Zinc-metallized base material for metallized capacitor and process for its production
AssigneeHonshu Seishi Kabushiki Kaisha
InventorsSusumu Nagai, Takamasa Ibaraki, Hisatoshi Kamotani, Tsunetatsu Yamauchi, Makoto Imai
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Abstract
A zinc-metallized base material for metallized capacitors and a process for its production in which a vacuum-deposited zinc layer being formed on at least one side of a base material composed of film or thin capacitor paper, and a surface protective layer composed of a substance which shows a predetermined vapor pressure at a predetermined temperature being provided thereon in a predetermined thickness to thereby improve the humidity resistance of the vacuum-deposited zinc layer.
Claims6
A zinc-metallized base material for metallized capacitors comprising:
- a base material composed of film or thin capacitor paper;
- a vacuum-deposited zinc layer formed on at least one surface of said base material;
- and
- a surface protective layer deposited on said vacuum-deposited zinc layer, said surface protective layer having a thickness of 7 to 500 .ANG. and consisting essentially of a material having a vapor pressure of 0.1 mmHg at a temperature in the range of 150.degree. to 290.degree. C. and being effective to improve the humidity resistance of said zinc layer.
A process for producing said zinc-metallized base material for metallized capacitors comprising the steps of:
- vacuum depositing a zinc layer on at least one surface of a base material composed of film or thin capacitor paper in a vacuum-depositing apparatus;
- and
- vacuum-depositing a surface protective layer on said vacuum-deposited zinc layer in the same vacuum-depositing apparatus, said surface protective layer having a thickness of 7 to 500 .ANG. and being composed of a material having a vapor pressure of 0.1 mmHg at a temperature in the range of 150.degree. to 290.degree. C. and selected from the group consisting of dimethylsilicone oil, silicone oils for vacuum pumps, fatty acids, salts of fatty acids and paraffin wax.
Dependencies are inferred from the claim text.