... 1,Certification:CE 2,Process:PVC, PET, PE,PP,ABS sheet plastic sheet extrusion production line( PVC, PET , PP,PE,PS, ... plastic sheet or board. TWO. composition It is made up of screw extruder, mould , three- roll calender , colling suporting frame, tractor ,cutting machine ... 5. three roll calender adopt level type assembly, verical type assembly or incline type assembly. The calender can freely rise ...