... extruder extrude them to the complex machine head, then produces the co-extruding molded complex film. By this way,it makes possible ... insulation-proof and impenetrability.2) Features: The machine entails advanced consecutive rotation machine head,ensures products more smooth and homogeneous, meets the ... .5T SJ-G Series double (three)-layer co-extrusion rotary machine-head film blowing machine set