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US 2014/0370278 A1Published application
Multilayer film comprising cyclic olefin copolymer
AssigneeE. I. Du Pont de Nemours and Company
InventorsKarlheinz Hausmann, Yves M Trouilhet
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Abstract
Disclosed is a multilayer film structure, comprising, in order, a puncture resistant layer comprising at least one cyclic olefin copolymer (COC) and at least one ionomer or polyolefin, a tie layer and a sealant layer. The structure can be coextruded and can be prepared using a triple bubble process.
Claims25
A coextruded multilayer film structure comprising, in order,
- at least one puncture resistant layer comprising at least one cyclic olefin copolymer and at least one ionomer or polyolefin;
- at least one tie layer;
- at least one barrier layer consisting essentially of a layer of ethylene vinyl alcohol copolymer (EVOH) between at least two layers each independently comprising a polyamide, a cyclic olefin copolymer or a blend of cyclic olefin copolymer and polyethylene or polypropylene or ionomer;
- and
- at least one sealant layer;
- wherein the film is either monoaxially oriented or biaxially oriented.
3 more elements
Dependencies are inferred from the claim text.