Patents by Inventor Tatsuhiko IWA

Tatsuhiko IWA 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).

  • Patent number: 11642871
    Abstract: A surface-treated metal sheet for adhesion to polyolefin includes a metal sheet, and a resin layer provided on at least one surface of the metal sheet. The resin layer contains an acid- modified polyolefin, the acid-modified polyolefin contains a first acid-modified polyolefin having an acid value of 5 mgKOH/g or less, particularly 4 to 5 mgKOH/g, and a second acid- modified polyolefin having an acid value of 20 mgKOH/g or more and a melting point of higher than 90° C., and a difference between a melting point of the first acid-modified polyolefin and the melting point of the second acid-modified polyolefin is 0° C. or more and less than 40° C. The resin layer has a surface roughness of 12 ?m or less in terms of arithmetic average roughness Ra.
    Type: Grant
    Filed: February 21, 2018
    Date of Patent: May 9, 2023
    Assignee: Kobe Steel, Ltd.
    Inventors: Yasuo Hirano, Tatsuhiko Iwa, Tetsuya Yamamoto, Takeshi Watase
  • Publication number: 20200023616
    Abstract: A surface-treated metal sheet for adhesion to polyolefin includes a metal sheet, and a resin layer provided on at least one surface of the metal sheet. The resin layer contains an acid-modified polyolefin, the acid-modified polyolefin contains a first acid-modified polyolefin having an acid value of 5 mgKOH/g or less and a second acid-modified polyolefin having an acid value of 20 mgKOH/g or more and a melting point of higher than 90° C., and a difference between a melting point of the first acid-modified polyolefin and the melting point of the second acid-modified polyolefin is 0° C. or more and less than 40° C.
    Type: Application
    Filed: February 21, 2018
    Publication date: January 23, 2020
    Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
    Inventors: Yasuo HIRANO, Tatsuhiko IWA, Tetsuya YAMAMOTO, Takeshi WATASE
  • Publication number: 20190375194
    Abstract: A surface-treated metal sheet for polyolefin adhesion is provided with a metal sheet, a first layer provided on at least one surface of the metal sheet, and a second layer provided on the first layer, wherein the first layer containing an epoxy resin and a blocked isocyanate, the second layer containing an acid-modified polyolefin resin, the thickness of the first layer being 15 to 40 ?m, and the thickness of the second layer being 4 to 30 ?m.
    Type: Application
    Filed: February 21, 2018
    Publication date: December 12, 2019
    Applicant: KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.)
    Inventors: Yasuo HIRANO, Tatsuhiko IWA, Tetsuya YAMAMOTO, Takeshi WATASE
  • Patent number: 10399300
    Abstract: Provided are: a surface-treated metal sheet that is useful when integrating a molded plastic (resin) article and a metal sheet during injection molding; and a metal sheet-resin composite molded article in which the metal sheet and a resin molded article are integrated. The surface-treated metal sheet consists of a laminate having a metal substrate, a chemical conversion coating film and an adhesive layer in order, and is characterized in that the chemical conversion coating film contains colloidal silica and a thermosetting resin.
    Type: Grant
    Filed: October 30, 2014
    Date of Patent: September 3, 2019
    Assignee: KOBE STEEL, LTD.
    Inventors: Yasuo Hirano, Takeshi Watase, Tatsuhiko Iwa
  • Publication number: 20180123065
    Abstract: An organic electronic device provided with an organic electronic element on one surface of a substrate, wherein the substrate has a metal layer and an insulating layer overlaid on at least one face side of the metal layer, and the one face of the substrate does not have an irregularity peak having a K value of equal to or lower than ?0.07 as calculated by expression (1). In the expression (1), x represents an irregularity peak position when a line roughness analysis is conducted on a 10 ?m square on the one face of the substrate with an interval of 2.45 nm, f(x) represents a surface irregularity height (nm) at x, and dx represents an infinitesimal change in x. K=[f(x+dx)?2f(x)+f(x?dx)]/dx2 . . .
    Type: Application
    Filed: May 24, 2016
    Publication date: May 3, 2018
    Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
    Inventors: Yoko SHIDA, Masao MIZUNO, Yasuo HIRANO, Tatsuhiko IWA, Takeshi WATASE
  • Publication number: 20180079178
    Abstract: A surface-treated metal sheet which is used for insert molding and in which a hot melt adhesive layer is laminated on at least one side of a metal substrate, where the hot melt adhesive layer has a thickness of 10 to 100 ?m; the hot melt adhesive layer contains a high melting point crystalline modified polypropylene having a melting point of 120° C. or higher and a low melting point crystalline modified polypropylene having a melting point of lower than 120° C.; and the rate of change of tensile shear adhesion strength measured at 23° C. of a metal sheet-resin composite molded article obtained when uniting a polypropylene-based resin and the surface-treated metal sheet by insert molding while varying mold temperature is 2 MPa or less per ° C. of mold temperature.
    Type: Application
    Filed: March 23, 2016
    Publication date: March 22, 2018
    Applicant: KABUSHIKI KAISHA KOBE SEIKO SHO (Kobe Steel, Ltd.)
    Inventors: Tatsuhiko IWA, Takeshi WATASE, Yasuo HIRANO
  • Publication number: 20160243794
    Abstract: Provided are: a surface-treated metal sheet that is useful when integrating a molded plastic (resin) article and a metal sheet during injection molding; and a metal sheet-resin composite molded article in which the metal sheet and a resin molded article are integrated. The surface-treated metal sheet consists of a laminate having a metal substrate, a chemical conversion coating film and an adhesive layer in order, and is characterized in that the chemical conversion coating film contains colloidal silica and a thermosetting resin.
    Type: Application
    Filed: October 30, 2014
    Publication date: August 25, 2016
    Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
    Inventors: Yasuo HIRANO, Takeshi WATASE, Tatsuhiko IWA