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).
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Patent number: 11926960Abstract: Disclosed is a leather-like sheet having a surface configured such that, when an L* value, a C* value, and an h value under illumination of a D65 light source are represented as L*D65, C*D65, and hD65, and an L* value, a C* value, an h value under illumination of an F10 light source are represented as L*F10, C*F10, and hF10, L*D65 is 30 to 95, and at least one selected from a condition |?C|=|C*F10?C*D65|?7, and a condition |?h°|=|hF10?hD65|?7° is satisfied.Type: GrantFiled: November 15, 2019Date of Patent: March 12, 2024Assignee: KURARAY CO., LTD.Inventors: Masato Warita, Michinori Fujisawa
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Patent number: 11697750Abstract: Disclosed is a polyurethane hot-melt adhesive including: a thermoplastic polyurethane that is a reactant of a raw material including a polymer polyol, a polyisocyanate, and a chain extender, wherein X?Y?15, where X represents a temperature (° C.) at which the polyurethane hot-melt adhesive has a melt viscosity of 2.0×103 Pa·s, and Y represents a temperature at which the polyurethane hot-melt adhesive has a melt viscosity of 1.0×105 Pa·s, and the polyurethane hot-melt adhesive has a 100% modulus of 2.5 MPa or more.Type: GrantFiled: July 24, 2018Date of Patent: July 11, 2023Assignee: KURARAY CO., LTD.Inventors: Masato Warita, Akihisa Iwamoto, Michinori Fujisawa
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Patent number: 11400674Abstract: 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: GrantFiled: November 2, 2018Date of Patent: August 2, 2022Assignee: KURARAY CO., LTD.Inventors: Michinori Fujisawa, Masato Warita, Tatsuya Daimon
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Patent number: 11370202Abstract: A decorative molding sheet including: an artificial leather substrate that includes a non-woven fabric containing ultrafine fibers with an average fineness of 0.001 to 1 dtex and an elastic polymer applied in the non-woven fabric, and that has a leather-like finished surface; and a resin layer that is formed on a back surface of the artificial leather substrate relative to the leather-like finished surface, and that contains a vinyl chloride-vinyl acetate copolymer, and a preform molded body obtained by shaping the decorative molding sheet into a three-dimensional shape are used.Type: GrantFiled: December 19, 2018Date of Patent: June 28, 2022Assignee: KURARAY CO., LTD.Inventors: Daisuke Matsuda, Michinori Fujisawa, Toshiyuki Ito
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Patent number: 11339531Abstract: 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. or the fiber structure.Type: GrantFiled: November 13, 2017Date of Patent: May 24, 2022Assignee: Kuraray Co., Ltd.Inventors: Michinori Fujisawa, Tetsuya Ando, Hiroyuki Hishida, Yasunori Murate
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Patent number: 11268237Abstract: 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: GrantFiled: June 13, 2019Date of Patent: March 8, 2022Assignee: KURARAY CO., LTD.Inventors: Michinori Fujisawa, Yukio Maeda, Kazumasa Inoue, Yasutoshi Nomura, Tetsuya Ashida, Hisaichi Watanabe
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Publication number: 20220064852Abstract: Disclosed is a leather-like sheet having a surface configured such that, when an L* value, a C* value, and an h value under illumination of a D65 light source are represented as L*D65, C*D65, and hD65, and an L* value, a C* value, an h value under illumination of an F10 light source are represented as L*F10, C*F10, and hF10, L*D65 is 30 to 95, and at least one selected from a condition |?C|=|C*F10?C*D65|?7, and a condition |?h°|=|hF10?hD65|?7° is satisfied.Type: ApplicationFiled: November 15, 2019Publication date: March 3, 2022Applicant: KURARAY CO., LTD.Inventors: Masato WARITA, Michinori FUJISAWA
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Publication number: 20220018061Abstract: Disclosed is a colored napped artificial leather including: a fiber-entangled body including ultrafine fibers having an average single fiber fineness of 0.5 dtex or less; and an elastic polymer impregnated into the fiber-entangled body, the napped artificial leather having, at least on one side thereof, a napped surface formed by napping the ultrafine fibers, wherein the napped artificial leather further includes particles of a fatty acid amide-based compound that are at least attached to surfaces of the ultrafine fibers and that have an average particle size of 0.1 to 10 ?m.Type: ApplicationFiled: November 5, 2019Publication date: January 20, 2022Applicant: KURARAY CO., LTD.Inventors: Hiroyuki HISHIDA, Kimio NAKAYAMA, Michinori FUJISAWA, Kazumasa INOUE
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Publication number: 20210130664Abstract: Disclosed is a polyurethane hot-melt adhesive including: a thermoplastic polyurethane that is a reactant of a raw material including a polymer polyol, a polyisocyanate, and a chain extender, wherein X?Y?15, where X represents a temperature (° C.) at which the polyurethane hot-melt adhesive has a melt viscosity of 2.0×103 Pa·s, and Y represents a temperature at which the polyurethane hot-melt adhesive has a melt viscosity of 1.0×105 Pa·s, and the polyurethane hot-melt adhesive has a 100% modulus of 2.5 MPa or more.Type: ApplicationFiled: July 24, 2018Publication date: May 6, 2021Applicant: KURARAY CO., LTD.Inventors: Masato WARITA, Akihisa IWAMOTO, Michinori FUJISAWA
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Publication number: 20210115610Abstract: Disclosed is a printed napped sheet or a printing sheet including a fabric having a napped surface, wherein the napped surface is printed and has, as measured by a surface roughness measurement in accordance with ISO 25178, an arithmetic mean height (Sa) of a predetermined value or less (e.g., 30 ?m or less) in both a grain direction and a reverse grain direction, and the napped surface has a density of peaks (Spd), having a height of 100 ?m or more from a mean height, of a predetermined value or less (e.g., 30/432 mm2 or less) in both the grain direction and the reverse grain direction. Also disclosed is a printed napped sheet wherein the napped surface has a difference (absolute value) in density of peaks (Spd), between the grain direction and the reverse grain direction, of 20/432 mm2 or less.Type: ApplicationFiled: November 14, 2018Publication date: April 22, 2021Applicant: KURARAY CO., LTD.Inventors: Daisuke MATSUDA, Masashi MEGURO, Michinori FUJISAWA
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Publication number: 20210094268Abstract: A decorative molding sheet including: an artificial leather substrate that includes a non-woven fabric containing ultrafine fibers with an average fineness of 0.001 to 1 dtex and an elastic polymer applied in the non-woven fabric, and that has a leather-like finished surface; and a resin layer that is formed on a back surface of the artificial leather substrate relative to the leather-like finished surface, and that contains a vinyl chloride-vinyl acetate copolymer, and a preform molded body obtained by shaping the decorative molding sheet into a three-dimensional shape are used.Type: ApplicationFiled: December 19, 2018Publication date: April 1, 2021Applicant: KURARAY CO., LTD.Inventors: Daisuke Matsuda, Michinori Fujisawa, Toshiyuki Ito
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Publication number: 20200290300Abstract: 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: ApplicationFiled: November 2, 2018Publication date: September 17, 2020Applicant: KURARAY CO., LTD.Inventors: Michinori FUJISAWA, Masato WARITA, Tatsuya DAIMON
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Publication number: 20200291571Abstract: 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: ApplicationFiled: September 13, 2017Publication date: September 17, 2020Applicant: KURARAY CO., LTD.Inventors: Michinori FUJISAWA, Daisuke MATSUDA, Toshiyuki ITO, Yasunori MURATE, Tetsuya ANDO, Masato WARITA, Naoto NARUMOTO
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Publication number: 20200048828Abstract: 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: ApplicationFiled: May 28, 2018Publication date: February 13, 2020Applicant: KURARAY CO., LTD.Inventors: Michinori FUJISAWA, Tetsuya ANDO, Hiroyuki HISHIDA, Yasunori MURATE
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Patent number: 10465338Abstract: 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: GrantFiled: February 26, 2013Date of Patent: November 5, 2019Assignee: KURARAY CO., LTD.Inventors: Michinori Fujisawa, Yukio Maeda, Kazumasa Inoue, Yasutoshi Nomura, Tetsuya Ashida, Hisaichi Watanabe
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Publication number: 20190323173Abstract: 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: ApplicationFiled: November 13, 2017Publication date: October 24, 2019Applicant: KURARAY CO., LTD.Inventors: Michinori FUJISAWA, Tetsuya ANDO, Hiroyuki HISHIDA, Yasunori MURATE
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Publication number: 20190292723Abstract: 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: ApplicationFiled: June 13, 2019Publication date: September 26, 2019Applicant: Kuraray Co., Ltd.Inventors: Michinori Fujisawa, Yukio Maeda, Kazumasa Inoue, Yasutoshi Nomura, Tetsuya Ashida, Hisaichi Watanabe
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Patent number: 9752260Abstract: 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: GrantFiled: June 25, 2008Date of Patent: September 5, 2017Assignee: KURARAY CO., LTD.Inventors: Michinori Fujisawa, Jiro Tanaka, Norio Makiyama, Yoshiyuki Ando, Yoshiki Nobuto
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Publication number: 20170211227Abstract: 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: ApplicationFiled: September 17, 2015Publication date: July 27, 2017Applicant: KURARAY CO., LTD.Inventors: Michinori FUJISAWA, Koji HASHIMOTO
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Patent number: 9334609Abstract: 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: GrantFiled: August 28, 2008Date of Patent: May 10, 2016Assignee: KURARAY CO., LTD.Inventors: Masaru Makimura, Hidekazu Andoh, Michinori Fujisawa, Yasunori Murate, Yoshiyuki Ando, Yoshiki Nobuto, Norio Makiyama