초록 ▼

The invention provides improved film structure and bags made therefrom for use in sterile packaging, wherein the package and product are sterilized after the process of filling and sealing the bag. The improved structure is a 3-layer coextruded film comprising a first layer of propylene ethylene cop

The invention provides improved film structure and bags made therefrom for use in sterile packaging, wherein the package and product are sterilized after the process of filling and sealing the bag. The improved structure is a 3-layer coextruded film comprising a first layer of propylene ethylene copolymer, a second layer on one surface of the first layer and comprising a blend of propylene ethylene copolymer with linear low density polyethylene, and a third layer of linear low density polyethylene on the opposing surface of the second layer. The blend composition is 20% to 80% propylene ethylene copolymer and 80% to 20% linear low density polyethylene.

대표청구항 ▼

A bag, said bag comprising two facing sidewalls, said sidewalls being joined to each other by heat seals about the periphery of said pouch, said pouch being capable of maintaining strong heat seals and strong interlayer adhesions after being subjected to retort processing conditions, each said sidew

A bag, said bag comprising two facing sidewalls, said sidewalls being joined to each other by heat seals about the periphery of said pouch, said pouch being capable of maintaining strong heat seals and strong interlayer adhesions after being subjected to retort processing conditions, each said sidewall of said bag comprising a first layer disposed toward the interior of said bag and including said heat seals, said first layer comprising a propylene ethylene copolymer; a second layer adhered on one of its surfaces to said first layer and being disposed outwardly of said bag from said first layer, said second layer being a blend of 20% to 80% propylene ethylene copolymer and 80% to 20% linear low density polyethylene; and a third layer adhered to the other said surface of said second layer, said third layer comprising linear low density polyethylene.