The three layer film blowing machine contains three screw, to make film to be three layers. The machine adopts the main material of LLDPE, and with other kind of material like LDPE.HDPE.LLDPE.MLLDPE.PA to making plastic film. Three models of machine to make different size of film, width of 1000mm, 1200mm, 1500mm. The co-extrusion film is widely used for making packing of fruits, meat, milk etc.