Patents by Inventor Seiji Hanatani

Seiji Hanatani 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: 11920015
    Abstract: To provide an expansion molded product not only excellent in sound absorption properties and rigidity but also resistant to tearing after bending deformation, and a web and a stampable sheet suitable for producing the expansion molded product. The presently disclosed web, stampable sheet, and expansion molded product contain a reinforcing fiber containing an inorganic fiber and an organic fiber, a thermoplastic resin, and a thermal expandable particle, where the proportion of the reinforcing fiber is 20 mass % or more and 55 mass % or less based on a total amount of the reinforcing fiber and the thermoplastic resin, the proportion of the organic fiber is 25 mass % or more and 77 mass % or less based on a total amount of the organic and inorganic fibers, the reinforcing fiber has an average length of 8 mm or more, and the organic fiber has a breaking elongation of 15% or more.
    Type: Grant
    Filed: December 5, 2019
    Date of Patent: March 5, 2024
    Assignees: K-PLASHEET CORPORATION, TOYOTA BOSHOKU KABUSHIKI KAISHA
    Inventors: Yutaka Araki, Seiji Hanatani, Tadaaki Yasumi, Tsutomu Takagi, Atsuhiro Hattori
  • Publication number: 20200407527
    Abstract: To provide an expansion molded product not only excellent in sound absorption properties and rigidity but also resistant to tearing after bending deformation, and a web and a stampable sheet suitable for producing the expansion molded product. The presently disclosed web, stampable sheet, and expansion molded product contain a reinforcing fiber containing an inorganic fiber and an organic fiber, a thermoplastic resin, and a thermal expandable particle, where the proportion of the reinforcing fiber is 20 mass % or more and 55 mass % or less based on a total amount of the reinforcing fiber and the thermoplastic resin, the proportion of the organic fiber is 25 mass % or more and 77 mass % or less based on a total amount of the organic and inorganic fibers, the reinforcing fiber has an average length of 8 mm or more, and the organic fiber has a breaking elongation of 15% or more.
    Type: Application
    Filed: December 5, 2019
    Publication date: December 31, 2020
    Applicants: K-PLASHEET CORPORATION, TOYOTA BOSHOKU KABUSHIKI KAISHA
    Inventors: Yutaka ARAKI, Seiji HANATANI, Tadaaki YASUMI, Tsutomu TAKAGI, Atsuhiro HATTORI
  • Patent number: 8815056
    Abstract: Web containing a thermoplastic resin, reinforcing fibers and thermal expandable particles dispersed therein. The thermoplastic resin and the reinforcing fibers are uniformly dispersed in a thickness direction and the thermal expandable particles are eccentrically located toward one-side surface of the web, wherein opposite sides of the web have substantially different specific gravity and density.
    Type: Grant
    Filed: July 2, 2013
    Date of Patent: August 26, 2014
    Assignee: K-Plasheet Corporation
    Inventors: Yutaka Araki, Seiji Hanatani
  • Publication number: 20130295370
    Abstract: Web containing a thermoplastic resin, reinforcing fibers and thermal expandable particles dispersed therein.
    Type: Application
    Filed: July 2, 2013
    Publication date: November 7, 2013
    Inventors: Yutaka ARAKI, Seiji HANATANI
  • Patent number: 8491754
    Abstract: There is disclosed an expansion molded product, and a web and stampable sheet suitable for use in the production thereof as well as a method of producing the same. A disclosed method of producing a web, stampable sheet and expansion molded product of a stampable sheet comprises uniformly dispersing reinforcing fibers, thermoplastic resin and thermal expandable particles in an aqueous medium containing a surfactant with fine foams to prepare a foamy solution, filtering the foamy solution to form a web, heating pressing and cooling the web to form a stampable sheet, heating the stampable sheet to expand the thermal expandable particles, and shaping and cooling the stampable sheet, wherein the expanded thermal expandable particles are eccentrically located toward one-side surface of the expansion molded product of the stampable sheet by removing foams by suction during the filtering and eccentrically locating the thermal expandable particles toward one-side surface of the web.
    Type: Grant
    Filed: June 7, 2006
    Date of Patent: July 23, 2013
    Assignee: K-Plasheet Corporation
    Inventors: Yutaka Araki, Seiji Hanatani
  • Publication number: 20090223644
    Abstract: There are proposed an expansion molded product used as an internal material, engine cover or the like of an automobile but also a sound absorbing material, sound absorbing wall or the like in the building field and being light in the weight and excellent in not only sound absorbing property but also the surface property and mechanical strength, a web and a stampable sheet suitable for use in the production thereof as well as a method of producing the same.
    Type: Application
    Filed: June 7, 2006
    Publication date: September 10, 2009
    Applicant: K-PLASHEET CORPORATION
    Inventors: Yutaka Araki, Seiji Hanatani
  • Patent number: 6123882
    Abstract: A fiber reinforced thermoplastic resin sheet which has no warpage, higher fiber orientation or randomized fiber orientation, manufactured by supplying a dispersion containing reinforcing fibers and a thermoplastic resin from an inlet onto a moving endless mesh belt and by continuously forming a web in the shape of a sheet while subjecting the dispersion to suction and filtration, is disclosed. The method and apparatus of manufacturing the same by means of controlling the speed ratio and the distribution of the suction amount of the aqueous medium are also disclosed.
    Type: Grant
    Filed: August 19, 1996
    Date of Patent: September 26, 2000
    Assignee: Kawasaki Steel Corporation
    Inventors: Yuichi Uchida, Fumiaki Yoshikawa, Seiji Hanatani, Osamu Nishimura, Masahiko Kajioka
  • Patent number: 6103155
    Abstract: A fiber reinforced thermoplastic resin sheet which has no warpage, higher fiber orientation or randomized fiber orientation, manufactured by supplying a dispersion containing reinforcing fibers and a thermoplastic resin from an inlet onto a moving endless mesh belt and by continuously forming a web in the shape of a sheet while subjecting the dispersion to suction and filtration, is disclosed. The method and apparatus of manufacturing the same by means of controlling the speed ratio and the distribution of the suction amount of the aqueous medium are also disclosed.
    Type: Grant
    Filed: January 12, 1999
    Date of Patent: August 15, 2000
    Assignee: Kawasaki Steel Corporation
    Inventors: Yuichi Uchida, Fumiaki Yoshikawa, Seiji Hanatani, Osamu Nishimura, Masahiko Kajioka
  • Patent number: 5888352
    Abstract: The present invention provides an apparatus for wet manufacturing a fiber reinforced thermoplastic resin sheet, having a manifold capable of uniformly distributing the solid concentrations without being affected by inertia force caused by the difference in shape between solids. The invention further provides an apparatus for wet manufacturing a fiber reinforced resin sheet having a buffer inlet or reservoir headbox capable of permitting inhibition of variations of the unit weight distribution under the effect of the dynamic pressure of the raw material dispersing liquid and the resultant fluctuations.
    Type: Grant
    Filed: August 19, 1996
    Date of Patent: March 30, 1999
    Assignee: Kawasaki Steel Corporation
    Inventors: Fumiaki Yoshikawa, Seiji Hanatani, Yuichi Uchida, Tsuguo Takehara, Isamu Shiota
  • Patent number: 5529808
    Abstract: A glass fiber reinforced polymer which excels in mechanical properties and is suitable for use in a large-sized structural members, formed from a dispersion liquid by dispersing reinforcement glass fibers and particulate thermoplastic resin in a surfactant-containing aqueous medium in which bubbles of air are dispersed, forming a sheet-like web on a porous support plate, and applying heat and pressure to form a sheet. The reinforcement glass fibers include a silane coupling agent while the matrix resin has functional groups bonded to the silane coupling agent. The concentration of said functional groups is higher in the regions adjacent the surfaces of said reinforcement glass fibers than in regions farther removed therefrom, and said concentration progressively decreases in the direction away from said reinforcement glass fibers.
    Type: Grant
    Filed: August 15, 1994
    Date of Patent: June 25, 1996
    Assignee: Kawasaki Steel Corporation
    Inventors: Kunihiko Eguchi, Masafumi Komatsu, Seiji Hanatani, Yuichi Uchida, Tomoshige Ono, Tadahiro Wakui