| abstract |
(57) [Abstract] PROBLEM TO BE SOLVED: To provide a urethane resin film-coated zinc-based plated steel sheet, the resin film of which has excellent adhesiveness regardless of the type of the adhesive, and which can be removed by an alkaline solution. . A urethane resin having a carboxyl group in the molecule is used as the urethane resin, and the acid value of the carboxyl group-containing urethane resin is in the range of 40 to 70, and the elastic modulus of the resin at 25 ° C. 1000 ~ Shall be in the range of 40,000 N / cm 2 , and The film formed of the carboxyl group-containing urethane resin has a thickness of 0.5 to 5 μm. Average particle size of 0.1 It is also possible to contain 1 to 25% by mass of a synthetic resin powder having a size of 3 μm. |