Patents by Inventor Takeshi TSUDAKA

Takeshi TSUDAKA 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: 20220363810
    Abstract: Provided is an amorphous epoxy fiber excellent in dimensional stability, a fiber structure comprising at least in part amorphous epoxy fibers, and a molded body formed by melting said fibers. The amorphous epoxy fiber has a birefringence value of 0.005 or lower. For example, the amorphous epoxy fiber may include an amorphous epoxy resin represented by the following general formula: in which, X is a residue of a bivalent phenol and n is 20 or greater (preferably 20 to 300, more preferably 40 to 280, still more preferably 50 to 250). The amorphous epoxy fiber may have an average fiber diameter of single fibers of 40 ?m or smaller.
    Type: Application
    Filed: July 22, 2022
    Publication date: November 17, 2022
    Applicant: KURARAY CO., LTD.
    Inventors: Yuki INOUE, Takeshi TSUDAKA, Ryokei ENDO
  • Publication number: 20220205140
    Abstract: Provided are a polycarbonate fiber having a specific orientation degree and/or a specific birefringence value, a fiber structure as well as a resin composite body. The polycarbonate fiber may have an orientation degree (ft) of lower than 0.70, the orientation degree (ft) being defined by the following formula: ft=1?(1.0/C)2, C: obtained sonic velocity (km/sec), and may have a birefringence value of 0.04 or lower. The polycarbonate fiber may comprise a polycarbonate resin having a number-average molecular weight (Mn) of from 12000 to 40000 and/or a weight-average molecular weight (Mw) of from 25000 to 80000.
    Type: Application
    Filed: March 17, 2022
    Publication date: June 30, 2022
    Applicant: Kuraray Co., Ltd.
    Inventors: Takeshi Tsudaka, Hideki Kamada, Ryokei Endo
  • Publication number: 20210382228
    Abstract: A light-emitting fiber includes a core and a cladding and is configured to emit light through a side surface of the fiber. A resin used for the core is at least one selected from the group consisting of polymethyl methacrylate, polymethyl methacrylate copolymers, polystyrene, polycarbonates, polyorganosiloxanes, and norbornene, and a resin used for the cladding is fluorine resin. The light-emitting fiber has a fiber diameter of 95 ?m or less.
    Type: Application
    Filed: October 23, 2019
    Publication date: December 9, 2021
    Applicant: KURARAY CO., LTD.
    Inventors: Takeshi TSUDAKA, Yosuke WASHITAKE, Ryokei ENDO, Shunsuke SUIKO
  • Publication number: 20210002791
    Abstract: Provided is a semi-aromatic polyamide fiber having excellent spinning stability, heat resistance and chemical resistance. The semi-aromatic polyamide fiber includes a semi-aromatic polyamide resin having a melting point of 290° C. or higher and a plasticizer having a 5% thermal weight reduction temperature of 320° C. or higher, the resin having as a dicarboxylic acid component an aromatic dicarboxylic acid unit and as a diamine component 1,9-nonanediamine unit and 2-methyl-1,8-octanediamine unit in a molar ratio (the former:the latter) of 70:30 to 99:1.
    Type: Application
    Filed: September 17, 2020
    Publication date: January 7, 2021
    Applicant: KURARAY CO., LTD.
    Inventors: Takeshi TSUDAKA, Shohei TSUNOFURI, Yosuke WASHITAKE