WHITE BIAXIALLY ORIENTED POLYPROPYLENE FILM, PACKAGE, DISPLAY, AND RECEIVING SHEET FOR THERMAL TRANSFER RECORDING MADE OF THE FILM

摘要

PROBLEM TO BE SOLVED: To provide a white biaxially oriented polypropylene film which is low in specific gravity, high in cushioning properties and optical density, excellent in hiding properties and wrinkle resistance, and improved in longitudinal rigidity.;SOLUTION: The oriented polypropylene film is a laminated film of 0.5-0.85 in specific gravity in which a layer B of an polyolefin resin is mounted on at least one side of a cavity-containing layer A. The layer A is made of polypropylene which meets the relationship between melt tension (MS) and a melt flow rate (MFR) when measured at 230°C expressed by formula (1): log(MS)-0.61log(MFR)+0.52.;COPYRIGHT: (C)2004,JPO