BIAXIALLY ORIENTED POLYAMIDE FILM AND PRODUCTION THEREOF

摘要

PURPOSE:To provide a biaxially oriented polyamide film excellent in bending pinhole resistance, dimensional stability and longitudinal tearing linearity. CONSTITUTION:A biaxially oriented polyamide film is based on a mixture of nylon 6 (N6) and aliphatic polyamide resin (PA) other than N6 in a wt. ratio of (75-99/(25-1) and characterized by that the difference between the surface tension (dyne/cm) of N6 and that of PA satisfies formula 3.0<=gammaA-gammaB<=1 (wherein gammaA is the surface tension of N6 and gammaB is the surface tension of PA) and has longitudinal tearing linearily.