PRECOATED STEEL PLATE USED BY APPLYING FINAL COATING AFTER MOLDING AND EXCELLENT IN MOLDING WORKABILITY

摘要

PROBLEM TO BE SOLVED: To produce a precoated steel plate capable of attaining the same coating film properties as that obtained by post coating method and excellent in molding workability by applying a final coating after molding and then being used. ;SOLUTION: A chemical film is formed on a zinc based plated steel plate 0.1-0.8 in center line roughness (Ra) of a plated surface and ≥10g/m² in coating weight and the precoating film 50-120°C in glass transition point and 0.05-0.14 in coefficient of dynamic friction of the coating film surface is formed thereon. The precoating film is preferably a coating film consisting essentially of a polyester based resin composed of a polyester polyol and an amino resin and/or an isocyanate and containing 0.02-2.0 pts.wt. lubricant per 100 pts.wt. resin solid matter.;COPYRIGHT: (C)1997,JPO