This machine adopts once-through shaping technique, of high efficiency and excellent product quality. This machine set has such features as scientific and reasonable structure design, smooth and reliable running and convenient operation and maintenance. Polyethylene air-cushion film (also called polyethylene bubble film), which is divided into two kind: Ordinary polyethylene air-cushion film and composite poly-ethylene air-cushion film, is a kind of packing material widely used at present. Tt not only has good cushioning effect, shock resistance and heat-sealing performance, butalso good corrosion resistance ad transparency, etc. So it has been widely used for packing, household wares, post parcel, precise instrument, bicycle, polyurethane furniture, ect.