HDPE/LDPE Film Blowing Machine 1,Rotary Die 2,Back to back winders 3,High output,stable quality 4,Meet CE standard HDPE/LDPE Film Blowing Machine(single winder)/HDPE/LDPE Film Blowing Machine(single winder) The extruder,barrel and screw rods are made of high quality 38CrMoLa alloy steel that have been nitrized and processed in a precision way,it is good in hardness, durable in corrosion ...