... Extruding plastic sheet:ABS, HIPS, PP, PE, PC, PETG, PMMA resin granules are extruded or co-extruded into thermoplastic sheet--textured ... applying vacuum between the mould surface and the sheet to form desired shapes.3. Cooling to maintain shape:Once formed ... all our ABS thermoformed plastic parts will be carefully checked in terms of dimensions, surface finish, stenghth, colour requirements and so on ...