Patents by Inventor Sayako Arai

Sayako Arai 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).

  • Patent number: 10293599
    Abstract: The present invention discloses a method for producing a decorative article which includes a step of performing inkjet printing onto the surface of a humidity-conditioning base material using an aqueous inkjet ink containing at least water, a water-dispersible resin and a colorant, and also discloses a device for producing the decorative article.
    Type: Grant
    Filed: November 28, 2014
    Date of Patent: May 21, 2019
    Assignee: RISO KAGAKU CORPORATION
    Inventors: Hirotaka Yamamoto, Sayako Arai, Mamoru Saito, Ami Terakado, Akiko Hayashi
  • Patent number: 10066111
    Abstract: Disclosed is an aqueous inkjet ink for a humidity-conditioning base material, the ink comprising at least a colorant, a water-dispersible resin and water, and the water-dispersible resin comprising at least one water-dispersible urethane resin and at least one water-dispersible (meth)acrylic resin or water-dispersible styrene/(meth)acrylic resin.
    Type: Grant
    Filed: April 7, 2016
    Date of Patent: September 4, 2018
    Assignee: RISO KAGAKU CORPORATION
    Inventors: Sayako Arai, Hirotaka Yamamoto, Ami Terakado, Shinji Tabuchi, Yoshihisa Morita
  • Patent number: 10017654
    Abstract: Disclosed is an aqueous inkjet ink for a humidity-conditioning base material, the ink comprising water, a water-dispersible resin, a colorant, and at least one surfactant selected from among acetylene glycol-based surfactants and silicone-based surfactants.
    Type: Grant
    Filed: April 7, 2016
    Date of Patent: July 10, 2018
    Assignee: RISO KAGAKU CORPORATION
    Inventors: Sayako Arai, Hirotaka Yamamoto, Ami Terakado, Shinji Tabuchi, Yoshihisa Morita
  • Patent number: 9951468
    Abstract: An aqueous inkjet ink set for textile printing is disclosed, the aqueous inkjet ink set including two or more aqueous inkjet inks that include a black ink, wherein among the charge density Cd values measured by the streaming potential method for the two or more aqueous inkjet inks, the Cd value (CdK) for the black ink is the highest, and the absolute value of the difference between the Cd value (CdK) for the black ink and the Cd value (Cd2) for the aqueous inkjet ink having the second highest Cd value is 80 ?eq/g or greater. A method for producing a printed item is also disclosed.
    Type: Grant
    Filed: April 7, 2017
    Date of Patent: April 24, 2018
    Assignee: RISO KAGAKU CORPORATION
    Inventors: Sayako Arai, Yuki Urano, Shunsuke Uozumi, Hideki Imanishi, Takahisa Yamazaki
  • Patent number: 9937709
    Abstract: A surface treatment liquid for a porous sound-absorbing material, the surface treatment liquid comprising water and a colorant-fixing component, and the colorant-fixing component comprising at least one component selected from the group consisting of cationic water-dispersible resins, inorganic particles having a median size measured by a dynamic light scattering method of less than 1 ?m, and polyvalent metal salts.
    Type: Grant
    Filed: April 27, 2016
    Date of Patent: April 10, 2018
    Assignee: RISO KAGAKU CORPORATION
    Inventors: Sayako Arai, Hirotaka Yamamoto
  • Publication number: 20170314194
    Abstract: An aqueous inkjet ink set for textile printing is disclosed, the aqueous inkjet ink set including two or more aqueous inkjet inks that include a black ink, wherein among the charge density Cd values measured by the streaming potential method for the two or more aqueous inkjet inks, the Cd value (CdK) for the black ink is the highest, and the absolute value of the difference between the Cd value (CdK) for the black ink and the Cd value (Cd2) for the aqueous inkjet ink having the second highest Cd value is 80 ?eq/g or greater. A method for producing a printed item is also disclosed.
    Type: Application
    Filed: April 7, 2017
    Publication date: November 2, 2017
    Inventors: Sayako ARAI, Yuki URANO, Shunsuke UOZUMI, Hideki IMANISHI, Takahisa YAMAZAKI
  • Publication number: 20160318299
    Abstract: A surface treatment liquid for a porous sound-absorbing material, the surface treatment liquid comprising water and a colorant-fixing component, and the colorant-fixing component comprising at least one component selected from the group consisting of cationic water-dispersible resins, inorganic particles having a median size measured by a dynamic light scattering method of less than 1 ?m, and polyvalent metal salts.
    Type: Application
    Filed: April 27, 2016
    Publication date: November 3, 2016
    Inventors: Sayako ARAI, Hirotaka YAMAMOTO
  • Publication number: 20160319145
    Abstract: Disclosed is an aqueous inkjet ink for a humidity-conditioning base material, the ink comprising water, a water-dispersible resin, a colorant, and at least one surfactant selected from among acetylene glycol-based surfactants and silicone-based surfactants.
    Type: Application
    Filed: April 7, 2016
    Publication date: November 3, 2016
    Inventors: Sayako ARAI, Hirotaka YAMAMOTO, Ami TERAKADO, Shinji TABUCHI, Yoshihisa MORITA
  • Publication number: 20160319142
    Abstract: Disclosed is an aqueous inkjet ink for a humidity-conditioning base material, the ink comprising at least a colorant, a water-dispersible resin and water, and the water-dispersible resin comprising at least one water-dispersible urethane resin and at least one water-dispersible (meth)acrylic resin or water-dispersible styrene/(meth)acrylic resin.
    Type: Application
    Filed: April 7, 2016
    Publication date: November 3, 2016
    Inventors: Sayako ARAI, Hirotaka YAMAMOTO, Ami TERAKADO, Shinji TABUCHI, Yoshihisa MORITA
  • Publication number: 20160229177
    Abstract: The present invention discloses a method for producing a decorative article which includes a step of performing inkjet printing onto the surface of a humidity-conditioning base material using an aqueous inkjet ink containing at least water, a water-dispersible resin and a colorant, and also discloses a device for producing the decorative article.
    Type: Application
    Filed: November 28, 2014
    Publication date: August 11, 2016
    Inventors: Hirotaka YAMAMOTO, Sayako ARAI, Mamoru SAITO, Ami TERAKADO, Akiko HAYASHI
  • Patent number: 8342670
    Abstract: In an inkjet printing system using an ink which includes a coloring material dispersed in a solvent, it is aimed that printing density is improved by thickening the ink on a printing medium so as to stay the coloring material on the surface of the printing medium. An inkjet printing method is provided, in which printing is performed by ejecting one of first and second inks onto a printing medium, and then successively ejecting the other ink so as to overlay it on the one ink, wherein the first ink includes at least a first organic solvent and an ?,?-unsaturated carbonyl compound, the second ink includes at least a second organic solvent and an organic compound reactive as a nucleophile with the ?,?-unsaturated carbonyl compound, and at least one of the first and second inks includes a coloring material.
    Type: Grant
    Filed: August 4, 2009
    Date of Patent: January 1, 2013
    Assignee: Riso Kagaku Corporation
    Inventors: Sayako Arai, Shunsuke Uozumi, Shinichiro Shimura
  • Patent number: 8231722
    Abstract: In an inkjet printing system using an emulsion ink, it is aimed that printing density is improved particularly for a normal paper. An inkjet printing method is provided, in which printing is performed by ejecting one of first and second inks onto a printing medium, and then successively ejecting the other ink so as to overlay it in the one ink, wherein the first ink is a water-in-oil (W/O) emulsion ink comprising the coloring material which is provided with an acidic group on a surface in the water phase, and the second ink is a water-in-oil (W/O) emulsion ink comprising a polyvalent metal salt in the water phase. Preferable acidic group is carboxylic group, sulfuric acid group and phosphoric group. Preferable polyvalent metal salt is a salt composed of metal ions such as Ca++, Cu++, Ni++, Mg++, Zn++, Ba++, Al+++, Fe+++ and Cr+++.
    Type: Grant
    Filed: October 9, 2009
    Date of Patent: July 31, 2012
    Assignee: Riso Kagaku Corporation
    Inventors: Shunsuke Uozumi, Sayako Arai, Shin-ichiro Shimura
  • Publication number: 20110192318
    Abstract: A water-based inkjet ink containing at least water, a low polarity water-soluble organic solvent, a pigment and optionally a basic substance, wherein the water constitutes 60 percent by mass or less of the total quantity of the ink while the water-soluble organic solvent constitutes 15 percent by mass or more of the total quantity of the ink, the pigment includes a self-dispersible pigment that has anionic functional groups on its surface and contains, as counter ions, quaternary ammonium ions represented by the formula (1) wherein R1, R2, R3 and R4 independently represent a substituted or unsubstituted alkyl group.
    Type: Application
    Filed: October 8, 2009
    Publication date: August 11, 2011
    Inventors: Akiko Hayashi, Kohji Nomura, Sayako Arai, Yoshiaki Ishimaru, Ayako Mochizuki, Shunsuke Uozumi
  • Publication number: 20110148980
    Abstract: Pre-treatment solutions are provided, which can improve printing density and prevent bleeding and strike through when printing, particularly inkjet printing is performed with an oil ink on a printing medium that has been treated with the pre-treatment solutions. The pre-treatment-solution can be selected from the following (I), (II) and (III): (I): a pre-treatment solution which comprises at least inorganic particles with an average particle diameter of not less than 1 ?m and not more than 20 ?m and a solvent, in which the difference in solubility parameter (SP value) between the solvent of the pre-treatment solution and the solvent of the oil ink is not less than 1.0 (cal/cm3)1/2; (II): a pre-treatment solution which comprises at least inorganic particles with an average particle diameter of not less than 0.1 ?m and less than 1 ?m and a solvent, in which the difference in solubility parameter (SP value) between the solvent of the pre-treatment solution and the solvent of the oil ink is not less than 2.
    Type: Application
    Filed: December 15, 2010
    Publication date: June 23, 2011
    Applicant: RISO KAGAKU CORPORATION
    Inventors: Sayako ARAI, Ami NAKATA
  • Publication number: 20100136236
    Abstract: Disclosed is an ink set, comprising: a non-aqueous pigment ink comprising a pigment, a non-aqueous solvent, and a non-aqueous resin dispersion microparticle having a pigment dispersion capability, wherein the non-aqueous resin dispersion microparticle is a graft copolymer prepared by introducing urethane groups into a copolymer formed from a monomer mixture comprising an alkyl(meth)acrylate (A) having an alkyl group of 12 or more carbon atoms, a reactive (meth)acrylate (B) having a functional group capable of reacting with an amino group, and a (meth)acrylate (C) having a ?-diketone group or ?-keto ester group by reacting the functional group capable of reacting with an amino group with an amino alcohol and a polyvalent isocyanate compound, and a treatment liquid comprising a compound capable of reacting with the ?-diketone group or ?-keto ester group.
    Type: Application
    Filed: November 12, 2009
    Publication date: June 3, 2010
    Applicant: RISO KAGAKU CORPORATION
    Inventors: Tetsuo Hosoya, Sayako Arai, Shunsuke Uozumi, Yoshifumi Watanabe, Shin-ichiro Shimura, Marie Morinaga
  • Publication number: 20100092676
    Abstract: In an inkjet printing system using an emulsion ink, it is aimed that printing density is improved particularly for a normal paper. An inkjet printing method is provided, in which printing is performed by ejecting one of first and second inks onto a printing medium, and then successively ejecting the other ink so as to overlay it on the one ink, wherein the first ink is a water-in-oil (W/O) emulsion ink comprising the coloring material which is provided with an acidic group on a surface in the water phase, and the second ink is a water-in-oil (W/O) emulsion ink comprising a polyvalent metal salt in the water phase. Preferable acidic group is carboxylic acid group, sulfuric acid group and phosphoric acid group. Preferable polyvalent metal salt is a salt composed of metal ions such as Ca++, Cu++, Ni++, Mg++, Zn++, Ba++, Al+++, Fe+++ and Cr+++.
    Type: Application
    Filed: October 9, 2009
    Publication date: April 15, 2010
    Applicant: RISO KAGAKU CORPORATION
    Inventors: Shunsuke Uozumi, Sayako Arai, Shin-ichiro Shimura
  • Publication number: 20100033524
    Abstract: In an inkjet printing system using an ink which comprises a coloring material dispersed in a solvent, it is aimed that printing density is improved by thickening the ink on a printing medium so as to stay the coloring material on the surface of the printing medium. An inkjet printing method is provided, in which printing is performed by ejecting one of first and second inks onto a printing medium, and then successively ejecting the other ink so as to overlay it on the one ink, wherein the first ink comprises at least a first organic solvent and an ?,?-unsaturated carbonyl compound, the second ink comprises at least a second organic solvent and an organic compound reactive as a nucleophile with the ?,?-unsaturated carbonyl compound, and at least one of the first and second inks comprises a coloring material.
    Type: Application
    Filed: August 4, 2009
    Publication date: February 11, 2010
    Applicant: Riso Kagaku Corporation
    Inventors: Sayako ARAI, Shunsuke UOZUMI, Shinichiro SHIMURA