| abstract |
PCT No. PCT/JP97/02947 Sec. 371 Date May 6, 1999 Sec. 102(e) Date May 6, 1999 PCT Filed Aug. 25, 1997 PCT Pub. No. WO99/10417 PCT Pub. Date Mar. 4, 1999An electrical insulating polyester film has an apparent density of 1.37 to 0.85 g/cm3 and a tensile modulus of 2.0 to 4.5 GPa. A film having low oligomer content, low cost, high heat resistance, high impact resistance, superior machinability and processability, assembling stability, and superior visibility is obtained. Furthermore, leakage of current is reduced when it is used for motor insulation. |