Flexible polymer film with vapor impermeable coating

Details Flexible polymer film with vapor impermeable coating Flexible polymer film with vapor impermeable coating

B - Operations, Transporting

32

B

117/157, 117/225

B32B 27/06 (2006.01) B65D 65/40 (2006.01) C08J 7/06 (2006.01)

Patent

CA 1209414

-39- ABSTRACT OF THE DISCLOSURE Flexible polymer packaging films having thin films of inor- ganic coatings deposited thereon to reduce the vapor perme- ability of the article. Inorganic thin film coatings com- prising a composite of two materials are disclosed to confer both substantial transparency and retortability on the over- all packaging film structure. The two material film com- posite involves either sequentially deposited films with the first thin film layer serving as an adhesion layer and the second thin film layer serving as a barrier layer. Alterna- tively, the two materials may be co-deposited to form a single thin film layer which provides sufficient adhesion to confer retortability on the overall film structure and also functions as relatively impermeable gas and vapor barrier for reducing the vapor transmission rate through the product. Various coated single film articles and dual film laminated articles are disclosed.

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