Sealing paste of metallized film capacitor

Abstract

The invention provides a sealing paste of a metallized film capacitor, which includes the following components, by weight, 40 to 60 parts of petroleum wax, 10 to 15 parts of polyisobutene, 20 to 30 parts of vaseline, 10 to 15 parts of mica powder, 10 to 15 parts of vermiculite powder, 10 to 15 parts of sulphur and 10 to 15 parts of attapulgite. The sealing paste of the metallized film capacitor has good toughness and plasticity, excellent electrical property and appropriate kinematic viscosity, and easily fills gaps of the metallized film capacitor.

Description

technical field [0001] The invention relates to the field of capacitor potting materials, in particular to an anti-metallization film capacitor potting paste. Background technique [0002] In the production of metallized film capacitors, the main dielectric and the pores between the plate and the main dielectric are usually potted with a material to improve capacitance and insulation performance, and improve partial discharge and heat resistance. Simply using commercial paraffin wax or microcrystalline wax has defects such as poor ductility and plasticity, which is easy to be brittle at low temperature and has large shrinkage. The use of oil has large loss and is easy to leak, which does not meet the requirements of current production plants. Existing patents introduce metallized film capacitor potting materials with oil as the main component, such as JP03035513 patent introduction using polybutene-alkylbenzene-cottonseed oil mixture potting, US 6,280,659 potting capacitors ...

AI Technical Summary

Problems solved by technology

Simply using commercial paraffin or microcrystalline wax has defects such as poor ductility and plasticity, which is easy to be brittle at low temperature and has relatively large shrinkage. The use of oil has large losses and is easy to leak, which does not meet the requirements of the current production plant.