Patents by Inventor Fumio Shibao
Fumio Shibao has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20240158901Abstract: To more securely inhibit the occurrence of paint film floating even when drawing is performed by using a Zn—Al—Mg-based alloy plated steel sheet as a base sheet. A pre-coated plated steel sheet according to the present invention includes: a plating layer composed of Zn—Al—Mg-based alloy plating, the plating layer being positioned on one side or both sides of a steel sheet; a chemical treatment film layer positioned on the plating layer; and a paint film layer positioned on the chemical treatment film, in which the paint film layer includes a primer paint film layer, and an upper paint film layer positioned on the primer paint film layer, and at least any of the following is satisfied: both a condition (a-1) and a condition (a-2); a condition (b); and a condition (c).Type: ApplicationFiled: March 23, 2022Publication date: May 16, 2024Applicant: NIPPON STEEL CORPORATIONInventors: Takashi FUJII, Hiroyasu FURUKAWA, Yuki YAMAMURA, Fumio SHIBAO, Kohei UEDA, Akira NAKAGAWA, Naoto SASAKI
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Publication number: 20240150585Abstract: To further improve, even under OT bending with the use of a Zn—Al—Mg-based alloy plated steel sheet as a base sheet, corrosion resistance regarding corrosion under paint film at a OT bent portion and a periphery thereof, without causing occurrence of cracks and peeling in the paint film. A pre-coated plated steel sheet according to the present invention includes: a plating layer composed of Zn—Al—Mg-based alloy plating, the plating layer being positioned on one side or both sides of a steel sheet; a chemical treatment film layer positioned on the plating layer; and a paint film layer positioned on the chemical treatment film, in which the paint film layer includes a primer paint film layer, and an upper paint film layer positioned on the primer paint film layer, and at least any of the following is satisfied: both a condition (a-1) and a condition (a-2); a condition (b); and a condition (c).Type: ApplicationFiled: March 23, 2022Publication date: May 9, 2024Applicant: NIPPON STEEL CORPORATIONInventors: Hiroyasu FURUKAWA, Takashi FUJII, Fumio SHIBAO, Kohei UEDA, Akira NAKAGAWA, Yuki YAMAMURA, Naoto SASAKI
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Publication number: 20230159768Abstract: To retain voids in a paint film even if the paint film is subjected to pressure during storage, transportation, and press working. A pre-painted metal sheet according to the present invention includes: a metal sheet; and a void-containing paint film, which is located on at least one surface of the metal sheet, with dispersed fine particles and voids, wherein when a cross-section of the void-containing paint film cut in a thickness direction of the void-containing paint film is observed, the voids are present in 40 to 95 area % of a total area of the cross-section of the void-containing paint film when an average particle diameter of the fine particles is t [?m] and an average film thickness of the void-containing paint film is T [?m], a ratio t/T is in a range of 0.7 to 3.0, and an elastic modulus of the fine particles, when compressed by 10% from the thickness direction, is 30 MPa or more.Type: ApplicationFiled: July 9, 2021Publication date: May 25, 2023Applicant: NIPPON STEEL CORPORATIONInventor: Fumio SHIBAO
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Patent number: 11377744Abstract: The present invention provides a noble and improved organic resin-coated plated steel sheet which is improved in degreasing properties while securing the characteristics required for the organic resin-coated plated steel sheet. In order to solve the problems, according to one aspect of the present invention, there is provided an organic resin-coated plated steel sheet comprising: a metal coated steel sheet; an organic resin coating covering the metal coated steel sheet; and beads dispersed in the organic resin coating, in which the organic resin coating includes a polyester having a glass transition temperature of 0° C. to 20° C., and a melamine-formaldehyde, the beads are urethane beads having a glass transition temperature of ?60° C. to 50° C., are contained in the organic resin coating at a ratio of 1 to 15 mass % to the total mass of the organic resin coating, and are dispersed in the organic resin coating at an area density of 5 to 1000 pieces/mm2, and relationships of Formulas (1) to (3) are satisfied.Type: GrantFiled: March 9, 2018Date of Patent: July 5, 2022Assignee: NIPPON STEEL CORPORATIONInventors: Fumio Shibao, Masayoshi Nagatomi
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Patent number: 11078590Abstract: A plated steel includes: a steel; a zinc based electroplated layer formed on a surface of the steel; and an organic resin coating layer formed on a surface of the zinc based electroplated layer, in which the surface of the zinc based electroplated layer has hairline extending in a predetermined direction, Ra (ML) measured on the surface of the zinc based electroplated layer is 0.10 to 0.70 ?m, on the surface of the zinc based electroplated layer, a peak number PPI measured in a hairline orthogonal direction with a reference level of 10 ?inch satisfies PPI?350×Ra (MC) with respect to Ra (MC), on a surface of the organic resin coating layer, Ra (CC) satisfies Ra (CC)/Ra (CL)?1.10 with respect to Ra (CL), and Ra (CC) satisfies Ra (CC)<Ra (MC) with respect to Ra (MC).Type: GrantFiled: June 15, 2018Date of Patent: August 3, 2021Assignee: NIPPON STEEL CORPORATIONInventors: Takashi Futaba, Kiyokazu Ishizuka, Fumio Shibao, Ikuo Kikuchi, Hidetoshi Shindo, Hiroaki Uramoto, Keita Katsumaru
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Publication number: 20200141019Abstract: A plated steel includes: a steel; a zinc based electroplated layer formed on a surface of the steel; and an organic resin coating layer formed on a surface of the zinc based electroplated layer, in which the surface of the zinc based electroplated layer has hairline extending in a predetermined direction, Ra (ML) measured on the surface of the zinc based electroplated layer is 0.10 to 0.70 ?m, on the surface of the zinc based electroplated layer, a peak number PPI measured in a hairline orthogonal direction with a reference level of 10 ?inch satisfies PPI?350×Ra (MC) with respect to Ra (MC), on a surface of the organic resin coating layer, Ra (CC) satisfies Ra (CC)/Ra (CL)?1.10 with respect to Ra (CL), and Ra (CC) satisfies Ra (CC)<Ra (MC) with respect to Ra (MC).Type: ApplicationFiled: June 15, 2018Publication date: May 7, 2020Applicant: NIPPON STEEL CORPORATIONInventors: Takashi FUTABA, Kiyokazu ISHIZUKA, Fumio SHIBAO, Ikuo KIKUCHI, Hidetoshi SHINDO, Hiroaki URAMOTO, Keita KATSUMARU
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Publication number: 20200032399Abstract: The present invention provides a noble and improved organic resin-coated plated steel sheet which is improved in degreasing properties while securing the characteristics required for the organic resin-coated plated steel sheet. In order to solve the problems, according to one aspect of the present invention, there is provided an organic resin-coated plated steel sheet comprising: a metal coated steel sheet; an organic resin coating covering the metal coated steel sheet; and beads dispersed in the organic resin coating, in which the organic resin coating includes a polyester having a glass transition temperature of 0° C. to 20° C., and a melamine-formaldehyde, the beads are urethane beads having a glass transition temperature of ?60° C. to 50° C., are contained in the organic resin coating at a ratio of 1 to 15 mass % to the total mass of the organic resin coating, and are dispersed in the organic resin coating at an area density of 5 to 1000 pieces/mm2, and relationships of Formulas (1) to (3) are satisfied.Type: ApplicationFiled: March 9, 2018Publication date: January 30, 2020Applicant: NIPPON STEEL CORPORATIONInventors: Fumio SHIBAO, Masayoshi NAGATOMI
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Publication number: 20180100244Abstract: A surface-treated steel sheet includes a steel sheet; and a plating layer which is formed on one surface or both surfaces of the steel sheet and which includes zinc and one of the group consisting of vanadium and zirconium, wherein the plating layer includes dendrite-shaped crystals including metallic zinc, and intercrystal filling regions which fill spaces between the dendrite-shaped crystals and show amorphous diffraction patterns when electron beam diffraction is carried out, wherein when the plating layer includes the vanadium, the intercrystal filling regions include a hydrated vanadium oxide or a vanadium hydroxide, and, wherein when the plating layer includes zirconium, the intercrystal filling regions include a hydrated zirconium oxide or a zirconium hydroxide.Type: ApplicationFiled: June 9, 2016Publication date: April 12, 2018Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATIONInventors: Fumio SHIBAO, Hiromasa SHOJI
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Patent number: 9868136Abstract: A device for producing a coated steel sheet includes: a blowing-off unit which sprays a gas onto and remove an excessive coating that accumulates along a side edge of a steel sheet that threads along one direction; and a coating-collection unit which collects the excessive coating removed by the blowing-off unit. The blowing-off unit includes a spray nozzle and a gas supply member. The coating-collection unit includes a duct and a coating container. In a case where the duct is seen in a plan view, an outlet thereof is disposed to fit in and overlap an inside of an opening of the coating container, and in a case where the duct is seen in a side view, a gap is provided between the outlet and the opening of the coating container.Type: GrantFiled: March 14, 2012Date of Patent: January 16, 2018Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATIONInventors: Katsuhide Soya, Masayoshi Nagatomi, Fumio Shibao, Hiroyasu Furukawa
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Patent number: 9428823Abstract: A surface-treated steel sheet includes: a steel sheet; and a coated layer which is formed on one surface or both surfaces of the steel sheet and includes zinc and vanadium, wherein the coated layer has a vanadium content of 1% or higher and 20% or less and a coating weight of 3 g/m2 or higher and 40 g/m2 or less, and has a plurality of dendritic arms that are grown in a thickness direction of the steel sheet, and a ratio x/y of a content x of vanadium that is present outside the arms to a content y of vanadium that is present inside the arms is 1.1 or higher and 3.0 or less in terms of vanadium element.Type: GrantFiled: March 29, 2012Date of Patent: August 30, 2016Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATIONInventors: Fumio Shibao, Taihei Kaneto, Masahiro Fuda, Yoshio Kimata
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Publication number: 20140193588Abstract: A device for producing a coated steel sheet includes: a blowing-off unit which sprays a gas onto and remove an excessive coating that accumulates along a side edge of a steel sheet that threads along one direction; and a coating-collection unit which collects the excessive coating removed by the blowing-off unit. The blowing-off unit includes a spray nozzle and a gas supply member. The coating-collection unit includes a duct and a coating container. In a case where the duct is seen in a plan view, an outlet thereof is disposed to fit in and overlap an inside of an opening of the coating container, and in a case where the duct is seen in a side view, a gap is provided between the outlet and the opening of the coating container.Type: ApplicationFiled: March 14, 2012Publication date: July 10, 2014Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATIONInventors: Katsuhide Soya, Masayoshi Nagatomi, Fumio Shibao, Hiroyasu Furukawa
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Publication number: 20140023879Abstract: A surface-treated steel sheet includes: a steel sheet; and a coated layer which is formed on one surface or both surfaces of the steel sheet and includes zinc and vanadium, wherein the coated layer has a vanadium content of 1% or higher and 20% or less and a coating weight of 3 g/m2 or higher and 40 g/m2 or less, and has a plurality of dendritic arms that are grown in a thickness direction of the steel sheet, and a ratio x/y of a content x of vanadium that is present outside the arms to a content y of vanadium that is present inside the arms is 1.1 or higher and 3.0 or less in terms of vanadium element.Type: ApplicationFiled: March 29, 2012Publication date: January 23, 2014Inventors: Fumio Shibao, Taihei Kaneto, Masahiro Fuda, Yoshio Kimata