3 Million Flexes Electrical Volume Resistivity ASTM D257* 1015 ohm/m Surface Resistivity ASTM D257* 1013 ohm/sq Dielectric Strength ASTM D149* 125 kV/mm Thermal Usage Temperatures: Suggested Minimum -40 ?C Suggested Maximum 150 (80 ?C if embossed) ?C Dimensional Stability MD 30minutes @ 120?C - 0.3 % TD 30minutes @ 120?C +/- 0.1 % Flammability UL Flame Class* HB Chemical Spot Test ASTM 1308 See Technical Manual Immersion Test MEK 24 hrs Satisfactory Chemical Resistance DIN42 115 See Technical Manual * Figures derived from DuPont Teijin Films (Melinex? O) ** Figures derived from Internal Test Methods Notes (a) Pencil Test: Increasingly hard grades of pencil lead are scored across the surface of the coated PET. The point of the pencil is moved along the surface of the film with increasing force until the pencil breaks or until the surface of the coated film is scratched. The tests are continued until the pencil scratches the surface. The value given is the highest hardness value which does not scratch the coated film (b) Taber Test: A Taber abrader (CF10F wheel;500g load;100 cycles) is used to abrade the test sample. Measurement of the haze value, before and after abrasion, are taken and the & change recorded. The average of three test samples is given (c) Rub Test: A test sample of the coated film is embossed to give a rim profile. The sample is then tested with repeated rubs with a standard rubber finger (45? Shore hardness) which travels along the surface of the film and over the rim. The finger is weighted on a cantilever with a 500g weight. There should be no signs of wear and no evidence of coating delamination. (d) Switch Life: A standard rubber finger (45? Shore hardness) is used to flex an embossed dome switch continuously at a rate of 2 flexes/second. Pressure applied must be sufficient to force the apex of the dome to make contact with the support table. The switch should be examined at regular intervals to check for weight loss due to particles flaking off or cracking. Phone: