Oxygen-Absorbing multi-layer film and method for preparing same

摘要

An object of the present invention is to provide a practical absorbing multi-layer film in which even if a deoxidizing agent having a prevalent particle diameter is used as a deoxidizing resin composition component, no roughness occurs on the surface of an oxygen absorbing multi-layer film and particles neither protrude nor expose through the film surface and which is excellent in gas barrier properties, heat-seal properties, productivity and handling properties; and a method for preparing the absorbing multi-layer film. A method for preparing an oxygen absorbing multi-layer film having a smooth surface which comprises the steps of using a polyolefin resin constituting a smoothing layer C as a substrate film for lamination, extruding a resin composition blended with a particulate oxygen absorbing composition on its one surface, laminating while a cooling roll is closely brought into contact from its back surface to form a deoxidizing resin layer B, further forming an oxygen-permeating resin layer A comprising a thermoplastic resin, and then arranging a gas barrier material on another surface to form a gas barrier layer D.