High gas barrier co-extruded multilayer films

Details High gas barrier co-extruded multilayer films High gas barrier co-extruded multilayer films

B - Operations, Transporting

32

B

B32B 27/08 (2006.01) B29B 17/00 (2006.01) B29C 47/06 (2006.01) B32B 33/00 (2006.01) C08J 11/00 (2006.01) C08J 11/08 (2006.01) C08L 29/04 (2006.01) C08L 33/10 (2006.01)

Patent

CA 2094677

ABSTRACT By addition of methacrylate/unsaturated acid and/or vinyl amide copolymers, poly(vinyl alcohol) can be melt-processed and co-extruded with structural polymers like poly(ethylene terephthalate) to form multilayer films and objects with good adhesion between the components and good barrier properties. The films and objects can be separated and re-used by dissolution in water of the poly(vinyl alcohol)/methacrylate polymer blends and recovery of the structural polymer.

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