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).
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Publication number: 20230265251Abstract: 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: ApplicationFiled: June 24, 2021Publication date: August 24, 2023Applicant: TOYOBO CO., LTD.Inventors: Nobuhiro YOSHIMURA, Kazuki IWAMURA, Yoshitaka AYUZAWA
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Publication number: 20220251381Abstract: 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: ApplicationFiled: June 22, 2020Publication date: August 11, 2022Applicant: TOYOBO CO., LTD.Inventors: Kazuki IWAMURA, Nobuhiro YOSHIMURA, Ryo UMEKI
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Publication number: 20220227995Abstract: 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: ApplicationFiled: May 14, 2020Publication date: July 21, 2022Applicant: TOYOBO CO., LTD.Inventors: Kazuki IWAMURA, Nobuhiro YOSHIMURA, Motonori TAKITA
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Publication number: 20210297007Abstract: 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: ApplicationFiled: August 1, 2019Publication date: September 23, 2021Applicant: YANMAR POWER TECHNOLOGY CO., LTD.Inventors: Tomohiro Sawano, Kazuki Iwamura, Shimpei Kitano
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Patent number: 10934432Abstract: 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: GrantFiled: February 6, 2018Date of Patent: March 2, 2021Assignee: TOYOBO CO., LTD.Inventors: Shuji Kubota, Nobuhiro Yoshimura, Yuhei Fukumoto, Kazuki Iwamura, Kiyofumi Sakai, Osamu Mabuchi
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Patent number: 10676616Abstract: 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: GrantFiled: November 24, 2017Date of Patent: June 9, 2020Assignee: TOYOBO CO., LTD.Inventors: Nobuhiro Yoshimura, Kazuki Iwamura
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Publication number: 20200010678Abstract: 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: ApplicationFiled: February 6, 2018Publication date: January 9, 2020Applicant: TOYOBO CO., LTD.Inventors: Shuji KUBOTA, Nobuhiro YOSHIMURA, Yuhei FUKUMOTO, Kazuki IWAMURA, Kiyofumi SAKAI, Osamu MABUCHI
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Publication number: 20190345331Abstract: 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: ApplicationFiled: November 24, 2017Publication date: November 14, 2019Applicant: TOYOBO CO., LTD.Inventors: Nobuhiro YOSHIMURA, Kazuki IWAMURA
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Publication number: 20180222314Abstract: 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: ApplicationFiled: February 6, 2018Publication date: August 9, 2018Inventors: Kiyofumi SAKAI, Osamu MABUCHI, Shuji KUBOTA, Nobuhiro YOSHIMURA, Yuhei FUKUMOTO, Kazuki IWAMURA