... film machine SJ-55B PE film blowing machine with rotary die, film blower, plastic film machineIt is suitable for ... 1 Rotate speed of screw: 10-110rpm diameter of die: 60-80mm Film thickness: 4-80micron Film folded ... strong resistance to corrosion,durable service.2) The die is plated with hard chrome, of screw mandrel ... changing PE film blowing machine with rotary die, film blower, plastic film machine