The line uses LLDPE as main raw material and adopts several kinds of resins to manufacture three-layer, five-layer co-extruded stretch wrapping film by extruder. The film has excellent tensile strength, puncture resistance and impact resistance. Its good shrinking memory and self-adhesive function can make goods integrity to prevent them from loosening and collapsing during transportation and being polluted by dust. The transparency and tensile strength of this product can make the packaging beautiful, economical and practical. The film can be widely used for wrapping of palletized goods. It's a good substitute for hot shrink packaging film in transportation.