... Back-to-back two station double winder Accurate Automatic Plastic Film Blowing Machine For Shopping BagProducts information: ModelSJ-60/28- ... tidy - High-quality alloy steel screw and barrel, nitrited, best hardness and corrosion resistance Useage: The blown film machine is mainly ... films such as liquid packaging films, composite-based film, shrink film, tire film, agricultural plastic film, cloth film ...