Patents by Inventor Shinichi Okajima

Shinichi Okajima 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: 20210115604
    Abstract: Provided is a cellulose fiber nonwoven fabric with compacted parts that is beautiful even when dry. The cellulose fiber nonwoven fabric is characterized in that: the fabric has compacted parts; the percentage of recesses due to the compacting is 9-25%; the transverse rupture strength is at least 15 N; the transmittance of the compacted parts when dry is 3-25%; and the fabric weight is 30 g/m2 to 110 g/m2.
    Type: Application
    Filed: March 28, 2018
    Publication date: April 22, 2021
    Applicant: Asahi Kasei Kabushiki Kaisha
    Inventors: Chihiro Masuda, Takayuki Ogawa, Shinichi Okajima
  • Publication number: 20170002488
    Abstract: Provided is a noise-absorbing sheet that is highly effective at absorbing noise from magnetic and/or electric fields, the noise-absorbing effect being effective in wider bandwidths. A noise-absorbing sheet upon which at least two layers are stacked, wherein the noise absorbing sheet is characterized in that a magnetic layer containing a magnetic material and a layer of a noise-absorbing fabric in which a metal is deposited on constituent fibers are layered on said sheet, and the common logarithmic value of the surface resistivity of at least one side of the noise-absorbing fabric is 0 to 6.
    Type: Application
    Filed: November 21, 2014
    Publication date: January 5, 2017
    Applicant: ASAHI KASEI KABUSHIKI KAISHA
    Inventors: Tomoya TANAKA, Chie OKAMURA, Shinichi OKAJIMA, Tomoyuki KAWAMURA, Kazufumi KATO
  • 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
  • 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: 6916535
    Abstract: The present invention provides a poly(trimethylene terephthalate) pellet comprising 80 wt % or more of trimethylene terephthalate repeating units copolymerized with bis(3-hydroxypropyl) ether at a ratio in a range from 0.01 to 2 wt %, wherein an amount of terminal carboxyl groups is 25 milli-equivalent/kg or less and an intrinsic viscosity is in a range from 0.8 to 2 dl/g, which pellet has an L* value of 75 or more, a b* value in a range from ?2 to 5, and a weight in a range from 1 to 50 mg/piece.
    Type: Grant
    Filed: April 29, 2002
    Date of Patent: July 12, 2005
    Assignee: Asahi Kasei Kabushiki Kaisha
    Inventors: Shinichi Okajima, Jinichiro Kato, Katsuhiro Fujimoto
  • Patent number: 6645619
    Abstract: The present invention provides poly(trimethylene terephthalate) copolymerized with ester-forming sulfonate and a fiber thereof. The polymer of the present invention is high in melting point, small in loss of melting viscosity and has a high molecular weight. The fiber of the present invention is high in toughness, excellent in whiteness and dyeable with a cationic dye, whereby it is useful for clothing, carpets or non-woven sheets, etc.
    Type: Grant
    Filed: June 12, 2002
    Date of Patent: November 11, 2003
    Assignee: Asahi Kasei Kabushiki Kaisha
    Inventors: Jinichiro Kato, Tetsuko Takahashi, Shinichi Okajima, Katsuhiro Fujimoto, Kenji Imura
  • Publication number: 20030092874
    Abstract: The present invention provides a poly(trimethylene terephthalate) pellet comprising 80 wt % or more of trimethylene terephthalate repeating units copolymerized with bis (3-hydroxypropyl) ether at a ratio in a range from 0.01 to 2 wt %, wherein an amount of terminal carboxyl groups is 25 milli-equivalent/kg or less and an intrinsic viscosity is in a range from 0.8 to 2 dl/g, which pellet has an L* value of 75 or more, a b* value in a range from −2 to 5, and a weight in a range from 1 to 50 mg/piece.
    Type: Application
    Filed: April 29, 2002
    Publication date: May 15, 2003
    Applicant: ASAHI KASEI KABUSHIKI KAISHA
    Inventors: Shinichi Okajima, Jinichiro Kato, Katsuhiro Fujimoto
  • Publication number: 20030065105
    Abstract: The present invention provides poly(trimethylene terephthalate) copolymerized with ester-forming sulfonate and a fiber thereof. The polymer of the present invention is high in melting point, small in loss of melting viscosity and has a high molecular weight. The fiber of the present invention is high in toughness, excellent in whiteness and dyeable with a cationic dye, whereby it is useful for clothing, carpets or non-woven sheets, etc.
    Type: Application
    Filed: June 12, 2002
    Publication date: April 3, 2003
    Inventors: Jinichiro Kato, Tetsuko Takahashi, Shinichi Okajima, Katsuhiro Fujimoto, Kenji Imura
  • Patent number: 5922445
    Abstract: A sheet-like composite material which is obtained by coating or impregnating a fibrous base material with an elastic polymeric substance, in which the fibers constituting the fibrous base material and the elastic polymeric substance are prevented from bonding with each other, and which is extremely flexible and has excellent wear resistance and an extremely high peel strength, which material may be produced for example by applying a hydrophobicizing treatment to the fibrous base material, then impregnating or coating a solution of the elastic polymeric substance to which a hydrophilic silicone has been added, and wet solidifying.
    Type: Grant
    Filed: June 14, 1995
    Date of Patent: July 13, 1999
    Assignee: Asahi Kasei Kogyo Kabushiki Kaisha
    Inventors: Minoru Yoshida, Shinichi Okajima, Minoru Fukui