It is used for blowing various plastic film of low density polyethylene(LDPE),high density polyene(HDPE)and linear low density polyethlene(LLDPE)etc.Which are widely used for packing liquid,industrial products,garments and textile and printing lamination.etc..The cylinder and the screw stems of the extruder are made high-quality alloy steel with optimum hardness and strong corrosion resistance after nitrogen treatment and precision finishing.The auxiliary machine has platform woking table formaking operation easy and is equipped with dubble stabilizing ring.Double-rolling and double-cutting coiling unit adopts torque motor to keep proper tension and make even and roll-changing easy.