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).
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Patent number: 11352525Abstract: 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: GrantFiled: September 29, 2016Date of Patent: June 7, 2022Assignee: SEKISUI CHEMICAL CO., LTD.Inventors: Kento Nagai, Koji Yachi, Asami Nagai
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Patent number: 11174331Abstract: 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: GrantFiled: September 28, 2018Date of Patent: November 16, 2021Assignee: SEKISUI CHEMICAL CO., LTD.Inventors: Koji Yachi, Hiroshi Hiraike, Yuuki Hoshiyama, Izumi Okamura, Yasuharu Nagai, Kazuyuki Yahara, Ayaha Oguri
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Publication number: 20210189032Abstract: 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: ApplicationFiled: September 28, 2018Publication date: June 24, 2021Applicant: SEKISUI CHEMICAL CO., LTD.Inventors: Koji YACHI, Hiroshi HIRAIKE, Yuuki HOSHIYAMA, Izumi OKAMURA, Yasuharu NAGAI, Kazuyuki YAHARA, Ayaha OGURI
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Publication number: 20210102037Abstract: 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: ApplicationFiled: March 30, 2018Publication date: April 8, 2021Applicant: SEKISUI CHEMICAL CO., LTD.Inventors: Hiroshi HIRAIKE, Koji YACHI, Nami NAKAJIMA, Yasuo OOSATO, Atsushi HANDA, Yasunari KUSAKA
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Patent number: 10174178Abstract: 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: GrantFiled: September 29, 2015Date of Patent: January 8, 2019Assignee: SEKISUI CHEMICAL CO., LTD.Inventors: Shigeki Matsuki, Koji Yachi, Asami Matsumoto
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Patent number: 10125201Abstract: 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: GrantFiled: September 29, 2015Date of Patent: November 13, 2018Assignee: SEKISUI CHEMICAL CO., LTD.Inventors: Koji Yachi, Shigeki Matsuki, Asami Matsumoto
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Publication number: 20180265743Abstract: 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: ApplicationFiled: September 29, 2016Publication date: September 20, 2018Applicant: SEKISUI CHEMICAL CO., LTD.Inventors: Kento NAGAI, Koji YACHI, Asami NAGAI
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Publication number: 20170292002Abstract: 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: ApplicationFiled: September 29, 2015Publication date: October 12, 2017Applicant: Sekisui Chemical Co., Ltd.Inventors: Shigeki MATSUKI, Koji YACHI, Asami MATSUMOTO
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Publication number: 20170291968Abstract: 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: ApplicationFiled: September 29, 2015Publication date: October 12, 2017Applicant: SEKISUI CHEMICAL CO., LTD.Inventors: Koji YACHI, Shigeki MATSUKI, Asami MATSUMOTO
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Publication number: 20160194471Abstract: 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: ApplicationFiled: September 29, 2014Publication date: July 7, 2016Applicant: SEKISUI CHEMICAL CO., LTD.Inventors: Koji YACHI, Katsue MASAKI
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Publication number: 20160053066Abstract: 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: ApplicationFiled: March 19, 2014Publication date: February 25, 2016Applicant: SEKISUI CHEMICAL CO., LTD.Inventors: Koji YACHI, Koichi ADACHI