To produce plastic film from HDPE, LDPE raw material. Multilayer blown film machine, there are at least two screws of its extruder, the film is more thickness and bearing more weight then monolayer film blowing machine. The multilayer blown film machine is go for HD PE,MHDPE,LDPE, LLDPE, MLLDPE, PA and EVOH resin which have gas barrier properties. The film made of multilayer brown film machine mainly use for heavy package, high range food packing bag, vacuo packing bag, liquid packing bad and others. These bags can up to the standard for delay the expiration date.