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US 6,551,674 B2Granted
Oriented cook-in film with good interply adhesion
AssigneeCryovac, Inc.
InventorsGraham Richard Piper, Ram Kumar Ramesh
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AssigneeCryovac, Inc.
InventorsGraham Richard Piper, Ram Kumar Ramesh
Estimating the term…
A multilayer film suitable for cook-in end use includes an outer layer that includes a homo- or co-polymer of propylene and, directly adhered to the outer layer, a layer that includes at least one of: (a) an ethylene/alkyl acrylate copolymer having a high melting point, (b) propylene/α-olefin copolymer having a lower propylene mer content than the outer layer and having a high Vicat softening point, and (c) an ethylene/vinyl acetate copolymer with at least 15% vinyl acetate mer content. The film exhibits good seal strength and good adhesion between the two layers, even in areas where the film is sealed, even after the film is oriented, even when the film is subjected to the elevated temperatures involved in cook-in procedures, and even where the film is subjected to, e.g., grease from fatty foods. The film also can include one or more other layers including, for example, bulk layers, O2-barrier layers, and/or abuse layers.
A cook-in bag defining an inside of the bag and comprising a multiple layer film comprising:
Dependencies are inferred from the claim text.