Patent ID: 6267826
Filing Date: 2001-07-31
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 consisting essentially of 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 balance Al,subjecting the heat-treated aluminum alloy ingot to hot rolling to obtain a hot-rolled aluminum alloy sheet,subsequently subjecting the hot-rolled sheet to continuous annealing, cold rolling at a reduction ratio of 60 to 95%, and a surface treatment,heating the thus surface treated aluminum alloy sheet at a temperature of 240 to 350.degree. C. for not more than one minute to recover formability,retaining the temperature of the aluminum alloy sheet at 220 to 300.degree. C.,coating both surfaces of the sheet with thermoplastic resin, andimmediately quenching the thermoplastic coated aluminum alloy sheet.