Multiple layer film with amorphous polyamide layer

Details Multiple layer film with amorphous polyamide layer Multiple layer film with amorphous polyamide layer

2005-02-22

2005-02-22

Pyon, Harold (Department: 1772)

Stock material or miscellaneous articles

Composite

Of polyamide

C428S054000, C428S034300, C428S034800, C428S035200, C428S035700, C428S036910, C428S200000, C428S479300, C428S474900, C383S109000, C383S113000, C426S127000

Reexamination Certificate

active

06858313

ABSTRACT:
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.

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