The barrel and screw of the rotary head polypropylene blown film extruder are made of high-quality alloy steel, which has been nitrided and precision processed. Has the best hardness and corrosion resistance. According to the process requirements, raise the extruder to 3 meters and blow the film using the down blowing method. The winding device adopts a torque motor, which can maintain appropriate tension, winding neatly, and easy to change.