LAMINATED POLYESTER FILM AND MAGNETIC RECORDING MATERIAL USING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a laminated polyester film excellent in heat resistance and dimentional stability at a high temperature. SOLUTION: In the laminated polyester film wherein heat-resistant resin layers are provided on both surfaces of a biaxially oriented polyester film, curl quantity at the time of heat treatment at 180 deg.C is set to 10 mm or less.