Multilayer oxygen barrier with butyl acrylate copolymer...

Details Multilayer oxygen barrier with butyl acrylate copolymer... Multilayer oxygen barrier with butyl acrylate copolymer...

B - Operations, Transporting

29

C

18/783, 204/91.6

B29C 47/06 (2006.01) B32B 27/08 (2006.01) B65D 65/40 (2006.01) C09D 123/08 (2006.01)

Patent

CA 1302033

64536-612 ABSTRACT OF THE DISCLOSURE A coextruded multiple layer oriented film comprises a core layer comprising an ethylene vinyl alcohol copolymer, two intermediate adhesive layers, and two outer layers comprising a polymeric material selected from the group consisting of ethylene butyl acrylate copolymer, and blends comprising at least 10% of said ethylene butyl acrylate copolymer blended with ethylene alpha-olefin copolymers. A preferred embodiment of the multilayer film exhibits high oxygen barrier especially useful in food packaging applications. Such a film can be made by coextruding such a core layer and two intermediate adhesive layers with two outer layers followed by rapid cooling of the coextruded film, collapsing the cooled film, heating the collapsed film and stretching and orienting the heated film.

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