Process for producing laminated film and laminated sheet.

摘要

A process for producing an extrusion laminated film or sheet is disclosed, which process uses no chemical primer and comprises a plastic substrate and a resin for extrusion laminating which process uses no chemical primer and comprises: (A) surface oxidizing at least one surface of the plastic substrate: (1) when the plastic substrate is a polyester resin, <MATH> (2) when the plastic substrate is not a polyester resin, <MATH> wherein DELTA (O/C) = (O/C)* - (O/C) DEG , where (O/C) DEG represents the ratio of the number of oxygen atoms to the number of carbon atoms on the untreated surface of the plastic substrate measured by an Electron Spectroscopy for Chemical Analysis (ESCA) method, and (O/C)* represents the ratio of the number of oxygen atoms to the number of carbon atoms on the oxidized surface of the plastic substrate measured by the ESCA method; (B) melt-extruding a resin selected from polyethylene resins, polypropylene resins, ethylene-vinylester copolymer resins and ethylene-(metha)acrylate copolymer resins into a molten web at a temperature of from 180 DEG C to 340 DEG C and treating at least one surface of the molten web with ozone; and (C) contacting the oxidized surface of the plastic substrate obtained in step (A) with the ozone-treated surface of the molten web obtained in step (B), and adhering the molten web onto the substrate under pressure.