Sterilizible composite film for packaging purposes

Details Sterilizible composite film for packaging purposes Sterilizible composite film for packaging purposes

2005-04-12

2005-04-12

Mayes, Melvin C. (Department: 1734)

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

C156S278000, C156S279000, C428S216000, C428S451000

Reexamination Certificate

active

06878229

ABSTRACT:
A film composite for packaging purposes. The film composite efficiently blocks the passage of water vapor and gas after sterilization in a water bath or in water vapor at temperatures of more than 90° C., and is a film consisting of polyethylene terephthalate (PET) with a coextruded layer consisting of polyethylene-2,6-naphthalate (PEN) on at least one side. The film has a 10 nm to 200 nm thick ceramic layer on at least one of the sides that are coated with PEN. The layer is produced by simultaneously vaporizing silicon dioxide (SiO2) and metallic silicon in a vacuum. The layer consists of SiOx, x being a number between 0.9 and 2. The composite film blocks the passage of water vapor and gases to a large extent after sterilization in a water bath or in water vapor at temperatures of more than 90° C. A process for preparing the film composite.

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Abstract, Section Ch., Week 9325, Derwent Publications, Ltd., AN 93-201537.

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