Taking LLDPE as the main material,together with resins with different trademarks the machine extrudes the single-adhesion or double-adhesion elastic winding film with self adhesion,featuring in higher tensile strength,puncturing resistance and punching resistance.The winding film is of good retracting memory and self adhesion.the goods can be strapped into whole with it,which can keep goods from clasping,loosing and being dusty in transportation. And the film can make the packed goods beautiful,economic and practically due to its excellent transparency. It is widely used for tray packing the bulk containerized goods.