Thin film structures for and method of sealing to glass
AssigneeR.J. Reynolds Tobacco Company
InventorCHARLES RAY ASHCRAFT
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Abstract
A sealing film and a method of sealing the film to glass is disclosed. The film comprises a layer of ethylene vinyl alcohol (EVOH) or a laminate comprising an outermost ethylene vinyl alcohol (EVOH) layer for adhering to a glass surface, particularly the rim of a glass container, using heat and pressure. The laminate may include in addition to the EVOH layer an adhesive layer, polymeric layer, optional adhesive layer and stock layer. The film has excellent adhesive properties, is food safe and is suitable as a sealing material.
Claims21
A multi-layer film capable of sealing to glass upon application of heat and pressure comprising an outermost ethylene vinyl alcohol layer adapted to contact a glass surface and function as an adhesive layer to said glass, and at least one other layer bonded to the ethylene vinyl alcohol layer.
A method of sealing a film to a glass container comprising the steps of selecting a multi-layer film comprising an outermost ethylene vinyl alcohol layer and at least one other layer, applying said film to the container with the ethylene vinyl alcohol layer in contact with the glass surface of the container and applying heat and pressure to the multi-layer film to seal the film to the glass surface of the container.
A film capable of sealing to glass upon application of heat and pressure comprising an ethylene vinyl alcohol layer adapted to contact a glass surface and function as an adhesive layer to said glass.
A method of sealing a film to a glass container comprising the steps of selecting a film comprising an ethylene vinyl alcohol layer, applying said film to the container with the ethylene vinyl alcohol layer in contact with the glass surface of the container and applying heat and pressure to the film to seal the film to the glass surface of the container.
Dependencies are inferred from the claim text.