Impact modified film with ph control

Details Impact modified film with ph control Impact modified film with ph control

B - Operations, Transporting

29

C

18/783

B29C 47/06 (2006.01) B32B 27/08 (2006.01)

Patent

CA 2036553

An impact resistant film suitable for medical solution pouches and the packaging of parenteral materials generally includes an interior layer of an ethylene vinyl acetate copolymer and outer layers of a propylene homopolymer or copolymer blended with a styrene ethylene butylene styrene copolymer. In some cases, a flexible copolyester may be substituted for one of the outer blend materials. Sacrificial layers may be optionally included on one or both outer surfaces of the film to improve processing. Additional interior layers of olefin polymers and copolymers such as EVA, and polymeric adhesive layers can also be included. At least one of the EVA or polymeric adhesive layers preferably includes a carbonate of an alkali metal. The flexible copolyester layer preferably includes a high molecular weight stabilizer.

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