MULTI-LAYER RESIN FILM WITH OUTSTANDING OXYGEN GAS BARRIER PROPERTIES AND MOISTUREPROOFNESS

摘要

PROBLEM TO BE SOLVED: To provide a multi-layer resin film having outstanding oxygen gas barrier properties and moistureproofness.;SOLUTION: This multi-layer resin film is composed of a biaxially oriented polypropylene resin layer containing 10-40 wt% of a high crystallization resin and 6-15 wt% of a petroleum resin, and a polyvinyl alcohol resin layer laminated on at least one side of the former through an adhesive layer. In addition, the multi-layer resin film is characterized in that the oxygen transmittance at a relative humidity of 85% RH(request response header) and at a temperature of 23°C is 600 ml/m² x day x MP(methyl propionate)a or less and the water vapor transmittance at a relative temperature of 90°C and a temperature of 40°C is 3.5 g/m² x day x 20 μm or less. Thus the obtained multi-layer resin film which does not contain chlorine and has outstanding oxygen gas barrier properties and moistureproofness, is best-suited for use as a film for packaging, in particular, packaging foods.;COPYRIGHT: (C)2004,JPO