Multilayer oxygen barrier with butyl acrylate copolymer outer layers
CA 1302033 C · Owner: Cryovac, Inc. · Inventors: Shah, Gautam P.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
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 …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted June 2, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 2, 2009.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
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Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.