Patents by Inventor Shingo Imamura

Shingo Imamura 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).

  • Vinylidene fluoride resin monofilament and method for producing the same
    Patent number: 6677416
    Abstract: A production method of a PVDF monofilament according to the present invention comprises a drawing step of drawing a melt-spun PVDF monofilament; and a dry thermal relaxation treatment step of subjecting the drawn PVDF monofilament to a relaxation thermal treatment in a gas phase at a temperature between 220° C. inclusive and 300° C. and under such conditions that a relaxation rate falls between 4% inclusive and 10% and that a passing time is not more than 5 seconds, thereby obtaining the PVDF monofilament satisfying the relation represented by Eq (1) below; Y≧d3×2×10−7−d2×2×10−4+d×1.17×10−2+73.11  (1) (where d indicates a diameter (&mgr;m) and Y a knot strength (kgf/mm2)) and having a knot elongation of not less than 24% and a straight elongation of not less than 30%.
    Type: Grant
    Filed: June 27, 2002
    Date of Patent: January 13, 2004
    Assignee: Kureha Chemical Industry Company, Limited
    Inventors: Takashi Sato, Kazuyuki Munakata, Shingo Imamura
  • Vinylidene fluoride resin monofilament and method for producing the same
    Publication number: 20030004292
    Abstract: A production method of a PVDF monofilament according to the present invention comprises a drawing step of drawing a melt-spun PVDF monofilament; and a dry thermal relaxation treatment step of subjecting the drawn PVDF monofilament to a relaxation thermal treatment in a gas phase at a temperature between 220° C. inclusive and 300° C.
    Type: Application
    Filed: June 27, 2002
    Publication date: January 2, 2003
    Inventors: Takashi Sato, Kazuyuki Munakata, Shingo Imamura