Capacitor film containing modified bentonite and preparation method thereof

Abstract

The invention discloses a capacitor film containing modified bentonite and a preparation method thereof. The capacitor film comprises the following raw materials, by weight: 50-55 parts of metallocene linear low-density polyethylene resin, 25-30 parts of metallocene polypropylene resin, 10-15 parts of homo-polypropylene, 3-5 parts of epoxy linseed oil, 2-3 parts of polyving akohol, 1-2 parts of aluminum hydroxide, 1-2 parts of polyisobutylene, 8-12 parts of diatomite, 1-2 parts of ferrocene, 0.7-1.3 parts of poly-4-methy-l-pentene, 8-12 parts of modified bentonite, 0.9-1.1 parts of an antioxidant 1035, 0.6-0.8 part of phthalic acid polyester, 1-2 parts of epoxy octyl stearate, 4-6 parts of calcium stearate and 1.7-2.0 parts of modified wood ash. The preparation method provided by the invention is simple; addition of diatomite, modified attapulgite and modified wood ash enhances resistance and air tightness of the film; besides, the capacitor film has characteristics of good pressure resistance, impact resistance, high heat sealing strength and good heat sealing performance.

Description

technical field [0001] The invention relates to a capacitor film material, in particular to a capacitor film containing modified bentonite and a preparation method thereof. Background technique [0002] Film capacitors use metal foil as an electrode, which is stacked with plastic films such as polyethylene, polypropylene, polystyrene or polycarbonate from both ends, and wound into a cylindrical capacitor; in all Among the plastic film capacitors, the characteristics of polypropylene (PP) capacitors and polystyrene (PS) capacitors are the most significant. Of course, the price of these two capacitors is also relatively high. The quality of the capacitor film directly affects the service life and product performance of the capacitor. The demand for films is large and there are many types. It is difficult to meet the requirements of the market by using a single raw material to produce films, but each raw material has its shortcomings, so the produced films are difficult to meet...

AI Technical Summary

Problems solved by technology

[0002] Film capacitors use metal foil as an electrode, which is stacked with plastic films such as polyethylene, polypropylene, polystyrene or polycarbonate from both ends, and wound into a cylindrical capacitor; in all Among the plastic film capacitors, the characteristics of polypropylene (PP) capacitors and polystyrene (PS) capacitors are the most significant. Of course, the price of these two capacitors is also relatively high. The quality of the capacitor film directly affects the service life and product performance of the capacitor. The demand for films is large and there are many types. It is difficult to meet the requirements of the market by using a single raw material to produce films, but each raw material has its own shortcomings, so the produced films are difficult to meet the needs of various situations