Patents by Inventor Kazuki IWAMURA

Kazuki IWAMURA 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: 20230265251
    Abstract: The present invention aims to provide an inorganic reinforced polyamide resin composition that achieves incompatible mechanical properties, i.e., high stiffness and impact resistance (high toughness), has excellent flowability, and further has excellent long-term wear resistance (high sliding performance) to an inorganic fiber reinforcing material used as a sliding counterpart material. An inorganic reinforced polyamide resin composition containing: 10 to 55 mass% of a crystalline polyamide resin (A); 1 to 20 mass% of an amorphous polyamide resin (B); 40 to 70 mass% of an inorganic reinforcing material (C); and 0.5 to 10 mass% of a modified polyolefin resin (D) having a reactive functional group that is capable of reacting with a terminal group and/or a main-chain amide group of a polyamide resin, characterized in that a blending mass ratio between the components (A) and (D) satisfies 0.01 ? (D)/(A) ? 0.2, and a blending mass ratio between the components (A) and (B) satisfies 0.05 ? (B)/(A) ? 0.7.
    Type: Application
    Filed: June 24, 2021
    Publication date: August 24, 2023
    Applicant: TOYOBO CO., LTD.
    Inventors: Nobuhiro YOSHIMURA, Kazuki IWAMURA, Yoshitaka AYUZAWA
  • Publication number: 20220251381
    Abstract: Provided is a polyamide resin composition which is used for a foam molded body and has high appearance performance, high load resistance, and high impact resistance. This polyamide resin composition for foam molding contains: 40 to 70 parts by mass of a crystalline polyamide resin (A); 5 to 15 parts by mass of a non-crystalline polyamide resin (B); 15 to 50 parts by mass of an inorganic reinforcing material (C); 0.1 to 10 parts by mass of an elastomer (D); and 0.5 to 15 parts by mass of a copolymer (E) having a functional group that reacts with a terminal group of the polyamide resin. The total amount of the crystalline polyamide resin (A), the non-crystalline polyamide resin (B), the inorganic reinforcing material (C), the elastomer (D), and the copolymer (E) having a functional group that reacts with a terminal group of the polyamide resin is 100 parts by mass.
    Type: Application
    Filed: June 22, 2020
    Publication date: August 11, 2022
    Applicant: TOYOBO CO., LTD.
    Inventors: Kazuki IWAMURA, Nobuhiro YOSHIMURA, Ryo UMEKI
  • Publication number: 20220227995
    Abstract: The present invention provides a polyamide-based resin composition for injection molding suitable for a sliding component required to have excellent moldability, heat resistance stability, abrasion resistance, and sliding stability. The polyamide-based resin composition is a polyamide-based resin composition for injection molding containing a crystalline polyamide resin (A) and a polyester fiber (B) having a liquid crystal skeleton. The crystalline polyamide resin (A) preferably has a melting point of 170° C. or higher, and the polyamide-based resin composition preferably contains 0.1 to 40% by mass of the polyester fiber (B) having a liquid crystal skeleton based on the total mass of the polyamide-based resin composition.
    Type: Application
    Filed: May 14, 2020
    Publication date: July 21, 2022
    Applicant: TOYOBO CO., LTD.
    Inventors: Kazuki IWAMURA, Nobuhiro YOSHIMURA, Motonori TAKITA
  • Publication number: 20210297007
    Abstract: A power conversion apparatus 1 has an inverter for converting DC power into AC power. This control device for the power conversion apparatus includes: a current limiting unit for limiting a target current value to a predetermined limit value or less when the target current value is greater than the limit value; and a control unit for controlling the inverter on the basis of the target current value after the current limiting performed by the current limiting unit.
    Type: Application
    Filed: August 1, 2019
    Publication date: September 23, 2021
    Applicant: YANMAR POWER TECHNOLOGY CO., LTD.
    Inventors: Tomohiro Sawano, Kazuki Iwamura, Shimpei Kitano
  • Patent number: 10934432
    Abstract: Disclosed is a conductive polyamide resin composition that excels not only in electroconductivity, but also in fuel resistance, particularly resistance against alcohol-containing fuel, and further excels in fluidity and moldability, and is capable of yielding a molded article with high impact resistance, the conductive polyamide resin composition including: 84 to 40% by mass of a polyamide resin (A); 5 to 30% by mass of conductive carbon black (B); 3 to 30% by mass of an ethylene-?-olefin copolymer (C) that has a reactive functional group capable of reacting with a terminal group of polyamide resin and/or an amido group on a principal chain of polyamide resin; and 1 to 20% by mass of a conductive polyethylene resin (D).
    Type: Grant
    Filed: February 6, 2018
    Date of Patent: March 2, 2021
    Assignee: TOYOBO CO., LTD.
    Inventors: Shuji Kubota, Nobuhiro Yoshimura, Yuhei Fukumoto, Kazuki Iwamura, Kiyofumi Sakai, Osamu Mabuchi
  • Patent number: 10676616
    Abstract: The polyamide resin composition according to the present invention contains a polyamide resin (A) wherein an average carbon number of an alkylene group between amide groups is 5 or less and a polyamide resin (B) wherein an average carbon number of an alkylene group between amide groups is more than 5, wherein a ratio by mass (A)/(B) of the polyamide resin (A) to the polyamide resin (B) is from 98/2 to 40/60, and wherein, to 100 parts by mass of a total amount of the polyamide resin (A) and the polyamide resin (B), 0.5 to 20 part(s) by mass of a metal cyanide salt of a composition formula (1) (Ax[M(CN)y]) is compounded.
    Type: Grant
    Filed: November 24, 2017
    Date of Patent: June 9, 2020
    Assignee: TOYOBO CO., LTD.
    Inventors: Nobuhiro Yoshimura, Kazuki Iwamura
  • Publication number: 20200010678
    Abstract: Disclosed is a conductive polyamide resin composition that excels not only in electroconductivity, but also in fuel resistance, particularly resistance against alcohol-containing fuel, and further excels in fluidity and moldability, and is capable of yielding a molded article with high impact resistance, the conductive polyamide resin composition including: 84 to 40% by mass of a polyamide resin (A); 5 to 30% by mass of conductive carbon black (B); 3 to 30% by mass of an ethylene-?-olefin copolymer (C) that has a reactive functional group capable of reacting with a terminal group of polyamide resin and/or an amido group on a principal chain of polyamide resin; and 1 to 20% by mass of a conductive polyethylene resin (D).
    Type: Application
    Filed: February 6, 2018
    Publication date: January 9, 2020
    Applicant: TOYOBO CO., LTD.
    Inventors: Shuji KUBOTA, Nobuhiro YOSHIMURA, Yuhei FUKUMOTO, Kazuki IWAMURA, Kiyofumi SAKAI, Osamu MABUCHI
  • Publication number: 20190345331
    Abstract: The polyamide resin composition according to the present invention contains a polyamide resin (A) wherein an average carbon number of an alkylene group between amide groups is 5 or less and a polyamide resin (B) wherein an average carbon number of an alkylene group between amide groups is more than 5, wherein a ratio by mass (A)/(B) of the polyamide resin (A) to the polyamide resin (B) is from 98/2 to 40/60, and wherein, to 100 parts by mass of a total amount of the polyamide resin (A) and the polyamide resin (B), 0.5 to 20 part(s) by mass of a metal cyanide salt of a composition formula (1) (Ax[M(CN)y]) is compounded.
    Type: Application
    Filed: November 24, 2017
    Publication date: November 14, 2019
    Applicant: TOYOBO CO., LTD.
    Inventors: Nobuhiro YOSHIMURA, Kazuki IWAMURA
  • Publication number: 20180222314
    Abstract: Provided is a component used in a fuel feed apparatus (500), containing: a conductive polyamide layer (25) formed of a conductive polyamide resin composition, in which the conductive polyamide resin composition contains: a polyamide resin, a conductive carbon black, an ethylene-?-olefin copolymer, and a conductive polyethylene resin, and satisfies the following characteristics (a) and (b): (a) initial volume resistivity of a flat plate obtained by injection forming is 1×105 ?·cm or less, and volume resistivity after exposing the flat plate to CM15 fuel for 168 hours is 1×107 ?·cm or less, and (b) charpy impact strength at ?40° C. of a test piece obtained by injection forming is 2.0 KJ/m2 or greater.
    Type: Application
    Filed: February 6, 2018
    Publication date: August 9, 2018
    Inventors: Kiyofumi SAKAI, Osamu MABUCHI, Shuji KUBOTA, Nobuhiro YOSHIMURA, Yuhei FUKUMOTO, Kazuki IWAMURA