Patents by Inventor Shinichi Chaen
Shinichi Chaen 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: 20210260516Abstract: There are provided an air filter medium, a filter pack, and an air filter unit in which the decrease in collection efficiency can be suppressed. The air filter medium includes a fluororesin. The PAO permeability ratio (final permeability/initial permeability) is less than 3.0. The initial permeability is a permeability of polyalphaolefin particles when air containing the polyalphaolefin particles having a number median diameter of 0.25 ?m is passed through the air filter medium at a flow velocity of 5.3 cm/s. The final permeability is a permeability of polyalphaolefin particles when air containing the polyalphaolefin particles having a number median diameter of 0.25 ?m is continuously passed through the air filter medium at a flow velocity of 5.3 cm/s and the pressure loss is increased by 250 Pa.Type: ApplicationFiled: July 12, 2019Publication date: August 26, 2021Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Kunihiko INUI, Satoshi HARA, Yoshiyuki SHIBUYA, Hideyuki KIYOTANI, Shinichi CHAEN, Seigo YAMAMOTO
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Patent number: 11084895Abstract: The present invention aims to provide a modified polytetrafluoroethylene fine powder capable of providing a stretched body having high strength, a small pore size, and excellent homogeneity. The modified polytetrafluoroethylene fine powder of the present invention has non-melt-processability, has a standard specific gravity of 2.155 or lower, includes 0.015 mol % or more of a polymer unit derived from perfluoro(methyl vinyl ether) in all the monomer units, is obtained by emulsion polymerizing tetrafluoroethylene and at least the perfluoro(methyl vinyl ether) in the presence of a fluorosurfactant having a LogPOW value of 3.4 or lower, and has an extrusion pressure of 20.0 MPa or lower.Type: GrantFiled: December 1, 2014Date of Patent: August 10, 2021Assignee: DAIKIN INDUSTRIES, LTD.Inventors: Taku Yamanaka, Makoto Ono, Kohei Yasuda, Masahiko Yamada, Shinichi Chaen, Yasuhiko Sawada, Takahiro Taira, Hirotoshi Yoshida, Taketo Kato
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Patent number: 10944121Abstract: The present invention provides a polymer electrolyte membrane having excellent strength, a small dimensional change, and a low membrane resistance. The polymer electrolyte membrane includes a porous film having pores and a polymer electrolyte contained in the pores. The porous film is obtained by copolymerizing tetrafluoroethylene and an ethylenic comonomer to provide polytetrafluoroethylene and then stretching the polytetrafluoroethylene. The porous film has an average pore size of greater than 0.20 ?m.Type: GrantFiled: December 1, 2014Date of Patent: March 9, 2021Assignees: ASAHI KASEI KABUSHIKI KAISHA, DAIKIN INDUSTRIES, LTD.Inventors: Yuichi Inoue, Kuon Miyazaki, Kentaro Kikuchi, Nobuki Uraoka, Shinichi Chaen, Tomohisa Konishi, Tadashi Ino
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Patent number: 10688448Abstract: The present invention provides a porous body having high strength, a small pore size, and excellent homogeneity. The porous body of the present invention includes polytetrafluoroethylene and has a microstructure that includes nodes and fibrils. The microstructure further includes, in addition to the nodes and the fibrils, fused points where a fibril that links two nodes and another fibril that links another two nodes are fused with each other.Type: GrantFiled: December 1, 2014Date of Patent: June 23, 2020Assignee: DAIKIN INDUSTRIES, LTD.Inventors: Shinichi Chaen, Taku Yamanaka, Kohei Yasuda, Masahiko Yamada, Nobuki Uraoka, Tomohisa Konishi, Kunihiko Inui, Yoshiyuki Shibuya, Makoto Ono
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Patent number: 10644339Abstract: The present invention provides a polymer electrolyte membrane having excellent strength, a small dimensional change, and a low membrane resistance. The polymer electrolyte membrane includes a porous film and a polymer electrolyte. The porous film has a fibril/node area ratio of 90/10 to 75/25.Type: GrantFiled: December 1, 2014Date of Patent: May 5, 2020Assignees: ASAHI KASEI KABUSHIKI KAISHA, DAIKIN INDUSTRIES, LTD.Inventors: Yuichi Inoue, Kuon Miyazaki, Norihito Tanaka, Kentaro Kikuchi, Nobuki Uraoka, Shinichi Chaen, Tomohisa Konishi, Tadashi Ino
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Patent number: 10265661Abstract: A mixed powder and a material for molding have polytetrafluoroethylene as a main component. Each includes polytetrafluoroethylene that can be fibrillated, a non-hot melt processable component that is not fibrillated, and a hot melt processable component with a melting point of lower than 320° C. that is not fibrillated. The non-hot melt processable component that is not fibrillated is contained in a range of 20 to 40% by weight of the total weight. The hot melt processable component is contained at equal to or more than 0.1% by weight but less than 20% by weight of the total weight. A drawn porous body includes a plurality of fibrils, and a plurality of knotted portions that are connected to each other by the fibrils.Type: GrantFiled: June 2, 2017Date of Patent: April 23, 2019Assignee: Daikin Industries, Ltd.Inventors: Shinichi Chaen, Hideyuki Kiyotani, Kunihiko Inui, Taku Yamanaka, Li Bao, Yoshiyuki Shibuya, Seigo Yamamoto, Makoto Kobayashi, Shunji Kasai, Hitoshi Niinuma
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Patent number: 10265654Abstract: A filtering medium includes first and second porous membranes mainly composed of fluororesin, and a plurality of air permeable supports to support the first and second membranes. The second membrane is disposed downstream of the first membrane. When air containing polyalphaolefin particles with a count median diameter of 0.25 ?m is continuously passed through at a flow rate of 5.3 cm/sec and pressure loss is increased by 250 Pa, the first membrane has a dust retention amount larger than the second membrane. The filtering medium has a pressure loss of less than 200 Pa when air is passed through at a flow rate of 5.3 cm/sec. A collecting efficiency of NaCl particles with a particle diameter of 0.3 ?m is 99.97% or more when air containing the NaCl particles is passed through at a flow rate of 5.3 cm/sec. The dust retention amount is 25 g/m2 or more.Type: GrantFiled: March 20, 2015Date of Patent: April 23, 2019Assignee: Daikin Industries, Ltd.Inventors: Yoshiyuki Shibuya, Hideyuki Kiyotani, Kunihiko Inui, Li Bao, Shinichi Chaen, Seigo Yamamoto, Makoto Kobayashi, Hitoshi Niinuma
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Publication number: 20180065094Abstract: A mixed powder and a material for molding have polytetrafluoroethylene as a main component. Each includes polytetrafluoroethylene that can be fibrillated, a non-hot melt processable component that is not fibrillated, and a hot melt processable component with a melting point of lower than 320° C. that is not fibrillated. The non-hot melt processable component that is not fibrillated is contained in a range of 20 to 40% by weight of the total weight. The hot melt processable component is contained at equal to or more than 0.1% by weight but less than 20% by weight of the total weight. A drawn porous body includes a plurality of fibrils, and a plurality of knotted portions that are connected to each other by the fibrils.Type: ApplicationFiled: June 2, 2017Publication date: March 8, 2018Inventors: Shinichi CHAEN, Hideyuki KIYOTANI, Kunihiko INUI, Taku YAMANAKA, Li BAO, Yoshiyuki SHIBUYA, Seigo YAMAMOTO, Makoto KOBAYASHI, Shunji KASAI, Hitoshi NIINUMA
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Patent number: 9707504Abstract: A composition, a mixed powder and a material for molding have polytetrafluoroethylene as a main component. Each includes polytetrafluoroethylene that can be fibrillated, a non-hot melt processable component that is not fibrillated, and a hot melt processable component with a melting point of lower than 320° C. that is not fibrillated. The hot melt processable component is contained at equal to or more than 0.1% by weight but less than 20% by weight of a total weight. A filtering medium for an air filter includes a porous membrane made of these components, and an air permeable support. The porous membrane is manufactured, by mixing these components, extruding the mixture, rolling and drawing.Type: GrantFiled: April 19, 2013Date of Patent: July 18, 2017Assignee: Daikin Industries, Ltd.Inventors: Shinichi Chaen, Hideyuki Kiyotani, Kunihiko Inui, Taku Yamanaka, Li Bao, Yoshiyuki Shibuya, Seigo Yamamoto, Makoto Kobayashi, Shunji Kasai, Hitoshi Niinuma
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Publication number: 20170128876Abstract: A filtering medium includes first and second porous membranes mainly composed of fluororesin, and a plurality of air permeable supports to support the first and second membranes. The second membrane is disposed downstream of the first membrane. When air containing polyalphaolefin particles with a count median diameter of 0.25 ?m is continuously passed through at a flow rate of 5.3 cm/sec and pressure loss is increased by 250 Pa, the first membrane has a dust retention amount larger than the second membrane. The filtering medium has a pressure loss of less than 200 Pa when air is passed through at a flow rate of 5.3 cm/sec. A collecting efficiency of NaCl particles with a particle diameter of 0.3 ?m is 99.97% or more when air containing the NaCl particles is passed through at a flow rate of 5.3 cm/sec. The dust retention amount is 25 g/m2 or more.Type: ApplicationFiled: March 20, 2015Publication date: May 11, 2017Applicant: Daikin Industries, Ltd.Inventors: Yoshiyuki SHIBUYA, Hideyuki KIYOTANI, Kunihiko INUI, Li BAO, Shinichi CHAEN, Seigo YAMAMOTO, Makoto KOBAYASHI, Hitoshi NIINUMA
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Publication number: 20170012313Abstract: The present invention provides a polymer electrolyte membrane having excellent strength, a small dimensional change, and a low membrane resistance. The polymer electrolyte membrane includes a porous film and a polymer electrolyte. The porous film has a fibril/node area ratio of 90/10 to 75/25.Type: ApplicationFiled: December 1, 2014Publication date: January 12, 2017Applicants: ASAHI KASEI E-MATERIALS CORPORATION, DAIKIN INDUSTRIES, LTD.Inventors: Yuichi INOUE, Kuon MIYAZAKI, Norihito TANAKA, Kentaro KIKUCHI, Nobuki URAOKA, Shinichi CHAEN, Tomohisa KONISHI, Tadashi INO
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Publication number: 20170005354Abstract: The present invention provides a polymer electrolyte membrane having excellent strength, a small dimensional change, and a low membrane resistance. The polymer electrolyte membrane includes a porous film having pores and a polymer electrolyte contained in the pores. The porous film is obtained by copolymerizing tetrafluoroethylene and an ethylenic comonomer to provide polytetrafluoroethylene and then stretching the polytetrafluoroethylene. The porous film has an average pore size of greater than 0.20 ?m.Type: ApplicationFiled: December 1, 2014Publication date: January 5, 2017Applicants: ASAHI KASEI E-MATERIALS CORPORATION, DAIKIN INDUSTRIES, LTD.Inventors: Yuichi INOUE, Kuon MIYAZAKI, Kentaro KIKUCHI, Nobuki URAOKA, Shinichi CHAEN, Tomohisa KONISHI, Tadashi INO
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Publication number: 20170001155Abstract: The present invention provides a porous body having high strength, a small pore size, and excellent homogeneity. The porous body of the present invention includes polytetrafluoroethylene and has a microstructure that includes nodes and fibrils. The microstructure further includes, in addition to the nodes and the fibrils, fused points where a fibril that links two nodes and another fibril that links another two nodes are fused with each other.Type: ApplicationFiled: December 1, 2014Publication date: January 5, 2017Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Shinichi CHAEN, Taku YAMANAKA, Kohei YASUDA, Masahiko YAMADA, Nobuki URAOKA, Tomohisa KONISHI, Kunihiko INUI, Yoshiyuki SHIBUYA, Makoto ONO
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Publication number: 20170002156Abstract: The present invention aims to provide a biaxially stretched porous membrane having high strength, a small pore size, and excellent homogeneity. The biaxially stretched porous membrane of the present invention includes polytetrafluoroethylene obtained by copolymerizing tetrafluoroethylene and perfluoro(methyl vinyl ether).Type: ApplicationFiled: December 1, 2014Publication date: January 5, 2017Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Shinichi CHAEN, Taku YAMANAKA, Kohei YASUDA, Masahiko YAMADA, Nobuki URAOKA, Tomohisa KONISHI, Kunihiko INUI, Yoshiyuki SHIBUYA, Makoto ONO
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Publication number: 20160289361Abstract: The present invention aims to provide a modified polytetrafluoroethylene fine powder capable of providing a stretched body having high strength, a small pore size, and excellent homogeneity. The modified polytetrafluoroethylene fine powder of the present invention has non-melt-processability, has a standard specific gravity of 2.155 or lower, includes 0.015 mol % or more of a polymer unit derived from perfluoro(methyl vinyl ether) in all the monomer units, is obtained by emulsion polymerizing tetrafluoroethylene and at least the perfluoro(methyl vinyl ether) in the presence of a fluorosurfactant having a LogPOW value of 3.4 or lower, and has an extrusion pressure of 20.0 MPa or lower.Type: ApplicationFiled: December 1, 2014Publication date: October 6, 2016Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Taku YAMANAKA, Makoto ONO, Kohei YASUDA, Masahiko YAMADA, Shinichi CHAEN, Yasuhiko SAWADA, Takahiro TAIRA, Hirotoshi YOSHIDA, Taketo KATO
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Publication number: 20150200402Abstract: The present invention aims to provide a sheet having high conductivity in the thickness direction and excellent breathability, water repellency, corrosion resistance, and flexibility so as to be suitably used for an electrode of fuel cells and the like. The present invention also aims to provide an electrode and a fuel cell. The present invention provides a sheet containing polytetrafluoroethylene, carbon black, and graphite, the polytetrafluoroethylene having a standard specific gravity of 2.14 to 2.28, a total amount of the carbon black and the graphite being more than 35% by mass of a total amount of the polytetrafluoroethylene, the carbon black, and the graphite.Type: ApplicationFiled: July 8, 2013Publication date: July 16, 2015Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Hiroyuki Yoshimoto, Shinichi Chaen, Kazuya Kawahara, Yoshiyuki Shibuya, Masamichi Sukegawa
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Publication number: 20150082757Abstract: A composition, a mixed power and a material for molding have polytetrafluoroethylene as a main component. Each includes polytetrafluoroethylene that can be fibrillated, a non-hot melt processable component that is not fibrillated, and a hot melt processable component with a melting point of lower than 320° C. that is not fibrillated. The hot melt processable component is contained at equal to or more than 0.1% by weight but less than 20% by weight of a total weight. A filtering medium for an air filter includes a porous membrane made of these components, and an air permeable support. The porous membrane is manufactured, by mixing these components, extruding the mixture, rolling and drawing.Type: ApplicationFiled: April 19, 2013Publication date: March 26, 2015Inventors: Shinichi Chaen, Hideyuki Kiyotani, Kunihiko Inui, Taku Yamanaka, Li Bao, Yoshiyuki Shibuya, Seigo Yamamoto, Makoto Kobayashi, Shunji Kasai, Hitoshi Niinuma
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Patent number: 8937132Abstract: Provided is a material that can be easily biaxially oriented, homogeneously stretched even with a high draw ratio, and formed into a PTFE porous membrane with low pressure loss. The present invention relates to a polytetrafluoroethylene mixture comprising: a fibrillable modified polytetrafluoroethylene; and a fibrillable polytetrafluoroethylene homopolymer, the polytetrafluoroethylene homopolymer having strength at break of 25 N or higher.Type: GrantFiled: December 21, 2011Date of Patent: January 20, 2015Assignee: Daikin Industries, Ltd.Inventors: Yasuhiko Sawada, Shunji Kasai, Taku Yamanaka, Yoshiyuki Shibuya, Kunihiko Inui, Shinichi Chaen
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Patent number: 8865839Abstract: Provided is a material that can be easily biaxially oriented, homogeneously stretched even with a high draw ratio, and formed into a polytetrafluoroethylene porous membrane with low pressure loss. The present invention relates to a polytetrafluoroethylene mixture comprising: a modified polytetrafluoroethylene; and a fibrillable polytetrafluoroethylene homopolymer, the modified polytetrafluoroethylene having an extrusion pressure to a cylinder, at a reduction ratio of 1600, of 70 MPa or higher.Type: GrantFiled: December 21, 2011Date of Patent: October 21, 2014Assignee: Daikin Industries, Ltd.Inventors: Yasuhiko Sawada, Shunji Kasai, Taku Yamanaka, Makoto Ono, Yoshiyuki Shibuya, Kunihiko Inui, Shinichi Chaen
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Publication number: 20130281558Abstract: Provided is a material that can be easily biaxially oriented, homogeneously stretched even with a high draw ratio, and formed into a polytetrafluoroethylene porous membrane with low pressure loss. The present invention relates to a polytetrafluoroethylene mixture comprising: a modified polytetrafluoroethylene; and a fibrillable polytetrafluoroethylene homopolymer, the modified polytetrafluoroethylene having an extrusion pressure to a cylinder, at a reduction ratio of 1600, of 70 MPa or higher.Type: ApplicationFiled: December 21, 2011Publication date: October 24, 2013Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Yasuhiko Sawada, Shunji Kasai, Taku Yamanaka, Makoto Ono, Yoshiyuki Shibuya, Kunihiko Inui, Shinichi Chaen