Abstract: A water dispersion composition containing an ethylene·?-olefin copolymer acid-modified product (B) in a range of 0.01 to 50% by mass, wherein the ethylene·?-olefin copolymer acid-modified product (B) is an acid-modified product of an ethylene·?-olefin copolymer (A) satisfying requirements (A1) to (A6) as specified herein and also satisfies the requirements (B1) to (B5) as specified herein.

Abstract: A tab lead including a first insulating film made of resin is adhered to one of surfaces of a part of a region of a metal plate in a length direction of the metal plate and a second insulating film made of resin is adhered to the other surface of the part of the region. Both end portions of the first insulating film and both end portions of the second insulating film are integrally welded to each other. First protruding portions protruding outward in a thickness direction of the first insulating film are formed at regions of the first insulating film corresponding to both widthwise side edges of the metal plate and vicinities thereof. Second protruding portions protruding outward in a thickness direction of the second insulating film are formed at regions of the second insulating film corresponding to both widthwise side edges of the metal plate and vicinities thereof.

Abstract: A laminating water-based surface treatment agent according to the present invention includes a chitosan derivative, a carboxyl compound having at least one carboxyl group in a molecule, and water. The content mass ratio of the chitosan derivative/the carboxyl compound falls within a range of 1.0/0.5 to 1.0/3.0. The laminating water-based surface treatment agent of the present invention can form an undercoating excellent in HF-resistance, electrolyte resistance, and solvent resistance, and also can sufficiently secure laminating adherence for a long term under more extreme environments required for a packaging material for a battery case or a tab lead for, e.g., a lithium ion secondary battery for automobiles.

Abstract: A terminal lead 1 includes an inner end portion 1a to be arranged inwardly of an exterior casing 9 which accommodates an electrochemistry element 6, an outer end portion 1b to be arranged outwardly of the exterior casing 9, and a plate-shaped metallic substrate 2 as a base material. An insulating resin film 4 is arranged at a portion of the terminal lead 1 corresponding to a seal portion 9x of the exterior casing 9. In this terminal lead 1, a surface coating layer 3 is formed on both surfaces 2p and 2p of the metallic substrate 2 in a thickness direction thereof. A coated amount of both widthwise end portions 3a and 3a of the surface coating layer 3 formed on both surfaces 2p and 2p of the metallic substrate 2 in the thickness direction is less than that a widthwise intermediate portion 3b thereof.

Abstract: A tab lead including a first insulating film made of resin is adhered to one of surfaces of a part of a region of a metal plate in a length direction of the metal plate and a second insulating film made of resin is adhered to the other surface of the part of the region. Both end portions of the first insulating film and both end portions of the second insulating film are integrally welded to each other. First protruding portions protruding outward in a thickness direction of the first insulating film are formed at regions of the first insulating film corresponding to both widthwise side edges of the metal plate and vicinities thereof. Second protruding portions protruding outward in a thickness direction of the second insulating film are formed at regions of the second insulating film corresponding to both widthwise side edges of the metal plate and vicinities thereof.

Abstract: A laminating water-based surface treatment agent according to the present invention includes a chitosan derivative, a carboxyl compound having at least one carboxyl group in a molecule, and water. The content mass ratio of the chitosan derivative/the carboxyl compound falls within a range of 1.0/0.5 to 1.0/3.0. The laminating water-based surface treatment agent of the present invention can form an undercoating excellent in HF-resistance, electrolyte resistance, and solvent resistance, and also can sufficiently secure laminating adherence for a long term under more extreme environments required for a packaging material for a battery case or a tab lead for, e.g., a lithium ion secondary battery for automobiles.