Adhesive bonding and miscellaneous chemical manufacture – Methods – Surface bonding and/or assembly therefor
Patent
1989-02-03
1992-03-24
Bueker, Richard
Adhesive bonding and miscellaneous chemical manufacture
Methods
Surface bonding and/or assembly therefor
156151, 156233, 156240, 205 77, C25D 500
Patent
active
050984950
ABSTRACT:
A process for coating a packaging film with a transparent barrier coating. The process starts with a metal substrate made of, or having a surface coating of, a valve metal or valve metal alloy. The metal substrate is anodized to form an anodic film of the valve metal on the metal substrate. The anodic film is made readily detachable from the metal by carrying out the anodization step in the presence of an adhesion-reducing agent, e.g. a fluoride. The packaging film is then attached to the anodic film and the anodic film is detached from the metal. The transferred anodic film forms a thin dense oxide coating on the packaging film that acts as a barrier against oxygen and moisture transport. The invention can be used for making packaging films suitable for packaging foodstuffs, and the like.
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DeFerrari Howard F.
Rosenfeld Aron M.
Smits Paul
Alcan International Limited
Bueker Richard
Engel, Jr. James J.
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