... extruder extrude them to the complex machine head, then produces the co-extruding molded complex film. By this way,it makes possible ... packing and printing machine.It is suitable to produce complex bead sheen film,complex hydro-packing film,insulation film,multi-function farming film,etc.Its ... :4.5T SJ-G Series double (three)-layer co-extrusion rotary machine-head film blowing machine set