... 3 layers co-extrude PE film blowing machineUSAGEThis machine is Three layers PE plastic film blowing machine for blowing three layers PE(HDPE, LDPE, ... for packing liquid food, like soft drink, milk, pure water. Etc., and widely used for making bags, protecting bags, ... Main motor and traction motor speed control.2. Screw and barrel: Dual 38CrMoAlA after nitrogen treatment, supplied from zhoushan city ...