... blow molding, thermoforming, printing, adhesive, coating and machining, the most important processing method is injection molding. PC Usage: 1 ... of optical instruments. Also, it is used as the transparent materials in plane. 2. PC is good insulation ... , computer, video recorder, telephone switches, signal relay. The PC film is used for capacitors, insulation foreskin, recorder, color video tape. Etc 3 ...