Patents by Inventor Tadaaki Hamaguchi

Tadaaki Hamaguchi 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).

  • Hydrophilic polyester fiber and hydrophilic nonwoven fabric using the same and their production
    Patent number: 6720070
    Abstract: A hydrophilic polyester fiber is supplied with an aqueous mixed dispersion on the surface and made hydrophilic by being heated at 35° C. or higher, and the aqueous mixed dispersion employed contains a polyester-polyether block copolymer composed of a polyester component and a polyether component and is stable at lower than 35° C. and precipitates the polyester-polyether block copolymer when its dispersion state is broken by being heated to 35° C. or higher.
    Type: Grant
    Filed: April 27, 2001
    Date of Patent: April 13, 2004
    Assignee: Toyo Boseki Kabushiki Kaisha
    Inventors: Tadaaki Hamaguchi, Hiroshi Maruyama, Shigeki Tanaka, Hisao Nishinaka
  • Hydrophilic polyester fiber and hydrophilic nonwoven fabric using the same and their production
    Publication number: 20020031968
    Abstract: A hydrophilic polyester fiber is supplied with an aqueous mixed dispersion on the surface and made hydrophilic by being heated at 35° C. or higher, and the aqueous mixed dispersion employed contains a polyester-polyether block copolymer composed of a polyester component and a polyether component and is stable at lower than 35° C. and precipitates the polyester-polyether block copolymer when its dispersion state is broken by being heated to 35° C. or higher.
    Type: Application
    Filed: April 27, 2001
    Publication date: March 14, 2002
    Inventors: Tadaaki Hamaguchi, Hiroshi Maruyama, Shigeki Tanaka, Hisao Nishinaka
  • Process of making structured fiber material
    Patent number: 5593525
    Abstract: There is disclosed a structured fiber material with a three-dimensional network structure containing non-elastic crimped short fibers (A) and three-dimensionally crimped composite fibers (B), the fibers (B) being partially interlocked with each other, in which contact portions the fibers (B) are partially heat-bonded with each other; the fibers (B) being partially wound around the fibers (A) at their contact points, in which contact portions the fibers (A) and (B) are partially heat-bonded with each other; and the material having an apparent density of 0.005 to 0.10 g/cm.sup.3. Also disclosed is a process for producing the structured fiber material.
    Type: Grant
    Filed: May 8, 1995
    Date of Patent: January 14, 1997
    Assignee: Toyo Boseki Kabushiki Kaisha
    Inventors: Hideo Isoda, Tadaaki Hamaguchi, Mitsuhiro Sakuda, Yasushi Yamada
  • Structured fiber material comprised of composite fibers coiled around crimped short fibers
    Patent number: 5462793
    Abstract: There is disclosed a structured fiber material with a three-dimensional network structure containing non-elastic crimped short fibers (A) and three-dimensionally crimped composite fibers (B), the fibers (B) being partially interlocked with each other, in which contact portions the fibers (B) are partially heat-bonded with each other; the fibers (B) being partially wound around the fibers (A) at their contact points, in which contact portions the fibers (A) and (B) are partially heat-bonded with each other; and the material having an apparent density of 0.005 to 0.10 g/cm.sup.3. Also disclosed is a process for producing the structured fiber material.
    Type: Grant
    Filed: December 20, 1993
    Date of Patent: October 31, 1995
    Assignee: Toyo Boseki Kabushiki Kaisha
    Inventors: Hideo Isoda, Tadaaki Hamaguchi, Mitsuhiro Sakuda, Yasushi Yamada
  • Recyclable vehicular cushioning material and seat
    Patent number: 5298321
    Abstract: A recyclable vehicular cushioning material which is thermoformed from a web composed of three-dimensionally crimped polyester fiber having a fineness lower than 45 denier per filament and an initial tensile strength (IS) higher than 30 g/d and heat-bonding fiber containing polyester elastomer, as heat-bonding component, which are mixed and dispersed and, if necessary, interlaced, said cushioning material having a layer whose bulk density is 0.02-0.06 g/cm.sup.3.
    Type: Grant
    Filed: July 2, 1992
    Date of Patent: March 29, 1994
    Assignee: Toyo Boseki Kabushiki Kaisha
    Inventors: Hideo Isoda, Mitsuhiro Sakuda, Yoshihiro Amagi, Kenji Tanaka, Kunio Kimura, Michio Kobayashi, Tadaaki Hamaguchi, Seiji Sawahara