PE film blowing machine with rotary die, film blower, plastic film machine SJ-55B PE film blowing machine with rotary die, film blower, plastic ... screw and cylinder are made of 38CrMoAl high quality alloy steel after fine finishing and nitrided treatment, which has high ... durven by torque motor, with even and smooth rewinding and easy roll changing PE film blowing machine with rotary die, film blower ...