OXYGEN GAS BARRIER FILM

摘要

PROBLEM TO BE SOLVED: To provide a biaxially drawn polypropylene resin film with high oxygen gas barrier properties under high humidity which has not been obtained before by using a conventional PVA(polyvinyl alcohol)-coated biaxially drawn polypropylene resin film. SOLUTION: A PVA resin layer is laminated on at least one side of the biaxially drawn polypropylene resin film and degree of crystalline orientation of equatorial reflection on the PVA resin face obtained by means of a total reflection X-ray diffractometry is made to be at most 60 degrees.