POLYESTER FILM FOR CAPACITOR, METALIZED FILM FOR CAPACITOR AND FILM CAPACITOR

摘要

PROBLEM TO BE SOLVED: To prepare a high quality polyester film for a capacitor low in dielectric loss, excellent in voltage endurance, and a metalized film for the capacitor and a film capacitor using the same. SOLUTION: The polyester film for the capacitor is a biaxially oriented film mainly comprising (A) a polyester including (B) a polyetherimide in the biaxially oriented film, and has an extrapolated starting temperature of glass transition at 90-140 deg.C.