Patents by Inventor Kunio Akasaki

Kunio Akasaki 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).

  • Antibacterial polyamide fiber and method for producing the same
    Patent number: 7074482
    Abstract: An antibacterial polyamide filament which comprises a polyamide resin containing 0.1 to 5.0 mass % of fine zinc oxide particles and exhibits a color difference caused by the treatment with an alkaline solution of 2.5 or less; and a method for producing the antibacterial polyamide filament which comprises adjusting the moisture content of a polyamide resin chip to 0.05 to 2.0 mass %, followed by melt spinning. Preferably, the antibacterial polyamide filament has a bacteriostatic activity after 50 washings of 2.2 or more, which filament can be produced by melt-spinning the polyamide resin to melt spinning and solidifying the resin at a position 400 mm or less from the face of a spinning nozzle.
    Type: Grant
    Filed: October 25, 2000
    Date of Patent: July 11, 2006
    Assignee: Unitika Fibers Ltd.
    Inventors: Masaki Nishimura, Takeshi Nishiyama, Mitsuo Omori, Eiji Tsukamoto, Seiji Abe, Masahiro Hosoda, Hideharu Yamamoto, Minoru Fujii, Shuhei Kurata, Kunio Akasaki
  • Synthetic fiber capable of absorbing and disabsorbing moisture, entangled yarn blend using the same, knitted and woven goods using the same, and nonwoven fabric using the same
    Patent number: 6756329
    Abstract: A synthetic fiber capable of absorbing and disabsorbing moisture comprising a component capable of absorbing and disabsorbing moisture and a fiber-forming polymer. The fiber of the present invention has a moisture absorption of 1.5% or more when it is allowed to reach a moisture equilibrium under the circumstance of 25° C.×60%RH and then is allowed to stand for 30 min. under the circumstance of 34° C.×90%RH, and has a moisture disabsorption of 2% or more when it is allowed to reach a moisture equilibrium under the circumstance of 34° C.×90%RH and then is allowed to stand for 30 min. under the circumstance of 25° C.×60%RH. The fiber also has a value of −1 to 5 in terms of b value in the CIE-LAB color system when it is allowed to stand for 30 days.
    Type: Grant
    Filed: September 19, 2000
    Date of Patent: June 29, 2004
    Assignee: Unitika Ltd.
    Inventors: Mitsuhiro Umino, Kunio Akasaki, Yoshiaki Kurushima, Kazuyuki Ono, Hajime Yamaguchi, Shigemitsu Murase, Shiro Murakami, Kuzuaki Taruishi