PE Film Blowing Machine,rotary die head film blowing machine,double rewinding film extruder,extruding machine.. 3FM3500-I THREE-LAYER COEXTRUSION ... LtdA, Equipment specifications and technical parameter1, Single screw extruder(totally 3 sets)SJ-120/30 1.1screwa, ... Wave form screw rodd, material 38CrMoALA Nitrogen treatment1.2 Machine cana, Aperture 120b, material 38CrMoALA slack quench. Nitrogen ...