Multi-layer film and medicine container using the same

Details Multi-layer film and medicine container using the same Multi-layer film and medicine container using the same

2009-11-30

2011-10-04

Hern, Brent O (Department: 1783)

Stock material or miscellaneous articles

Structurally defined web or sheet

Including components having same physical characteristic in...

C383S105000, C383S109000, C428S034100, C428S034600, C428S035700, C428S213000, C428S516000

Reexamination Certificate

active

08029885

ABSTRACT:
Disclosed is a multi-layer film comprising: a surface layer having a thickness of 10 to 50 ∫Êm made of an ethylene-∫-olefin copolymer having a density of 0.935 to 0.950 g/cm3, a flexible layer having a thickness of 100 to 200 ∫Êm made of an ethylene-∫-olefin copolymer having a density of 0.860 to 0.930 g/cm3, a barrier layer having a thickness of 10 to 80 ∫Êm made of a mixed resin containing 60 to 95% by weight of a cyclic olefin polymer and 5 to 40% by weight of an ethylene-∫-olefin copolymer having a density of 0.900 to 0.965 g/cm3, and a seal layer having a thickness of 5 to 80 ∫Êm made of an ethylene-∫-olefin copolymer having a density of 0.910 to 0.950 g/cm3. This multi-layer film is suited for use as a material for production of a medicine container10because it suppresses adsorption of a medicine by the barrier layer and is also superior in strength and flexibility.

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