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US 5,688,556 AGranted
Barrier films having vapor coated EVOH surfaces
AssigneeMobil Oil Corporation
InventorJohn R. Wagner, Jr.
Life of this patent
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Abstract
A method of producing a multilayer polymeric film is accomplished through the vapor deposition of a barrier coating onto an ethylene vinyl alcohol copolymer layer, which is adhered to a polymeric substrate. A multilayer polymeric film exhibiting barrier characteristics is also accomplished through the use of an ethylene vinyl alcohol copolymer layer between a vapor deposited barrier coating and a polymeric substrate.
Claims13
A method for producing a polymeric film having barrier characteristics, which comprises:
- vapor depositing a barrier coating on an exposed surface of an ethylene vinyl alcohol copolymer layer, wherein said ethylene vinyl alcohol copolymer layer is adhered to a polymeric substrate.
A method for increasing the production rate of a polymeric film having barrier characteristics, which comprises:
- adhering an ethylene vinyl alcohol copolymer layer to a polymeric substrate, thereby providing a surface of said ethylene vinyl alcohol copolymer layer exposed for receipt of a barrier coating;
- and thereafter,
- vapor depositing said barrier coating on said exposed surface of said ethylene vinyl alcohol copolymer layer.
Dependencies are inferred from the claim text.