Patent ID: 7438940

Claim:
An oxygen permeable polymeric film consisting essentially of a blend of (a) one or more aliphatic, mono-functional organic acids having fewer than 36 carbon atoms or salts thereof and (b) one or more E/X/Y copolymers where E is derived from ethylene, X is derived from C 3 to C 8 α,β-ethylenically unsaturated carboxylic acids, and Y is derived from a softening comonomer, or ionomers of said E/X/Y copolymers, wherein X is about 3 to 30 wt. % of said E/X/Y copolymer, and Y is 0 to about 30 wt. % of said E/X/Y copolymer and wherein 100% of all the acid moieties of (a) and of (b) are nominally neutralized wherein the oxygen permeation rate of the film normalized to one mil thickness is greater than 800 cc-mil/100 in 2 ·day·atm.