Abstract: The present invention aims to offer thermoplastic resin coated aluminum alloy sheet having excellent adhesion after forming, wherein the laminated thermoplastic resin layer will not peel off even when subjected to such severe forming as drawing, followed by stretch-forming, further followed by ironing. In order to achieve this, aluminum alloy sheet is treated with alkali solution by dipping into or spraying alkali solution, rinsed, treated with acid solution by dipping into or spraying acid solution so as to obtain a specific surface condition, and further laminated with thermoplastic resin with or without adhesive on both sides of the aluminum alloy sheet.

Abstract: The present invention aims to offer thermoplastic resin coated aluminum alloy sheet having excellent adhesion after forming, wherein the laminated thermoplastic resin layer will not peel off even when subjected to such severe forming as drawing, followed by stretch-forming, further followed by ironing. In order to achieve this, aluminum alloy sheet is treated with alkali solution by dipping into or spraying alkali solution, rinsed, treated with acid solution by dipping into or spraying acid solution so as to obtain a specific surface condition, and further laminated with thermoplastic resin with or without adhesive on both sides of the aluminum alloy sheet.

Abstract: A laminated steel sheet of the present invention has a surface-treated steel sheet with an outermost chromium oxide having specific surface area of 1.08 to 1.35 as a base sheet, and a plastic film is laminated on at least one side of the base sheet, and has excellent in tenacious adhesion to the plastic film after forming.

Abstract: A method of manufacturing a resin-coated aluminum alloy sheet for drawn and ironed cans, which coated sheet can be subsequently formed into a drawn and ironed can without its wall breaking, and having substantial strength, the can-forming process including a bending and bending back operation at a die shoulder rounded portion of small radius, and a subsequent dry ironing operation. The coated sheet is formed by homogenization heat treating an aluminum alloy ingot containing essentially 0.5 to 2.0 wt % of Mn, 0.2 to 2.0 wt % of Mg, 0.05 to 0.4 wt % of Si and not more than 0.7 wt % of Fe, wherein (Si+Fe)≦0.9 wt %, and subjecting the aluminum alloy ingot to hot rolling to obtain an aluminum alloy sheet, followed by continuous annealing, cold rolling, and surface treatment, heating the resultant sheet, and then coating both surfaces of the sheet with a thermoplastic resin at a predetermined temperature, and immediately quenching the sheet.

Abstract: A method of manufacturing a resin-coated aluminum alloy sheet for drawn and ironed cans, which can be formed into a drawn and ironed can free from its wall breaking and having enough strength as a can, when it is formed through a composite forming process, the process including a bending and bending back operation at a die shoulder rounded portion of a small shoulder radius and a subsequent ironing operation, under dry condition; which comprises the steps of homogenization heat treating an aluminum alloy ingot containing essentially 0.5 to 2.0 wt % of Mn, 0.2 to 2.0 wt % of Mg, 0.05 to 0.4 wt % of Si and not more than 0.7 wt % of Fe as inevitable impurities, wherein (Si+Fe)≦0.

Abstract: A thermoplastic resin coated aluminum alloy sheet has excellent processing adhesion and high adhesion after retort processing such that laminated thermoplastic resin layers do not peel off even when the alloy sheet is subjected to severe processing such as stretching after deep drawing and furthermore, ironing. A production method and a production apparatus for the alloy sheet are also described. A treatment by an alkaline solution and a treatment by an acidic solution are sequentially applied to bring the surface of an aluminum alloy sheet into a specific surface state and then electrolytic chromic acid treatment is carried out by a known method so as to laminate a thermoplastic resin to an aluminum alloy sheet having a two-layered film which comprises metallic chromium as the lower layer and a chromium hydrate as the upper layer and has a specific surface condition.

Abstract: A thermoplastic resin-coated aluminum alloy plate having so high a processing adhesion that the laminated thermoplastic resin layer is not separated therefrom even when the plate is subjected to a severe forming process in which the plate is deep-drawn, stretched and then ironed. A process and an apparatus for producing the same are also disclosed. An aluminum alloy plate is treated with an alkali solution and an acid solution in order so as to put the surface of the plate in a special condition. The resultant plate is subjected to anodic electrolysis using a direct current in an acid solution containing one or more of inorganic acid, such as sulfuric acid and an organic acid, such as carboxylic acid or hydroxy carboxylic acid. Alternatively, the resultant plate is subjected to a treatment using hot water of above 60.degree. C., boiling water, or water vapor so as to form a uniform hydration oxide film of 2-10 nm in thickness. The alloy plate is coated with a thermoplastic resin.