Patent ID: 8053051

Claim:
An oxygen-absorbing barrier film comprising a resin (A) being an ethylene/vinyl alcohol copolymer and having an oxygen permeability of at most 100 cc/m 2 ·day·atm (20 μm) and a resin (B) comprising a cyclized product of a conjugated diene polymer and having an oxygen absorption rate of at least 0.001 cc/cm 2 ·day (20 μm), wherein the resin (B) is dispersed in a matrix of the resin (A) and the resin (B) is in the form of rods of such that an average maximum diameter of a cross section thereof perpendicular to a lengthwise direction is at most 1.0 μm, wherein the oxygen-absorbing harrier film has a three-layered structure of surface layer ( 1 )/core layer/surface layer ( 2 ), wherein proportions of a thickness of respective lavers to an overall thickness of the three layers are from 15 to 40% for the surface layer ( 1 ), from 20 to 70% for the core layer and from 15 to 40% for the surface layer ( 2 ), and wherein a ratio of a major diameter to a minor diameter in the cross section perpendicular to the lengthwise direction of the resin (B) is less than 2.0 in the surface layer ( 1 ) and the surface layer ( 2 ), and is at least 2.0 in the core layer.