Patents by Inventor Rumina Obi

Rumina Obi 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).

  • Publication number: 20200316906
    Abstract: Provided is a nonwoven fabric and a laminated nonwoven fabric suitable as the skin material of a composite sound-absorbing material. The nonwoven fabric and laminated nonwoven fabric are easily formable, thin, and lightweight and excel in form stability, and can nevertheless be controlled within a given range of aeration after being formed into shape. A nonwoven fabric having a laminate structure in which at least one ultra-fine fiber layer (M) having an average fiber diameter of 0.3 to 7 ?m (inclusive) and a basis weight of 1 g/m2 to 40 g/m2 (inclusive) and at least one continuous filament layer (S) having an average fiber diameter of 10 to 30 ?m (inclusive) are integrated together by partial thermocompression bonding.
    Type: Application
    Filed: December 13, 2018
    Publication date: October 8, 2020
    Applicant: Asahi Kasei Kabushiki Kaisha
    Inventors: Shinya Yamamuro, Rumina Obi, Kazufumi Kato, Tomoya Tanaka, Chie Okamura, Yasushi Isono, Junki Saito
  • Publication number: 20200040495
    Abstract: The present disclosure provides: a biodegradable nonwoven fabric for thermoforming, the biodegradable nonwoven fabric being composed of a fiber of a polylactic acid-based polymer, and having a basis weight of 20-300 g/m2, preferably, a biodegradable nonwoven fabric characterized by being composed of a long fiber of a polylactic acid polymer, having an MD-direction elongation of 50% or more at 120° C., and having an MD-direction dimensional change rate of ±4% or less at 80-140° C. as determined by thermomechanical analysis; a method for producing a molded body by using said biodegradable nonwoven fabric; and a method for molding a biodegradable beverage extraction container, the method being characterized in that the molded body has an MD-direction elongation change rate of 4% or less, as determined by thermomechanical analysis (TMA) under a load of 0.05 N/2 mm at 30-100° C.
    Type: Application
    Filed: October 12, 2017
    Publication date: February 6, 2020
    Applicant: Asahi Kasei Kabushiki Kaisha
    Inventors: Yusuke Yamada, Chie Okamura, Takuya Matsumoto, Rumina Obi, Kazufumi Kato
  • Patent number: 9972913
    Abstract: An object of the present invention is to provide a noise absorbing fabric in which electromagnetic waves are not susceptible to being reflected and which has superior noise absorbing ability, a noise absorbing fabric having noise absorbing ability across a wide band, a noise absorbing fabric that is soft, highly flexible, thin, and can be incorporated in intricate portions of electronic components or housings and the like by being bent or folded and the like, and a noise absorbing fabric that can be easily and stably produced without using an expensive soft magnetic material, is inexpensive and demonstrates high performance. In the noise absorbing fabric, a metal is subjected to metal processing on at least one side of a fabric, and the common logarithmic value of the surface resistivity of the surface subjected to metal processing is within the range of 0 to 4.
    Type: Grant
    Filed: December 15, 2010
    Date of Patent: May 15, 2018
    Assignee: ASAHI KASEI FIBERS CORPORATION
    Inventors: Kazufumi Kato, Tomoya Tanaka, Rumina Obi
  • Patent number: 9461290
    Abstract: Provided is a separator which shows excellent performance in electric insulation, electrolyte-holding property and ion- or electron-permeability and which can be stably manufactured. The separator is configured from a laminate non-woven fabric consisting of at least two layers, said layers including a non-woven fabric layer (layer I) that comprises a synthetic fiber having a fiber size of 0.1 ?m or greater and less than 4.0 ?m and a non-woven fabric layer (layer II) that comprises a thermoplastic resin fiber having a fiber size of 4.0-30.0 ?m inclusive, and has a weight per area of 3.0 g/m2 or greater and less than 20.0 g/m2.
    Type: Grant
    Filed: April 4, 2013
    Date of Patent: October 4, 2016
    Assignee: ASAHI KASEI FIBERS CORPORATION
    Inventors: Yusuke Yamada, Junichi Kusakabe, Rumina Obi, Shinichi Okajima, Kazufumi Kato
  • Patent number: 9233517
    Abstract: Disclosed is an electromagnetic shielding sheet that has a smaller increase in the thickness of a base after the formation of a metal coating film when compared with conventional electromagnetic shielding sheets, and which has excellent electromagnetic wave shielding properties despite a small amount of adhered metal. According to the present invention, the electromagnetic shielding sheet can endure metal working processes and has high electromagnetic wave shielding properties, resulting in a thin, very flexible fabric sheet. Specifically disclosed is an electromagnetic shielding sheet which is composed of a laminated non-woven fabric that has at least a first layer and a second layer, and which is characterized in that the first layer is a layer of thermoplastic synthetic fibers having a fiber diameter of 6 ?m to 50 ?m, the second layer is a layer of ultrafine fibers having a fiber diameter of 0.1 ?m to 5.0 ?m, and a metal is adhered to at least one surface of the sheet.
    Type: Grant
    Filed: July 22, 2010
    Date of Patent: January 12, 2016
    Assignee: ASAHI KASEI FIBERS CORPORATION
    Inventors: Kazufumi Kato, Kazuaki Shikata, Rumina Obi, Ikuo Ueno
  • Publication number: 20150171397
    Abstract: Provided is a separator which shows excellent performance in electric insulation, electrolyte-holding property and ion- or electron-permeability and which can be stably manufactured. The separator is configured from a laminate non-woven fabric consisting of at least two layers, said layers including a non-woven fabric layer (layer I) that comprises a synthetic fiber having a fiber size of 0.1 ?m or greater and less than 4.0 ?m and a non-woven fabric layer (layer II) that comprises a thermoplastic resin fiber having a fiber size of 4.0-30.0 ?m inclusive, and has a weight per area of 3.0 g/m2 or greater and less than 20.0 g/m2.
    Type: Application
    Filed: April 4, 2013
    Publication date: June 18, 2015
    Applicant: ASAHI KASEI FIBERS CORPORATION
    Inventors: Yusuke Yamada, Junichi Kusakabe, Rumina Obi, Shinichi Okajima, Kazufumi Kato
  • Patent number: 8953304
    Abstract: There is provided a high performance solid electrolytic capacitor that can be manufactured stably. The present invention provides the solid electrolytic capacitor comprising an anode foil and a cathode foil, and a separator arranged between the anode foil and the cathode foil, wherein the anode foil, the cathode foil, and the separator are wound around, so that the separator is intervened between the anode foil and the cathode foil, the anode foil has a dielectric oxide film layer, the separator comprises a solid electrolyte and a nonwoven fabric holding the solid electrolyte, the nonwoven fabric composing the separator is a laminated nonwoven fabric having at least two layers of the nonwoven fabric layers, and the laminated nonwoven fabric comprises a nonwoven fabric layer (layer I) composed of ultra fine fiber having a fiber diameter of 0.1 to 4 ?m, and a nonwoven fabric layer (layer II) composed of a thermoplastic resin fiber having a fiber diameter of 6 to 30 ?m.
    Type: Grant
    Filed: August 19, 2010
    Date of Patent: February 10, 2015
    Assignee: Asahi Kasei Fibers Corporation
    Inventors: Kazufumi Kato, Rumina Obi, Ikuo Ueno
  • Publication number: 20120247868
    Abstract: An object of the present invention is to provide a noise absorbing fabric in which electromagnetic waves are not susceptible to being reflected and which has superior noise absorbing ability, a noise absorbing fabric having noise absorbing ability across a wide band, a noise absorbing fabric that is soft, highly flexible, thin, and can be incorporated in intricate portions of electronic components or housings and the like by being bent or folded and the like, and a noise absorbing fabric that can be easily and stably produced without using an expensive soft magnetic material, is inexpensive and demonstrates high performance. In the noise absorbing fabric, a metal is subjected to metal processing on at least one side of a fabric, and the common logarithmic value of the surface resistivity of the surface subjected to metal processing is within the range of 0 to 4.
    Type: Application
    Filed: December 15, 2010
    Publication date: October 4, 2012
    Inventors: Kazufumi Kato, Tomoya Tanaka, Rumina Obi
  • Publication number: 20120154985
    Abstract: There is provided a high performance solid electrolytic capacitor that can be manufactured stably. The present invention provides the solid electrolytic capacitor comprising an anode foil and a cathode foil, and a separator arranged between the anode foil and the cathode foil, wherein the anode foil, the cathode foil, and the separator are wound around, so that the separator is intervened between the anode foil and the cathode foil, the anode foil has a dielectric oxide film layer, the separator comprises a solid electrolyte and a nonwoven fabric holding the solid electrolyte, the nonwoven fabric composing the separator is a laminated nonwoven fabric having at least two layers of the nonwoven fabric layers, and the laminated nonwoven fabric comprises a nonwoven fabric layer (layer I) composed of ultra fine fiber having a fiber diameter of 0.1 to 4 ?m, and a nonwoven fabric layer (layer II) composed of a thermoplastic resin fiber having a fiber diameter of 6 to 30 ?m.
    Type: Application
    Filed: August 19, 2010
    Publication date: June 21, 2012
    Inventors: Kazufumi Kato, Rumina Obi, Ikuo Ueno
  • Publication number: 20120111627
    Abstract: Disclosed is an electromagnetic shielding sheet that has a smaller increase in the thickness of a base after the formation of a metal coating film when compared with conventional electromagnetic shielding sheets, and which has excellent electromagnetic wave shielding properties despite a small amount of adhered metal. According to the present invention, the electromagnetic shielding sheet can endure metal working processes and has high electromagnetic wave shielding properties, resulting in a thin, very flexible fabric sheet. Specifically disclosed is an electromagnetic shielding sheet which is composed of a laminated non-woven fabric that has at least a first layer and a second layer, and which is characterized in that the first layer is a layer of thermoplastic synthetic fibers having a fiber diameter of 6 ?m to 50 ?m, the second layer is a layer of ultrafine fibers having a fiber diameter of 0.1 ?m to 5.0 ?m, and a metal is adhered to at least one surface of the sheet.
    Type: Application
    Filed: July 22, 2010
    Publication date: May 10, 2012
    Inventors: Kazufumi Kato, Kazuaki Shikata, Rumina Obi, Ikuo Ueno