... Character:1. Die head can be turned in 360°, it can strengthen the tension the tension and evenness degree of film. 2. Screw ... etc. 3. Die head has been chromized, it is advantage of screw core structure ,melting material extruding evenly, and blowing film smoothly etc. Cooling ... adopts torque motor to adjust, has the merits of smooth film, convenience operation. PP Film Blowing Machine