... film blowing machine: 1.pof shrink film 2,blown machine 3.pof film,shrink film 4, shrinkable film machine POF film blowing machineThe POF3-Layer coextrusion(polyolefin) heat shrink film blowing machine ... .structure characteristic:1.the unique designed PP/PE/PP 3-LAYER coextrusion die head . ... cooling forming system ,infrared heating system , auto supply gas system,temperature control adjustable module, ...