NOVELTY - A wrapping material (1) consists of heat-resistant resin stretched film layer (2), thermoplastic resin unstretched-film layer (3), and aluminum foil layer (4). The thermoplastic resin unstretched-film layer and the aluminum foil layer are adhered through adhesive bond layers (5,6) formed by polyolefin resin having carboxyl group, and a polyfunctional isocyanate compound. The equivalent ratio of isocyanate group of the polyfunctional isocyanate compound with respect to the hydroxyl group of the polyolefin resin is 1-10.    USE - Wrapping material is used for battery case (claimed) e.g. nonaqueous electrolyte-type lithium-ion secondary battery case. Uses include but are not limited to notebook personal computer, video camera, mobile telephone and electric vehicle.    ADVANTAGE - The wrapping material has excellent moldability and durability, and reduced water permeability. The time-dependent fall of the adhesive strength between the aluminum foil layer and inner side layer is suppressed for a long period of time. The generation of pinhole and crack in the battery case formed using the wrapping material is prevented.    DETAILED DESCRIPTION - A wrapping material consists of heat-resistant resin stretched film layer as an outer side layer, thermoplastic resin unstretched-film layer as an inner side layer, and aluminum foil layer arranged between layers (2) and (3) as interlayer. The thermoplastic resin unstretched-film layer and the aluminum foil layer are adhered through the adhesive bond layer formed by polyolefin resin having carboxyl group, and a polyfunctional isocyanate compound. The equivalent ratio of isocyanate group of the polyfunctional isocyanate compound with respect to the hydroxyl group of the polyolefin resin is 1-10. An INDEPENDENT CLAIM is included for battery case.    DESCRIPTION OF DRAWING(S) - The drawing shows a sectional view of the wrapping material for battery cases.    Wrapping material (1)    Heat-resistant resin stretched film layer (2)    Thermoplastic resin unstretched-film layer (3)    Aluminum foil layer (4)    Adhesive bond layers (5,6)