POLYOLEFIN FILM

摘要

PURPOSE: To prevent a deterioration of an appearance of a film and to improve shield properties by incorporating an X-ray scattering phi (ϕ) scan full width half maximum(FWHM) value greater than a specific value in a polymer film having a biaxially oriented substrate layer of a propylene polymer. CONSTITUTION: The polymeric film preferably has an X-ray scattering phi (ϕ) scan full width half maximum(FWHM) value greater than 16 degrees and an X-ray scattering key (X) scan MD/TD ratio of 1.0 or more or more preferably an X-ray scattering phi (ϕ) scan full width half maximum(FWHM) value greater than 17.5 to 20.0 degrees and an X-ray scattering key (X) scan MD/TD ratio of 1.15 to 1.3. A support preferably further has an elasticity improving agent. The film preferably has an additional polymeric heat sealing layer at least on one surface of a propylene polymer support layer.