Patents by Inventor Shohei Kumazawa

Shohei Kumazawa 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: 11608427
    Abstract: The present invention provides a resin composition having high heat-resisting properties, with which a shaping can be performed in accordance with designed sizes using a fused deposition modeling method-3D printer, and from which a shaped object having a small warpage and small changes in sizes due to water can be obtained. The present invention relates to a resin composition for a shaping material of a fused deposition modeling method-3D printer, comprising cellulose fibers in a polyamide.
    Type: Grant
    Filed: October 29, 2018
    Date of Patent: March 21, 2023
    Assignee: UNITIKA LTD.
    Inventors: Miho Nakai, Azusa Usui, Shohei Kumazawa, Shota Noguchi, Fumio Matsuoka, Hiroo Kamikawa
  • Publication number: 20210332240
    Abstract: The present invention provides a resin composition excellent in mechanical properties, stiffness properties, appearance characteristics, flame retardancy and metal corrosion resistance and having a small environmental load, compared to those of conventional polyamide-based flame-retardant resin compositions. The present invention related to a flame-retardant resin composition, comprising: 35 to 85% by mass of a polyamide resin (A); 0.45 to 30% by mass of a cellulose fiber (B) having an average fiber diameter of 10 ?m or less; 4.5 to 40% by mass of metal phosphinate (C); and 0 to 35% by mass of a reinforcing material (D) other than the cellulose fiber.
    Type: Application
    Filed: July 17, 2019
    Publication date: October 28, 2021
    Applicant: UNITIKA LTD.
    Inventors: Miho NAKAI, Shota NOGUCHI, Shohei KUMAZAWA, Hiroo KAMIKAWA
  • Publication number: 20210002478
    Abstract: Provided is a resin composition formodeling materials for fused deposition modeling 3D printers, the resin composition containing a polyarylate resin (A) and a polyester resin (B), containing the component (A) and a polyamide resin (C), or containing tape component (A) and a polycarbonate resin (D).
    Type: Application
    Filed: March 27, 2019
    Publication date: January 7, 2021
    Applicant: UNITIKA LTD.
    Inventors: Azusa Usui, Hiroo Kamikawa, Fumio Matsuoka, Shohei Kumazawa
  • Publication number: 20200362144
    Abstract: The present invention provides a resin composition having high heat-resisting properties, with which a shaping can be performed in accordance with designed sizes using a fused deposition modeling method-3D printer, and from which a shaped object having a small warpage and small changes in sizes due to water can be obtained. The present invention relates to a resin composition for a shaping material of a fused deposition modeling method-3D printer, comprising cellulose fibers in a polyamide.
    Type: Application
    Filed: October 29, 2018
    Publication date: November 19, 2020
    Applicant: UNITIKA LTD.
    Inventors: Miho NAKAI, Azusa USUI, Shohei KUMAZAWA, Shota NOGUCHI, Fumio MATSUOKA, Hiroo KAMIKAWA
  • Publication number: 20200340529
    Abstract: The present invention provides a sliding member which is superior to a conventional polyamide sliding member not only in mechanical properties (especially, flexural property) but also in sliding property. The present invention relates to a sliding member comprising unmodified cellulose fibers or cellulose fibers in which a part of hydroxyl groups from cellulose has been modified with a hydrophilic substituent, which have an average fiber diameter of 10 ?m or less, in an amount of 0.1 to 50 parts by mass with respect to 100 parts by mass of a polyamide resin.
    Type: Application
    Filed: November 14, 2018
    Publication date: October 29, 2020
    Applicant: UNITIKA LTD.
    Inventors: Shota NOGUCHI, Miho NAKAI, Shohei KUMAZAWA, Hiroo KAMIKAWA
  • Patent number: 10221312
    Abstract: Provided is a polyamide resin composition including 0.01 to 50 parts by mass of cellulose fiber in relation to 100 parts by mass of a polyamide resin, having a relative viscosity of 2.3 or more, and having an L-value, an a-value and a b-value in an Lab color space of 20 or more, 10 or less and 20 or less, respectively. The aforementioned polyamide resin composition is obtained by subjecting a polyamide resin composition having a relative viscosity of 2.2 or less to a solid phase polymerization.
    Type: Grant
    Filed: March 2, 2016
    Date of Patent: March 5, 2019
    Assignee: Unitika Ltd.
    Inventors: Miho Nakai, Shohei Kumazawa, Kenji Ikemoto
  • Publication number: 20180022920
    Abstract: Provided is a polyamide resin composition including 0.01 to 50 parts by mass of cellulose fiber in relation to 100 parts by mass of a polyamide resin, having a relative viscosity of 2.3 or more, and having an L-value, an a-value and a b-value in an Lab color space of 20 or more, 10 or less and 20 or less, respectively. The aforementioned polyamide resin composition is obtained by subjecting a polyamide resin composition having a relative viscosity of 2.2 or less to a solid phase polymerization.
    Type: Application
    Filed: March 2, 2016
    Publication date: January 25, 2018
    Applicant: UNITIKA LTD.
    Inventors: Miho Nakai, Shohei Kumazawa, Kenji Ikemoto