초록

A hermetically sealed pouch, being safe for the storage of foods, avoiding giving a taste to enclosed food, the filled pouch being able to withstand cooking temperatures typically used to cook food.

대표청구항 ▼

A method of making a multiply laminated structure comprising an inside sealing layer containing polypropylene and an outer metal foil layer, which method comprises: (a) applying a primer layer to said metal foil, said primer layer being a graft copolymer of maleic anhydride and propylene wherein the

A method of making a multiply laminated structure comprising an inside sealing layer containing polypropylene and an outer metal foil layer, which method comprises: (a) applying a primer layer to said metal foil, said primer layer being a graft copolymer of maleic anhydride and propylene wherein the maleic anhydride moieties are grafted onto a polypropylene backbone; (b) drawing said primed metal foil laminate and said sealing layer in face-to-face relation into the nip defined by a pair of rollers; and (c) simultaneously drawing a hot layer of extrusion grade polypropylene into said nip between said sealing layer and primer layer to thereby laminate said sealing layer to said primer layer.