Patent ID: 6534132
Filing Date: 2003-03-18
Classification: B41M,B65B

Abstract:
A method for producing a printing ink-decorated packaging material, comprising:(a) forming a laminate having a paper core layer with heat sealable outer plastic layers on opposite sides of the paper core, (b) applying a corona discharge surface treatment to at least one of the outer plastic layers; (c) applying a water-based printing ink to the at least one outer plastic layers to which the corona discharge surface treatment has been applied; (d) reducing the surface energy of the at least one outer plastic layers to which the corona discharge surface treatment has been applied; and (e) subsequently applying a surface treatment of hydrogen peroxide to the at least one outer plastic layer, wherein the reducing the surface energy includes heating the surface of the at least one outer plastic layers, andwherein reducing the surface energy after printing causes the decorated packaging material to absorb less hydrogen peroxide during sterilization of the plastic coated web.