E. I. DuPont India P. Limited manufactures Polyimide-FEP Fluoropolymer Substrate. E. I. DuPont India P. Limited products are ISO certified. Polyimide-FEP Fluoropolymer Substrates or DuPont™ Kapton®FWR are FWR films that have a unique balance of electrical, thermal, and chemical resistance properties. Proper insulation design and application of these materials will provide tough, high dielectric strength insulation with improved hydrolysis resistance compared to other commonly used polyimide containing materials. These Polyimide-FEP Fluoropolymer Substrates are used in stirrer motors.