Steel sheet and production method therefor
AssigneeJfe Steel Corporation
InventorsShinichi Furuya, Takeshi Matsuda, Tomohiro Aoyama, Shun Koibuchi
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Abstract
A lubricating film-coated steel sheet has at least one surface on which an organic resin film is formed. The organic resin film contains an acrylic resin having a glass transition point (Tg) of 100° C. or higher and an acid value ratio R=acid value (mg-KOH/g)/Tg (° C.) of 1.50 or more, and 5 mass % or more of a polyolefin wax having a melting point of 100° C. or higher and 145° C. or lower and an average particle diameter of 3.0 μm or less, and is formed on a surface of a steel sheet at a coating weight, W, of 0.3 g/m2 or more and 2.5 g/m2 or less per surface.
Claims11
A steel sheet having at least one surface on which a film containing an acrylic resin and a wax is formed, wherein the acrylic resin has a glass transition point (Tg) of 100° C. or higher and an acid value-to-glass transition point ratio R=acid value (mg-KOH/g)/Tg (° C.) of 1.50 or more, the wax is a polyolefin wax that has a melting point of 100° C. or higher and 145° C. or lower and an average particle diameter of 3.0 μm or less, a proportion of the wax in the film is 10 mass % or more, and a coating weight W of the film per surface is 0.3 g/m2 or more and 2.5 g/m2 or less.
Dependencies are inferred from the claim text.