... production, for example,PP/ADH/EVOH/ADH/PP structure,EVOH layer is protected from oxygen,and make the package durable.B ... sensor, pressure and extruder rev closed-loop control.C.Five-layer feed box,using flow and the leaves space technology, make ... .Adopt PLC control,data setting,caculation,feed-back ,diagnostic aid and alarm are controlled automatically. Five layer co-extrusion plastic sheet machine