... three layer.material use PE,and so. A+B+C Three-layer Co-extrusion Blown Film Machine(2)Characteristic ... log raft/flattening roller/winding unit.Uses:A+B+C Series Three-layer Co-extrusion Rotary Die-head Film ... ,pickles,fresh milk,drink etc. because of its good barrier,Moisturizer, prevent damp, prevend rain,prevent wind,prevent frost ... mm)Aφ45 Bφ50 Cφ45Aφ50 Bφ55 Cφ50Aφ55 Bφ65 Cφ55SCREW L/D LENGTH28:1SCREW ...