... What's vacuum forming (vacuum formed plastic tray)? Vacuum forming is a process in which a thermoplastic sheet is heated ... process. II. Vacuum Forming Machined process (vacuum formed plastic tray):1. Extruding plastic sheet:ABS, HIPS, PP, PE, PC, PMMA ... methods are applied as required. III. Main applications (vacuum formed plastic tray): Automotive, electronic, toys, stationery, health & care, food & ...