxidized seriously, and seriously affects the stability of the polymer.

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