A production method of capacitor aluminum-plastic film and aluminum electrolytic capacitor formation foil

By employing multi-stage electrolytic oxidation and calcination processes, combined with nanomaterials and specific additives, the problem of insufficient oxide film thickness and density in traditional electrolytic foil production has been solved. This has improved the voltage withstand performance and specific capacitance of capacitors, reduced leakage current, and enabled the production of high-performance capacitors that are efficient and environmentally friendly.

CN119964991BActive Publication Date: 2025-10-24XINJIANG FENGCHUAN ELECTRONIC TECH CO LTD +2
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Patent Information

Application Number
CN202510346529.7
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2025-03-24
Publication Date
2025-10-24
Estimated Expiration
2045-03-24

AI Technical Summary

Technical Problem

Traditional electrolytic capacitor foil production methods have shortcomings in terms of oxide film thickness, density, and uniformity, resulting in limited voltage withstand and capacitance performance of capacitors. Furthermore, they have low production efficiency, high environmental control requirements, and are difficult to meet the demands of modern industry for high-performance capacitors.

Method used

By employing multi-stage electrolytic oxidation treatment, combined with nanomaterials and specific additives, and through optimization of various solution systems and electrolysis parameters, the thickness and density of the oxide film are gradually improved, and the performance of the electrolytic foil is enhanced through calcination and post-treatment.

Benefits of technology

It significantly improves the withstand voltage and specific capacitance of the electroformed foil, reduces leakage current, meets the stability requirements of capacitors under high frequency, high temperature and high humidity conditions, and at the same time reduces production costs and environmental impact.

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Abstract

The application provides a production method of an aluminum-plastic film and an aluminum electrolytic capacitor formation foil, relates to the field of formation foil production, and is characterized by an aluminum-plastic film structure and a preparation process of the formation foil. The aluminum-plastic film comprises, from inside to outside, an aluminum electrolytic capacitor formation foil, a bonding layer and a heat-sealing layer. The bonding layer is composed of maleic anhydride modified polyolefin, diisocyanate and glycidyl ether type epoxy resin, and the heat-sealing layer is composed of polypropylene and polyphenylene sulfide. The production of the formation foil is realized through multi-stage electrolytic oxidation and optimized combination of various additives, so that the thickness and compactness of the oxidation film are gradually improved, the voltage resistance, specific capacity and mechanical strength of the formation foil are significantly improved, and the leakage current is reduced.
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