This machine adopts once-through shaping technique,thus has 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 polyethylene air-cushion film,is a kind of packing material which has been widely used at present.It not only has good cushioning effect,stock resistance and heat-sealing performance,but also has such advantages as good corrosion resistance and transparency,etc.so it has been widely used for packing,household wares,post parcel,pricse instrument,bicycle,polyurethane furniture,etc.