... years experience I. What's vacuum forming (Vacuum forming plastic packaging)? Vacuum forming is a process in which a thermoplastic ... process. II. Vacuum Forming Machined process (Vacuum forming plastic packaging):1. Extruding plastic sheet:ABS, HIPS, PP, PE, PC, PMMA ... forming plastic packaging)?1. Uses imported high quality acrylic sheet, ABS, PC, HDPE, PP,PE, PVC, PMMA, HIPS, and other materials ...