E. I. DuPont India P. Limited manufactures Crystalline Polyimide Film. E. I. DuPont India P. Limited products are ISO certified. Crystalline Polyimide Film or DuPont™ Kapton®PST is designed for the pressure sensitive tape industry with improved film attributes for PST coaters. It includes superior point thickness and gauge control across the web, improved roll formation, and extended roll lengths.