Patents by Inventor Michinori Fujisawa

Michinori Fujisawa 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: 20200290300
    Abstract: Disclosed is a manufacturing method of a sheet molded article, including the steps of: thermoforming a molding sheet with a first mold, thereby molding a molded article including a body portion provided with a shape transferred from the first mold, and a peripheral edge portion surrounding the body portion; and removing the molded article from the first mold, and inverting the body portion front-to-back.
    Type: Application
    Filed: November 2, 2018
    Publication date: September 17, 2020
    Applicant: KURARAY CO., LTD.
    Inventors: Michinori FUJISAWA, Masato WARITA, Tatsuya DAIMON
  • Publication number: 20200291571
    Abstract: Disclosed is an artificial leather base material having a surface with a lightness L* value of ?50 and including a fiber base material that includes cationic dye-dyeable polyester fibers and an elastic polymer, the artificial leather base material being dyed with at least one cationic dye. Also provided is a resin layer-equipped artificial leather, a napped artificial leather, and a shoe that use the artificial leather base material is used. Also provided is a decorating sheet including the artificial leather base material, and a decorative molded body using the same.
    Type: Application
    Filed: September 13, 2017
    Publication date: September 17, 2020
    Applicant: KURARAY CO., LTD.
    Inventors: Michinori FUJISAWA, Daisuke MATSUDA, Toshiyuki ITO, Yasunori MURATE, Tetsuya ANDO, Masato WARITA, Naoto NARUMOTO
  • Publication number: 20200048828
    Abstract: A leather-like sheet including: a fiber structure including fibers dyed with a dye containing a blue cationic dye having an azo bond; and an elastic polymer applied into internal voids of the fiber structure, wherein the leather-like sheet further includes a polyhydric phenol derivative having anionic properties, or the fiber structure is disclosed. Also disclosed is a fiber structure including fibers dyed with a dye containing a blue cationic dye having an azo bond, or a leather-like sheet including the fiber structure and an elastic polymer applied into internal voids of the fiber structure, wherein the leather-like sheet has a color difference (?E) before and after a moist heat treatment, determined when subjected to the moist heat treatment at 80° C. and a humidity of 90% for 48 hours, of ?E?2.
    Type: Application
    Filed: May 28, 2018
    Publication date: February 13, 2020
    Applicant: KURARAY CO., LTD.
    Inventors: Michinori FUJISAWA, Tetsuya ANDO, Hiroyuki HISHIDA, Yasunori MURATE
  • Patent number: 10465338
    Abstract: A production method of an elastically stretchable artificial leather which includes a step of making microfiberizable fibers into a web; a step of entangling the obtained web to produce an entangled nonwoven fabric; a step of converting the microfiberizable fibers in the nonwoven fabric to microfine fibers, thereby producing a substrate for artificial leather; a step of producing an artificial leather by using the obtained substrate for artificial leather; and a step wherein the obtained artificial leather is brought into close contact with an elastomer sheet stretched in a machine direction by 5 to 40%; the artificial leather is allowed to shrink in the machine direction simultaneously with allowing the elastomer sheet to shrink in the machine direction by relaxing elongation of the elastomer sheet; the artificial leather is heat-treated in shrunk state; and then the artificial leather is peeled off from the elastomer sheet.
    Type: Grant
    Filed: February 26, 2013
    Date of Patent: November 5, 2019
    Assignee: KURARAY CO., LTD.
    Inventors: Michinori Fujisawa, Yukio Maeda, Kazumasa Inoue, Yasutoshi Nomura, Tetsuya Ashida, Hisaichi Watanabe
  • Publication number: 20190323173
    Abstract: Disclosed is a leather-like sheet having a lightness L* of 35 or less, and including a fiber structure including fiber dyed with a dye composition including C.I. Basic Blue 3 and at least one blue cationic dye other than C.I. Basic Blue 3, and an elastic polymer contained in internal voids of the fiber structure, or the fiber structure. Also disclosed is a leather-like sheet having a lightness L* of 35 or less, and including a fiber structure including fiber dyed with an azo-based blue cationic dye, and an elastic polymer contained in internal voids of the fiber structure, wherein the leather-like sheet or the fiber structure has a color difference (?E), determined when treated for 48 hours under moist and hot conditions of 80° C. and a moisture of 90%, of ?E?2.
    Type: Application
    Filed: November 13, 2017
    Publication date: October 24, 2019
    Applicant: KURARAY CO., LTD.
    Inventors: Michinori FUJISAWA, Tetsuya ANDO, Hiroyuki HISHIDA, Yasunori MURATE
  • Publication number: 20190292723
    Abstract: Disclosed herein is a method for producing an elastically stretchable artificial leather, which includes the steps of forming microfiberizable fibers into a web, entangling the obtained web to produce an entangled nonwoven fabric, converting the microfiberizable fibers in the nonwoven fabric to microfine fibers thereby producing a substrate for artificial leather, producing an artificial leather from the obtained substrate for artificial leather, bringing the obtained artificial leather into close contact with an elastomer sheet stretched in a machine direction by 5 to 40%, shrinking the artificial leather in the machine direction simultaneously with the elastomer sheet by relaxing elongation of the elastomer sheet to obtain an artificial leather in shrunk state, heat treating the artificial leather in shrunk state, and then peeling the heat treated artificial leather off from the elastomer sheet.
    Type: Application
    Filed: June 13, 2019
    Publication date: September 26, 2019
    Applicant: Kuraray Co., Ltd.
    Inventors: Michinori Fujisawa, Yukio Maeda, Kazumasa Inoue, Yasutoshi Nomura, Tetsuya Ashida, Hisaichi Watanabe
  • Patent number: 9752260
    Abstract: A substrate for artificial leather comprising a nonwoven fabric of bundles of microfine filaments. The substrate for artificial leather simultaneously satisfies the following requirements 1 to 4: (1) the bundle of microfine filaments comprises 8 to 70 microfine filaments having a cross-sectional shape of nearly circle; (2) the bundle of microfine filaments has a cross-sectional area of 170 to 700 ?m2 and a flatness of 4.0 or less; (3) on a cross section parallel to a thickness direction of the nonwoven fabric body, cross sections of the microfine fiber bundles exist in a density of 1500 to 3000/mm2; and (4) on a cross section parallel to a thickness direction of the nonwoven fabric body, gaps between the microfine fiber bundles have a size of 70 ?m or less. By satisfying the requirements, the substrate for artificial leather combines high level of sensuous qualities and high level of physical properties which have been considered to be mutually exclusive.
    Type: Grant
    Filed: June 25, 2008
    Date of Patent: September 5, 2017
    Assignee: KURARAY CO., LTD.
    Inventors: Michinori Fujisawa, Jiro Tanaka, Norio Makiyama, Yoshiyuki Ando, Yoshiki Nobuto
  • Publication number: 20170211227
    Abstract: A napped leather-like sheet is used that includes a fiber base material including a non-woven fabric of ultrafine fibers and an elastic polymer, wherein the napped leather-like sheet has a surface including a napped region including the ultrafine fibers that have been napped, and a plurality of unnapped regions including the ultrafine fibers that have been thermally welded and laid down, the unnapped regions being surrounded by the napped region and present discontinuously, a total area of the unnapped regions accounts for 5 to 30% of an area of the surface, and Y/X is 0.7 to 1.5, where X represents an average nap length of the napped ultrafine fibers and Y represents an overall average length of averages of widths, orthogonal to a longitudinal direction, of the unnapped regions.
    Type: Application
    Filed: September 17, 2015
    Publication date: July 27, 2017
    Applicant: KURARAY CO., LTD.
    Inventors: Michinori FUJISAWA, Koji HASHIMOTO
  • Patent number: 9334609
    Abstract: A leather-like sheet containing a microfine long-fiber nonwoven fabric containing an entangled web structure made of bundles of microfine long fibers and an elastic polymer impregnated in the microfine long-fiber nonwoven fabric. The leather-like sheet has a machine direction/transverse direction ratio of breaking strength of 1/1 to 1.3/1, an elongation at break in each of the machine direction and the transverse direction of 80% or more, and a machine direction/transverse direction ratio of elongation at break of 1/1 to 1/1.5. The leather-like sheet has a natural dense feeling, a soft hand, a small difference of mechanical properties in the machine direction and the transverse direction, a moderate resistance to elongation and a durable recovery.
    Type: Grant
    Filed: August 28, 2008
    Date of Patent: May 10, 2016
    Assignee: KURARAY CO., LTD.
    Inventors: Masaru Makimura, Hidekazu Andoh, Michinori Fujisawa, Yasunori Murate, Yoshiyuki Ando, Yoshiki Nobuto, Norio Makiyama
  • Publication number: 20160002846
    Abstract: Provided is an artificial leather substrate including: an entangled fiber body; a filler and a non-volatile oil in liquid form added into the entangled fiber body by impregnation; and preferably, an elastic polymer. Preferably, the content of the non-volatile oil is 0.5 to 10 mass % relative to the entangled fiber body. Further preferably, the artificial leather substrate further includes a smoothing layer for smoothing the substrate surface, the smoothing layer being a layer including a second elastic polymer and a second filler and having a thickness of 10 to 100 ?m.
    Type: Application
    Filed: February 25, 2014
    Publication date: January 7, 2016
    Applicant: KURARAY CO., LTD.
    Inventors: Shinichi YOSHIMOTO, Michinori FUJISAWA, Koji HASHIMOTO, Hideo SUGIURA
  • Publication number: 20150050460
    Abstract: A production method of an elastically stretchable artificial leather which includes a step of making microfiberizable fibers into a web; a step of entangling the obtained web to produce an entangled nonwoven fabric; a step of converting the microfiberizable fibers in the nonwoven fabric to microfine fibers, thereby producing a substrate for artificial leather; a step of producing an artificial leather by using the obtained substrate for artificial leather; and a step wherein the obtained artificial leather is brought into close contact with an elastomer sheet stretched in a machine direction by 5 to 40%; the artificial leather is allowed to shrink in the machine direction simultaneously with allowing the elastomer sheet to shrink in the machine direction by relaxing elongation of the elastomer sheet; the artificial leather is heat-treated in shrunk state; and then the artificial leather is peeled off from the elastomer sheet.
    Type: Application
    Filed: February 26, 2013
    Publication date: February 19, 2015
    Applicant: KURARAY CO., LTD.
    Inventors: Michinori Fujisawa, Yukio Maeda, Kazumasa Inoue, Yasutoshi Nomura, Tetsuya Ashida, Hisaichi Watanabe
  • Patent number: 8778126
    Abstract: A method of producing a substrate suitable for artificial leathers. The substrate is composed of an entangled nonwoven fabric made of microfine fibers and a binder resin. At least one surface of the substrate is a densified layer which is made of the microfine fibers and which is substantially free from the binder resin. The binder resin is impregnated into a portion of the substrate other than the densified layer. The densified layer prevents the binder resin impregnated into the entangled nonwoven fabric from migrating into the surface of the entangled nonwoven fabric, thereby providing the substrate having the surface substantially free from the binder resin. The peeling strength between the substrate and a grain layer formed on the surface thereof is drastically improved because the surface of the substrate is substantially free from the binder resin.
    Type: Grant
    Filed: November 2, 2012
    Date of Patent: July 15, 2014
    Assignee: Kuraray Co., Ltd.
    Inventors: Michinori Fujisawa, Jiro Tanaka, Yoshiyuki Ando, Norio Makiyama
  • Publication number: 20130183491
    Abstract: A method for forming a film, containing the following steps (1) to (4), and a film obtained by the method for forming a film: step (1): preparing an aqueous dispersion liquid containing (A) a hydrophilic functional group-containing resin, (B) an ammonium salt, and (C) a nonionic thickener, a mixed amount of the component (B) being from 0.25 to 10 parts by mass per 100 parts by mass of a solid content of the component (A); step (2): coating the aqueous dispersion liquid on at least one surface of a substrate to form a coated film; step (3): subjecting the coated film to a thermal gelation treatment to form a gelled film; and step (4): drying and solidifying the gelled film to form a film.
    Type: Application
    Filed: July 5, 2011
    Publication date: July 18, 2013
    Applicant: KURARAY CO., LTD.
    Inventors: Michinori Fujisawa, Tomoaki Kimura
  • Publication number: 20130055535
    Abstract: A method of producing a substrate suitable for artificial leathers. The substrate is composed of an entangled nonwoven fabric made of microfine fibers and a binder resin. At least one surface of the substrate is a densified layer which is made of the microfine fibers and which is substantially free from the binder resin. The binder resin is impregnated into a portion of the substrate other than the densified layer. The densified layer prevents the binder resin impregnated into the entangled nonwoven fabric from migrating into the surface of the entangled nonwoven fabric, thereby providing the substrate having the surface substantially free from the binder resin. The peeling strength between the substrate and a grain layer formed on the surface thereof is drastically improved because the surface of the substrate is substantially free from the binder resin.
    Type: Application
    Filed: November 2, 2012
    Publication date: March 7, 2013
    Inventors: Michinori FUJISAWA, Jiro Tanaka, Yoshiyuki Ando, Norio Makiyama
  • Patent number: 8133570
    Abstract: The present invention provides a sheet material exhibiting an appearance excellent in three dimensional feel in combination with sufficient abrasion strength of the surface, cushioning property and non-slipping property and advantageously used as the surface material of balls for basketball and the like. The sheet material has a base fabric and a coating layer of a polymer covering the surface of the base fabric, where the coating layer has substantially continuous protrusions and hemispherical depressions formed adjoining the protrusions on a surface, the depressions have a color tone different from a color tone of the protrusion and a gloss brighter than a gloss of the protrusion, a vertical projected area of the depression is 3 to 30 mm2, an average distance between the depressions is 0.5 to 3 mm, and a height difference between the protrusion and the depression is 50 to 1,000 ?m.
    Type: Grant
    Filed: April 1, 2005
    Date of Patent: March 13, 2012
    Assignee: Kuraray Co., Ltd.
    Inventors: Michinori Fujisawa, Sadahiro Ishii
  • Patent number: 8053060
    Abstract: A substrate for artificial leathers which is composed of a nonwoven fabric made of fiber bundles of microfine fibers having an average single fiber fineness of 0.5 dtex or less and an elastic polymer impregnated into the nonwoven fabric. The substrate for artificial leathers satisfies the following requirements 1 and 2: (1) the number of fiber bundles which are oriented to a thickness direction of the nonwoven fabric is 75 to 300 per 1 cm of width which is perpendicular to the thickness direction, when measured on a cross section parallel to the thickness direction; and (2) the number of cross sections of the fiber bundles which are oriented to the thickness direction is 30 to 800 per 1 mm2, when measured on a cross section perpendicular to the thickness direction.
    Type: Grant
    Filed: June 14, 2006
    Date of Patent: November 8, 2011
    Assignee: Kuraray Co., Ltd.
    Inventors: Michinori Fujisawa, Jiro Tanaka, Yoshiyuki Ando
  • Patent number: 7932192
    Abstract: A substrate for artificial leathers, comprising a nonwoven fabric body made of microfine fiber bundles and an elastic polymer impregnated therein. The substrate for artificial leathers simultaneously satisfies the following requirements 1 to 4: (1) each of the microfine fiber bundles contains 6 to 150 bundled microfine long fibers in average; (2) a cross-sectional area of the microfine long fibers constituting the microfine fiber bundles is 27 ?m2 or less, and 80% or more of the microfine long fibers has a cross-sectional area of from 0.9 to 25 ?m2; (3) an average cross-sectional area of the microfine fiber bundles is from 15 to 150 ?m2; and (4) on a cross section parallel to a thickness direction of the nonwoven fabric body, cross sections of the microfine fiber bundles exist in a density of from 1000 to 3000/mm2 in average.
    Type: Grant
    Filed: December 13, 2006
    Date of Patent: April 26, 2011
    Assignee: Kuraray Co., Ltd.
    Inventors: Michinori Fujisawa, Jiro Tanaka, Tsuyoshi Yamasaki, Norio Makiyama, Yoshiyuki Ando
  • Publication number: 20110039055
    Abstract: A substrate for artificial leather comprising a nonwoven fabric of bundles of microfine filaments. The substrate for artificial leather simultaneously satisfies the following requirements 1 to 4: (1) the bundle of microfine filaments comprises 8 to 70 microfine filaments having a cross-sectional shape of nearly circle; (2) the bundle of microfine filaments has a cross-sectional area of 170 to 700 ?m2 and a flatness of 4.0 or less; (3) on a cross section parallel to a thickness direction of the nonwoven fabric body, cross sections of the microfine fiber bundles exist in a density of 1500 to 3000/mm2; and (4) on a cross section parallel to a thickness direction of the nonwoven fabric body, gaps between the microfine fiber bundles have a size of 70 ?m or less. By satisfying the requirements, the substrate for artificial leather combines high level of sensuous qualities and high level of physical properties which have been considered to be mutually exclusive.
    Type: Application
    Filed: June 25, 2008
    Publication date: February 17, 2011
    Applicant: KURARAY CO., LTD.
    Inventors: Michinori Fujisawa, Jiro Tanaka, Norio Makiyama, Yoshiyuki Ando, Yoshiki Nobuto
  • Publication number: 20100239817
    Abstract: A leather-like sheet comprising a microfine long-fiber nonwoven fabric comprising an entangled web structure made of bundles of microfine long fibers and an elastic polymer impregnated in the microfine long-fiber nonwoven fabric. The leather-like sheet has the following features: (1) each of the bundles of microfine long fibers comprises 5 to 70 microfine long fibers having an average single fiber fineness of 0.5 dtex or less; (2) the bundles of microfine long fibers have an average fineness of 3 dtex or less; (3) the entangle web structure comprises superposed webs each comprising the bundles of microfine long fibers; (4) a ratio of the microfine long fibers and the elastic polymer is 70/30 to 40/60 by mass; (5) the elastic polymer is substantially continuous; and (6) a machine direction/transverse direction ratio of breaking strength is 1/1 to 1.
    Type: Application
    Filed: August 28, 2008
    Publication date: September 23, 2010
    Applicant: KURARAY CO., LTD.
    Inventors: Masaru Makimura, Hidekazu Andoh, Michinori Fujisawa, Yasunori Murate, Yoshiyuki Ando, Yoshiki Nobuto, Norio Makiyama
  • Patent number: 7758458
    Abstract: The present invention provides a gas filling-type ball for sports which has excellent non-slip property and sufficient mechanical strength such as surface abrasion resistance, and which can be particularly suitably used in a field of a material for a ball such as a basketball, American football, or rugby ball. The present invention relates to a ball used for any one of basketball, handball, rugby ball, and American football, comprising a sheet having formed thereon a cover layer including substantially continuous pebbles and hemispherical valleys adjoining the pebbles formed on a surface of a base fabric, in which: a height difference between the pebbles and the valleys is 50 to 1,000 ?m, a vertical projected area of each of the adjoining valleys is 3 to 30 mm2, and an average distance between the valleys is 0.5 to 3 mm.
    Type: Grant
    Filed: April 1, 2005
    Date of Patent: July 20, 2010
    Assignees: Kuraray Co., Ltd., Mikasa Corporation
    Inventors: Michinori Fujisawa, Sadahiro Ishii, Taketoshi Saeki