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US 9,284,104 B2Granted
Deposition of ultra-thin inorganic oxide coatings on packaging
AssigneeFrito-Lay North America, Inc.
InventorsRobert Godfroid, Glenn Jordan, Anthony Robert Knoerzer, Kenneth Scott Laverdure, Eldridge M. Mount, III
Life of this patent
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Abstract
An apparatus and method for depositing an ultra-thin inorganic coating on to a packaging film substrate is disclosed. Flame pretreatment enhances the quality of the inorganic coating. Multiple coating layers may be deposited onto the substrate by passing the substrate over various one or more flame head configurations in either a stand-alone or in-line manufacturing environment.
Claims8
A method of coating a film substrate with at least one inorganic oxide layers comprising:
- pretreating said substrate by passing said substrate through at least one flame treatment flame head assembly supplied with no inorganic oxide precursor;
- after said pretreating step, depositing two or more inorganic oxide layers on said substrate by passing said substrate through two or more deposition flame heads on at least one deposition flame head assembly supplied with at least one inorganic oxide precursor, wherein
- said pretreating and depositing steps occur at open atmosphere;
- said depositing step is performed at a flame temperature that ranges from 650° C. to 1450° C.;
- said pretreatment step substantially enhances an atomic percentage of inorganic oxide in said inorganic oxide layers during said deposition step such that WVTR of said inorganic layers is <0.2 g/m2/day;
- and OTR of said inorganic layers is <20 cc/m2/day.
3 more elements
Dependencies are inferred from the claim text.