Patents by Inventor Masato Warita
Masato Warita 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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Publication number: 20240413276Abstract: A leather-like light-emitting display device can include a leather-like sheet that is a laminate of a colored resin layer forming an outer surface layer, and a fiber substrate; a light-emitting portion disposed below the leather-like sheet; and a light-blocking portion configured to partially limit transmission of light, and interposed between any layers from the colored resin layer to the light-emitting portion. The leather-like light-emitting display device is configured to exhibit light-emitting display with a luminance Ya of 200 cd/m2 or less in a non-light emitting region corresponding to the light-blocking portion and a luminance Yb of 100 to 2,000 cd/m2 in a light-emitting region corresponding to a portion other than the light-blocking portion, both as measured from a surface of the colored resin layer, and Yb/Ya being 2.0 or more.Type: ApplicationFiled: October 4, 2022Publication date: December 12, 2024Applicant: Kuraray Co., Ltd.Inventors: Daisuke Matsuda, Masato Warita, Norio Makiyama
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Patent number: 12138891Abstract: A leather-like sheet includes: a fiber base material; an intermediate resin layer stacked on one surface of the fiber base material; and a surface resin layer stacked on the intermediate resin layer. The surface resin layer contains a polyether-based polyurethane and spherical fine particles having a heat resistance at 200° C., and has a content ratio of the spherical fine particles of 5 to 40 mass %. The spherical fine particles have a specific heat of 0.95 kJ/(kg·K) or more, a particle size D50 (median diameter) at a cumulative distribution of 50 vol %, of 2.5 to 10 ?m, and a particle size D10 at a cumulative distribution of 10 vol % of the spherical fine particles which satisfies a condition that a particle size dispersity D50/D10?3.Type: GrantFiled: December 3, 2020Date of Patent: November 12, 2024Assignee: KURARAY CO., LTD.Inventor: Masato Warita
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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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Publication number: 20230340724Abstract: A grain-finished leather-like sheet includes: a fiber base material; a polyurethane skin layer bonded to one surface of the fiber base material; and a polyurethane adhesion layer that bonds the fiber base material and the polyurethane skin layer to each other. The polyurethane adhesion layer includes an aqueous polyurethane as a main component and contains 0.01 to 0.45 mass % in sulfur atoms content, of a sulfate or an alkyl sulfate. The polyurethane adhesion layer exhibits coloration equivalent to pH 4.8 or less that is caused by a BCG (bromocresol green) solution.Type: ApplicationFiled: December 3, 2020Publication date: October 26, 2023Applicant: KURARAY CO., LTD.Inventor: Masato WARITA
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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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Publication number: 20230147237Abstract: A colored resin sheet includes a resin and a colorant dispersed in the resin, and has an average value of visible light transmittances for a red range of a wavelength of 680 to 780 nm, of 50% or more. The colored resin sheet has a combination of a lightness L* value and an average value of light transmittances for an entire visible light range of a wavelength of 380 to 780 nm, respectively, of: a) 15 or less, and 15% or more; b) greater than 15 and less than or equal to 35, and 25% or more; or c) greater than 35 and less than or equal to 60, and 40% or more. A leather-like sheet includes a colored resin layer and a surface having a lightness L* value of 40 or less, and has an average value of visible light transmittances for the red range, of 5% or more.Type: ApplicationFiled: April 1, 2021Publication date: May 11, 2023Applicant: KURARAY CO., LTD.Inventors: Daisuke Matsuda, Masato Warita, Takehiro Sato, Yuta Akagi
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Publication number: 20230033018Abstract: A leather-like sheet includes: a fiber base material; an intermediate resin layer stacked on one surface of the fiber base material; and a surface resin layer stacked on the intermediate resin layer. The surface resin layer contains a polyether-based polyurethane and spherical fine particles having a heat resistance at 200° C., and has a content ratio of the spherical fine particles of 5 to 40 mass %. The spherical fine particles have a specific heat of 0.95 kJ/(kg·K) or more, a particle size D50 (median diameter) at a cumulative distribution of 50 vol %, of 2.5 to 10 ?m, and a particle size D10 at a cumulative distribution of 10 vol % of the spherical fine particles which satisfies a condition that a particle size dispersity D50/D10?3.Type: ApplicationFiled: December 3, 2020Publication date: February 2, 2023Applicant: KURARAY CO., LTD.Inventor: Masato WARITA
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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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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: 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: 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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Patent number: 10689800Abstract: Disclosed is a nubuck-finished leather-like sheet including a non-woven fabric that is an entangled body of ultrafine filaments, wherein the non-woven fabric includes a napped surface having napped fibers formed thereon, and the napped fibers are fixed to an acrylic resin on the napped surface while being laid down. Preferably, the acrylic resin is present so as to retain voids in the napped surface, while being made malleable.Type: GrantFiled: October 27, 2014Date of Patent: June 23, 2020Assignee: KURARAY CO., LTD.Inventors: Yoshiaki Wakimoto, Jiro Tanaka, Masato Warita, Rei Nagayama
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Publication number: 20160251797Abstract: Disclosed is a nubuck-finished leather-like sheet including a non-woven fabric that is an entangled body of ultrafine filaments, wherein the non-woven fabric includes a napped surface having napped fibers formed thereon, and the napped fibers are fixed to an acrylic resin on the napped surface while being laid down. Preferably, the acrylic resin is present so as to retain voids in the napped surface, while being made malleable.Type: ApplicationFiled: October 27, 2014Publication date: September 1, 2016Applicant: KURARAY CO., LTD.Inventors: Yoshiaki WAKIMOTO, Jiro TANAKA, Masato WARITA, Rei NAGAYAMA
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Publication number: 20130022776Abstract: Disclosed is a leather-like sheet including a fiber bundle entangled body which is an entangled body of a fiber bundle of ultrafine filaments. A fiber occupancy (A1) of a superficial layer that is a zone covering ? of the thickness from a front surface of the fiber bundle entangled body, is 36 to 56 vol %. A fiber occupancy (A2) of a bottom layer thereof that is a zone covering ? of the thickness from a back surface, is smaller than the fiber occupancy (A1). A ratio (A1/A2) of the fiber occupancy (A1) to the fiber occupancy (A2) is 1.08 to 1.8.Type: ApplicationFiled: March 23, 2011Publication date: January 24, 2013Applicant: KURARAY CO., LTD.Inventors: Kimio Nakayama, Masato Warita