Use:It is used for blowing low density polyethylene(LDPE)and high-density polyethyene(HEPE)plastic film to make various vest bags and flat-rim bags which have been widely used for packing in the food industry, garment industry and testile industry, etc.Characteristics:Both the cylinder and the screw of the extruder are made of high-quality alloy steel through nitration and precision finishing with the best hardness and corrosion resistance.Scientifically designed, this machine set has tow heads for one extruder with such advantages as increasing production capacity, saving evergy, labour and workshop area, etc.