Patents by Inventor Koji YACHI

Koji YACHI 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: 11352525
    Abstract: The polyolefin resin foam sheet is a polyolefin resin foam sheet having a plurality of cells in an inside thereof, wherein the 50% compressive strength is 120 kPa or less; the MD elongation percentage is 400% or less; and the TD elongation percentage is 200% or less.
    Type: Grant
    Filed: September 29, 2016
    Date of Patent: June 7, 2022
    Assignee: SEKISUI CHEMICAL CO., LTD.
    Inventors: Kento Nagai, Koji Yachi, Asami Nagai
  • Patent number: 11174331
    Abstract: A shock-absorbing sheet comprises a foamed resin layer having a thickness of 200 ?m or less, a void ratio (P0.1) of a plane directional cross section at a thickness of 0.1 T, a void ratio (P0.5) of a plane directional cross section at a thickness of 0.5 T, and a void ratio (P0.9) of a plane directional cross section at a thickness of 0.9 T from one surface of the foamed resin layer each ranging from 10 to 70 area %; and the standard deviation (P?) for an average void ratio found from the void ratio (P0.1), the void ratio (P0.5) and the void ratio (P0.9) ranging from 1.0 to 20.
    Type: Grant
    Filed: September 28, 2018
    Date of Patent: November 16, 2021
    Assignee: SEKISUI CHEMICAL CO., LTD.
    Inventors: Koji Yachi, Hiroshi Hiraike, Yuuki Hoshiyama, Izumi Okamura, Yasuharu Nagai, Kazuyuki Yahara, Ayaha Oguri
  • Publication number: 20210189032
    Abstract: A shock-absorbing sheet comprises a foamed resin layer having a thickness of 200 ?m or less, a void ratio (P0.1) of a plane directional cross section at a thickness of 0.1 T, a void ratio (P0.5) of a plane directional cross section at a thickness of 0.5 T, and a void ratio (P0.9) of a plane directional cross section at a thickness of 0.9 T from one surface of the foamed resin layer each ranging from 10 to 70 area %; and the standard deviation (P?) for an average void ratio found from the void ratio (P0.1), the void ratio (P0.5) and the void ratio (P0.9) ranging from 1.0 to 20.
    Type: Application
    Filed: September 28, 2018
    Publication date: June 24, 2021
    Applicant: SEKISUI CHEMICAL CO., LTD.
    Inventors: Koji YACHI, Hiroshi HIRAIKE, Yuuki HOSHIYAMA, Izumi OKAMURA, Yasuharu NAGAI, Kazuyuki YAHARA, Ayaha OGURI
  • Publication number: 20210102037
    Abstract: This foam has a 25% compressive strength at 23° C. of 90 kPa or lower and an elongation at break at 160° C., measured in accordance with JIS K6251, of 200% or higher. The present invention makes it possible to provide a foam with which it is possible to obtain a molded article having an exceptional appearance even in secondary processing into a complex shape, without harming the flexibility.
    Type: Application
    Filed: March 30, 2018
    Publication date: April 8, 2021
    Applicant: SEKISUI CHEMICAL CO., LTD.
    Inventors: Hiroshi HIRAIKE, Koji YACHI, Nami NAKAJIMA, Yasuo OOSATO, Atsushi HANDA, Yasunari KUSAKA
  • Patent number: 10174178
    Abstract: There is provided a polyolefin resin foam sheet having a plurality of cells which is formed by foaming a polyolefin resin, wherein, in the polyolefin resin foam sheet, the average cell sizes and the maximum cell sizes in the MD direction and the TD direction are each a predetermined value, and a ratio [TD strength at break/MD average cell size] and a ratio [MD strength at break/TD average cell size] are both 80 kPa/?m or more.
    Type: Grant
    Filed: September 29, 2015
    Date of Patent: January 8, 2019
    Assignee: SEKISUI CHEMICAL CO., LTD.
    Inventors: Shigeki Matsuki, Koji Yachi, Asami Matsumoto
  • Patent number: 10125201
    Abstract: There is provided a polyolefin resin foam sheet having a plurality of cells which is formed by foaming a polyolefin resin composition, wherein the polyolefin resin composition contains a polyolefin resin (A) having relatively high density and a polyolefin resin (B) having relatively low density, and the weighted average resin density of the polyolefin resin (A) and the polyolefin resin (B) is 0.900 g/cm3or less; and wherein a ratio [TD strength at break/MD maximum cell size] and a ratio [MD strength at break/TD maximum cell size] are both 45 kPa/?m or more.
    Type: Grant
    Filed: September 29, 2015
    Date of Patent: November 13, 2018
    Assignee: SEKISUI CHEMICAL CO., LTD.
    Inventors: Koji Yachi, Shigeki Matsuki, Asami Matsumoto
  • Publication number: 20180265743
    Abstract: The polyolefin resin foam sheet is a polyolefin resin foam sheet having a plurality of cells in an inside thereof, wherein the 50% compressive strength is 120 kPa or less; the MD elongation percentage is 400% or less; and the TD elongation percentage is 200% or less.
    Type: Application
    Filed: September 29, 2016
    Publication date: September 20, 2018
    Applicant: SEKISUI CHEMICAL CO., LTD.
    Inventors: Kento NAGAI, Koji YACHI, Asami NAGAI
  • Publication number: 20170292002
    Abstract: There is provided a polyolefin resin foam sheet having a plurality of cells which is formed by foaming a polyolefin resin, wherein, in the polyolefin resin foam sheet, the average cell sizes and the maximum cell sizes in the MD direction and the TD direction are each a predetermined value, and a ratio [TD strength at break/MD average cell size] and a ratio [MD strength at break/TD average cell size] are both 80 kPa/?m or more.
    Type: Application
    Filed: September 29, 2015
    Publication date: October 12, 2017
    Applicant: Sekisui Chemical Co., Ltd.
    Inventors: Shigeki MATSUKI, Koji YACHI, Asami MATSUMOTO
  • Publication number: 20170291968
    Abstract: There is provided a polyolefin resin foam sheet having a plurality of cells which is formed by foaming a polyolefin resin composition, wherein the polyolefin resin composition contains a polyolefin resin (A) having relatively high density and a polyolefin resin (B) having relatively low density, and the weighted average resin density of the polyolefin resin (A) and the polyolefin resin (B) is 0.900 g/cm3 or less; and wherein a ratio [TD strength at break/MD maximum cell size] and a ratio [MD strength at break/TD maximum cell size] are both 45 kPa/?m or more.
    Type: Application
    Filed: September 29, 2015
    Publication date: October 12, 2017
    Applicant: SEKISUI CHEMICAL CO., LTD.
    Inventors: Koji YACHI, Shigeki MATSUKI, Asami MATSUMOTO
  • Publication number: 20160194471
    Abstract: Provided is a crosslinked polyolefin-based resin foam sheet of the present invention having a large number of foam cells, which is obtained by crosslinking and foaming a polyolefin-based resin, and in which the foaming ratio is 1.1 to 2.8 cm3/g, the average cell diameter in the MD of the foam cells is 150 to 250 ?m, the average cell diameter in the CD is 120 to 300 ?m, the ratio of the average cell diameter in the MD to the average cell diameter in the CD (MD/CD) of the foam cells is 0.75 to 1.25, and the ratio of the average cell diameter in the MD to the average cell diameter in the ZD (MD/ZD) is 1.9 to 7.0.
    Type: Application
    Filed: September 29, 2014
    Publication date: July 7, 2016
    Applicant: SEKISUI CHEMICAL CO., LTD.
    Inventors: Koji YACHI, Katsue MASAKI
  • Publication number: 20160053066
    Abstract: A rubber-based resin closed-cell foam comprising a rubber-based resin having an acrylonitrile component content of 30% by mass or more, and carbon black contained in the rubber-based resin portion, the carbon black having a total nitrogen adsorption specific surface area of 600 to 2400 m2 per 100 parts by mass of the rubber-based resin.
    Type: Application
    Filed: March 19, 2014
    Publication date: February 25, 2016
    Applicant: SEKISUI CHEMICAL CO., LTD.
    Inventors: Koji YACHI, Koichi ADACHI