... rectangular bag is less than 30CM. film machine,film blowing machine,film extruder,film machinery,blown film machine:Use: Raw materials of this machine should be selected LDPE, index in ... : Technical StandardQ/ZDSJ104-2001Diameter of ScrewΦ50mmScrew L/D Ratio28:1(L/D)Rational Speed of Screw Stem10-100rpmSpecification OF Die Head ...