| 摘要 |
PROBLEM TO BE SOLVED: To produce an aluminum alloy laminate coating material for can body excellent in the adhesion of a laminate film. SOLUTION: In this aluminum alloy laminate coating material for can body obtd. by forming a pretreated film on an aluminum alloy stock and coating the surface with a laminate film, the thickness of an oxidized film in the aluminum alloy stock is <=200Å, and, as for the surface roughness of the pretreated film, in the standard length of 0.8 mm, Ra is controlled to <=0.30μm, and Rmax is controlled to <=2.0μm. Since the oxidized film of the stock is thin, and, moreover, the surface roughness of the pretreated film is small, the adhesion of the laminate film is excellent and the problems of peeling or the like are not caused. The oxidized film of the stock can easily be thinned by executing cleaning treatment with alkali or acid, and the surface roughness of the pretreated film can easily be made small by reducing the surface roughness of a finish pass roll in cold rolling.
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