CHR CW01-7 polyester films have excellent dimensional stability, high tensile, tear and impact strengths and ultimate elongation up to 120% of its original dimensions. These films exhibit low water absorption and good resistance to oils, greases, strong acids and organic solvents. - Superior tensile strength and adhesion with a high dielectric breakdown voltage. Excellent heat resistance up to 155 °C. They also retain electrical properties, dielectric strength and dielectric constant in continuous operating temperatures from -100 to 350 °F.