| abstract |
An electrical insulating polyester film has an apparentndensity of 1.37 to 0.85 g/cm 3 and a tensile modulus of 2.0nto 4.5 GPa. n A film having low oligomer content, low cost, high heatnresistance, high impact resistance, superior machinabilitynand processability, assembling stability, and superiornvisibility is obtained. Furthermore, leakage of current isnreduced when it is used for motor insulation. |