公开(公告)号：US20240400851A1

公开(公告)日：2024-12-05

申请号：US18698095

申请日：2022-06-17

Applicant: JFE Steel Corporation

Inventor： Shinichi Furuya ,  Takeshi Matsuda ,  Tomohiro Aoyama ,  Shun Koibuchi

IPC: C09D125/14 ,  B05D7/14 ,  C09D5/08 ,  C09D191/06

Abstract: A lubricating film-coated steel sheet to be subjected to complicated forming is disclosed. 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.

公开(公告)号：US20240101920A1

公开(公告)日：2024-03-28

申请号：US18038753

申请日：2021-10-22

Applicant: JFE Steel Corporation

Inventor： Shinichi Furuya ,  Tomohiro Aoyama ,  Shun Koibuchi ,  Takeshi Matsuda

IPC: C10M111/04 ,  C10M101/02 ,  C10M107/26 ,  C10M107/28 ,  C10M107/34 ,  C10M107/38 ,  C10M107/44

CPC classification number: C10M111/04 ,  C10M101/025 ,  C10M107/26 ,  C10M107/28 ,  C10M107/34 ,  C10M107/38 ,  C10M107/44 ,  C10M2205/0225 ,  C10M2209/0625 ,  C10M2209/0845 ,  C10M2209/1013 ,  C10M2209/1023 ,  C10M2209/1033 ,  C10M2213/0623 ,  C10M2217/0453 ,  C10N2050/02

Abstract: A steel sheet having a film containing an organic resin and a wax on at least one surface of the steel sheet, in which the organic resin is at least one of an acryl-based resin, an epoxy-based resin, a urethane-based resin, a phenol-based resin, a vinyl acetate-based resin, and a polyester-based resin, in which the wax is a polyolefin wax having a melting temperature of 120° C. or higher and 140° C. or lower and an average particle size of 3.0 μm or less, in which a proportion of the wax in the film is 10 mass % or more, and in which a coating weight per side W (g/m2) of the film and an arithmetic average roughness Ra (μm) of the steel sheet satisfy relational expression (1) below.


W≥0.12×Ra2+0.2  (1)