发明授权
US5298149A Method for making a tin-plated steel sheet with a chromium bilayer and a copolyester resin laminate 失效
制备具有铬双层和共聚酯树脂层压体的镀锡钢板的方法

Method for making a tin-plated steel sheet with a chromium bilayer and a
copolyester resin laminate
摘要:
A copolyester film was laminated onto a steel sheet, this sheet having double layers consisting of a lower layer of metallic chromium and an upper layer of hydrated chromium oxide on a tin plated steel sheet in which 5 to 40% of the surface of the steel sheet is covered with plated tin and the remainder of the steel surface is exposed and the space between plated tin particles is 0.5 to 50 .mu.m, and a method for production of this copolyester resin film laminated steel sheet which comprises: (a) electroplating with tin under restricted conditions, (b) formation of said double layer on the plated tin and exposed steel surface and (c) lamination of the copolyester resin film at a temperature above the melting temperature of tin.This copolyester resin film laminated steel sheet is suitable for applications wherein excellent corrosion resistance after severe forming is required, such as deeply drawn cans, drawn and redrawn cans, drawn and stretch formed cans, drawn and partially ironed cans and can ends in which a tab for easy opening is attached.
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