Cryovac, Inc.

Carlo E Musco

Thomas Duane Kennedy

Frank M Hofmeister

Paul J Satterwhite

G Vince Sharps

A film includes a core layer having an amorphous polyamide; two intermediate layers, disposed on opposite surfaces of the core layer, including a semicrystalline polyamide; two adhesive layers, each disposed on a surface of the respective intermediate layer, including a polymeric adhesive; and two outer layers, each disposed on a surface of a respective adhesive layer, including an ethylene/alpha olefin copolymer, propylene homopolymer, or propylene/alpha olefin copolymer; and a second outer layer, disposed on a surface of a respective adhesive layer, including amorphous polyamide, semicrystalline polyamide, ethylene/alpha olefin copolymer, propylene homopolymer, or propylene/alpha olefin copolymer. The film can alternatively have a core layer including a polymeric adhesive, and two intermediate layers each having an amorphous polyamide. A method of packaging a product using these films, and a package, are also disclosed.

Multiple layer film with amorphous polyamide layer

A film includes a core layer including a polyamide; two intermediate layers, disposed on opposite surfaces of the core layer, including an adhesive; and two outer layers, each disposed on a surface of the respective intermediate layer, comprising an ethylene/alpha olefin copolymer; wherein the two outer layers each constitute at least 27% of the total thickness of the film. The core layer can include either a single polyamide layer, or three layers wherein two layers of polyamide have therebetween a layer comprising a polymeric adhesive. The film is made preferably by a hot blown process at a blow up ratio of between 2.0:1 and 3.0:1. A process and package are also described.

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Essendon, Australia

Carlo E Musco