Patent ID: 6270589
Filing Date: 2001-08-07
Classification: B32B,C22F

Abstract:
A method of manufacturing a resin-coated aluminum alloy sheet for a drawn and ironed can, comprisinghomogenization heat treating an aluminum alloy ingot containing 0.5 to 2.0 wt % of Mn, 0.2 to 2.0 wt % of Mg, 0.05 to 0.4% of Si and not more than 0.7 wt % of Fe, wherein (Si+Fe).ltoreq.0.9 wt %,subjecting the heat-treated aluminum alloy ingot to hot rolling to obtain a hot-rolled aluminum alloy sheet,subjecting the hot-rolled sheet to continuous annealing and cold rolling at a reduction ratio of 30% to not more than 50%,subjecting the annealed and cold-rolled sheet to a surface treatment selected from the group consisting of at least one of etching and electrolytic chromic acid treatment,heating the thus surface treated aluminum alloy sheet to a temperature of 240 to 350.degree. C.,coating both surfaces of the sheet with a thermoplastic resin, andimmediately quenching the thermoplastic resin coated aluminum alloy sheet.