BIAXIALLY ORIENTED POLYESTER FILM

摘要

PROBLEM TO BE SOLVED: To provide a biaxially oriented polyester film having excellent heat-resistance, hydrolysis resistance and processability as an insulation film of a motor of an electric car air-conditioner. SOLUTION: The biaxially oriented polyester film is composed of (A) a polyester composed mainly of ethylene terephthalate unit and (B) a polyimide and has a half-life time of the breaking elongation of≥30 hr measured by the treatment at 140°C and 80% RH. COPYRIGHT: (C)2005,JPO&NCIPI