PP PE board (sheet) extrusion line: 1. Screw with special mixing and plasticization function; 2. Coat hanger type die with two throttle design enable to regulate the sheet thickness accurately; 3. The temperature control make the plasticizing process and sheet thickness control more accurate; 4. Horizontal, vertical or 45°incline type three rollers calendars may be lifted freely; 5. Sheet thickness shall be regulated by screw and pressing roller; 6. Separate roller temperature control system to control the temperature of pressing roller to gain even sheet thickness; 7. Winder with big torque motor, and its speed and tension force adjustable. 8. Specification of finished products: Width of board 400-2000mm Thickness of board 0.2-30mm Production capacity 30-600kg/h Production linear speed 10m/min