Patents by Inventor Takeshi Tominaga
Takeshi Tominaga 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: 11961683Abstract: A biaxially stretched polypropylene film which has a thickness of from 1.0 ?m to 3.5 ?m, a tensile fracture stress at 135° C. of 70 MPa or more in a first direction, and a difference between the tensile fracture stress at 125° C. in the first direction and the tensile fracture stress at 135° C. in the first direction of from 0 MPa to 15 MPa (inclusive).Type: GrantFiled: August 28, 2019Date of Patent: April 16, 2024Assignee: Oji Holdings CorporationInventors: Yoshimune Okuyama, Takeshi Tominaga, Yoshikazu Fujishiro, Tadakazu Ishiwata
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Publication number: 20230416479Abstract: Provided is a polypropylene film having a high dielectric breakdown strength at high temperatures. Provided is a polypropylene film in which a polypropylene resin constituting the polypropylene film has a molecular-weight distribution (Mw/Mn) of the weight-average molecular weight Mw to the number-average molecular weight Mn of has a Z-average molecular weight Mz of 950,000-1,500,000, and has a weight proportion w of 2.6-4.2% in an integral molecular-weight distribution curve when the logarithmic molecular weight Log(M) is 4.0.Type: ApplicationFiled: November 15, 2021Publication date: December 28, 2023Inventors: Tatsuji ISHIDA, Takeshi TOMINAGA, Tadakazu ISHIWATA
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Patent number: 11342116Abstract: A polypropylene film which has a crystallite size of not more than 12.2 nm, the crystallite size being determined using Scherrer's equation from a full width at half maximum of the reflection peak from (040) plane of ? crystal measured by a wide-angle X-ray diffraction method, and a volume resistivity of not lower than 6×1014 ?·cm, the volume resistivity being calculated in accordance with equation I from a current value that is measured 1 minute after applying a voltage at a potential gradient of 200 V/?m in an environment at 100° C. Equation I: volume resistivity=[(effective electrode area)×(applied voltage)]/[(polypropylene film thickness)×(current value)].Type: GrantFiled: August 1, 2018Date of Patent: May 24, 2022Assignee: Oji Holdings CorporationInventors: Michiko Sueyoshi, Akihiro Kakehi, Takeshi Tominaga, Yoshimune Okuyama
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Patent number: 11142618Abstract: A biaxially stretched polypropylene film including a polypropylene resin and satisfying the following: (a) the crystallite size Sa, which is determined using the Scherrer equation from the full width at half maximum of the ?-crystal (040) plane reflection peak as measured by wide-angle x-ray diffraction after treatment for 200 hours at 105° C., is not more than 12.9 nm; and (b) the planar orientation coefficient ?Pa, which is calculated from the birefringence values ?Nyz and ?Nxz with respect to the thickness direction as determined by optical birefringence measurement after treatment for 200 hours at 105° C., is at least 0.013 (?Pa=(?Nyz+?Nxz)/2).Type: GrantFiled: September 22, 2017Date of Patent: October 12, 2021Assignee: Oji Holdings CorporationInventors: Takeshi Tominaga, Michiko Sueyoshi, Yoshimune Okuyama, Masahiro Nakata, Tadakazu Ishiwata
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Publication number: 20210291427Abstract: A biaxially stretched polypropylene film which has a thickness of from 1.0 ?m to 3.5 ?m, a tensile fracture stress at 135° C. of 70 MPa or more in a first direction, and a difference between the tensile fracture stress at 125° C. in the first direction and the tensile fracture stress at 135° C. in the first direction of from 0 MPa to 15 MPa (inclusive).Type: ApplicationFiled: August 28, 2019Publication date: September 23, 2021Inventors: Yoshimune OKUYAMA, Takeshi TOMINAGA, Yoshikazu FUJISHIRO, Tadakazu ISHIWATA
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Publication number: 20200176188Abstract: A polypropylene film which has a crystallite size of not more than 12.2 nm, the crystallite size being determined using Scherrer's equation from a full width at half maximum of the reflection peak from (040) plane of ? crystal measured by a wide-angle X-ray diffraction method, and a volume resistivity of not lower than 6×1014 ?·cm, the volume resistivity being calculated in accordance with equation I from a current value that is measured 1 minute after applying a voltage at a potential gradient of 200 V/?m in an environment at 100° C. Equation I: volume resistivity=[(effective electrode area)×(applied voltage)]/[(polypropylene film thickness)×(current value)].Type: ApplicationFiled: August 1, 2018Publication date: June 4, 2020Inventors: Michiko SUEYOSHI, Akihiro KAKEHI, Takeshi TOMINAGA, Yoshimune OKUYAMA
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Publication number: 20190315047Abstract: A biaxially oriented polypropylene film containing a polypropylene resin, the film having a thickness of 1.0 to 3.0 ?m, and a molecular orientation coefficient ?Nx of 0.013 to 0.016, as calculated according to ?Nx=(?Nxy+?Nxz)/2 on the basis of a birefringence value ?Nxy in the slow axis direction with respect to the fast axis direction and a birefringence value ?Nxz in the slow axis direction with respect to the thickness direction, as measured via optical birefringence measurement.Type: ApplicationFiled: December 28, 2017Publication date: October 17, 2019Inventors: Takeshi TOMINAGA, Michiko SUEYOSHI, Yoshimune OKUYAMA, Yoshikazu FUJISHIRO, Masahiro NAKATA, Tadakazu ISHIWATA
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Publication number: 20190284354Abstract: A biaxially stretched polypropylene film including a polypropylene resin and satisfying the following: (a) the crystallite size Sa, which is determined using the Scherrer equation from the full width at half maximum of the ?-crystal (040) plane reflection peak as measured by wide-angle x-ray diffraction after treatment for 200 hours at 105° C., is not more than 12.9 nm; and (b) the planar orientation coefficient ?Pa, which is calculated from the birefringence values ?Nyz and ?Nxz with respect to the thickness direction as determined by optical birefringence measurement after treatment for 200 hours at 105° C., is at least 0.013 (?Pa=(?Nyz+?Nxz)/2).Type: ApplicationFiled: September 20, 2017Publication date: September 19, 2019Inventors: Takeshi TOMINAGA, Michiko SUEYOSHI, Yoshimune OKUYAMA, Masahiro NAKATA, Tadakazu ISHIWATA
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Publication number: 20140096561Abstract: According to one embodiment, a sealed compressor is configured to suction a working fluid to a rotary compression mechanism section through a suction pipe extending into an accumulator. The sealed compressor has a relation of Aac/Acy?4, Vac/Vcy?20, and As/Acy?0.12 when an inner diameter cross-sectional area of the accumulator is denoted by Aac (mm2), an inner diameter cross-sectional area of a cylinder chamber is denoted by Acy (mm2), an liquid retaining capacity to an upper end of the suction pipe inside the accumulator is denoted by Vac (cc), a total displacement volume of the rotary compression mechanism section is denoted by Vcy (cc), and a total inner diameter cross-sectional area of an extension portion inside the accumulator of the suction pipe is denoted by As (mm2).Type: ApplicationFiled: December 6, 2013Publication date: April 10, 2014Applicant: TOSHIBA CARRIER CORPORATIONInventors: Takuya HIRAYAMA, Akira MORISHIMA, Hisataka KATO, Takeshi TOMINAGA, Taishi NAGAHATA
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Patent number: 8173746Abstract: A method for producing an olefinic thermoplastic elastomer comprising mixing 100 parts by weight of an olefin copolymer rubber (A) obtained by polymerizing ethylene, an ?-olefin having 3 to 20 carbon atoms and a non-conjugated polyene, and based on 100 parts by weight of the olefin copolymer rubber (A), 11 to 50 parts by weight of a volatile organic solvent (B) and 5 to 150 parts by weight of an olefin resin (C), and removing from the mixture the volatile organic solvent (B) while kneading in an extruder.Type: GrantFiled: December 19, 2007Date of Patent: May 8, 2012Assignee: Sumitomo Chemical Company, LimitedInventors: Kazuyoshi Fuse, Hironobu Shigematsu, Takeshi Tominaga
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Patent number: 8143349Abstract: A method for producing an olefinic thermoplastic elastomer comprising the steps of kneading an olefin copolymer rubber (A) obtained by polymerizing ethylene, an ?-olefin having 3 to 20 carbon atoms and a non-conjugated polyene, a volatile organic solvent (B) and, an olefin resin (C) in an extruder, removing the volatile organic solvent (B) while kneading, then adding a crosslinking agent (E) and further removing the volatile organic solvent (B) while kneading in the extruder to obtain the olefinic thermoplastic elastomer.Type: GrantFiled: December 19, 2007Date of Patent: March 27, 2012Assignee: Sumitomo Chemical Company, LimitedInventors: Kazuyoshi Fuse, Hironobu Shigematsu, Takeshi Tominaga
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Patent number: 7696279Abstract: A process for producing a thermoplastic elastomer composition, which comprises the steps of: (1) supplying at least an olefin copolymer rubber and an olefin resin to a plasticization-kneading zone of a biaxial extruder, which zone has at least two kneading discs forming a tip clearance of 1% or larger and smaller than 10% of an inner diameter of a cylinder in the biaxial extruder, thereby forming a melt-kneaded product; and (2) supplying an organic peroxide to a dynamically cross-linking zone of the biaxial extruder, which zone (i) is located after the plasticization-kneading zone, and (ii) has at least two kneading discs forming a tip clearance of 1% or smaller of the inner diameter of the cylinder in the biaxial extruder, thereby dynamically cross-linking the melt-kneaded product with the organic peroxide.Type: GrantFiled: October 24, 2005Date of Patent: April 13, 2010Assignees: Sumitomo Chemical Company, Limited, The Japan Steel Works, Ltd.Inventors: Takeshi Tominaga, Masamichi Ishibashi, Kanji Idehara, Kenji Tomomitsu
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Publication number: 20100010155Abstract: A method for producing an olefinic thermoplastic elastomer comprising the steps of kneading an olefin copolymer rubber (A) obtained by polymerizing ethylene, an ?-olefin having 3 to 20 carbon atoms and a non-conjugated polyene, a volatile organic solvent (B) and, an olefin resin (C) in an extruder, removing the volatile organic solvent (B) while kneading, then adding a crosslinking agent (E) and further removing the volatile organic solvent (B) while kneading in the extruder to obtain the olefinic thermoplastic elastomer.Type: ApplicationFiled: December 19, 2007Publication date: January 14, 2010Applicant: SUMITOMO CHEMICAL COMPANY , LIMITEDInventors: Kazuyoshi Fuse, Hironobu Shigematsu, Takeshi Tominaga
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Publication number: 20100004400Abstract: A method for producing an olefinic thermoplastic elastomer comprising mixing 100 parts by weight of an olefin copolymer rubber (A) obtained by polymerizing ethylene, an ?-olefin having 3 to 20 carbon atoms and a non-conjugated polyene, and based on 100 parts by weight of the olefin copolymer rubber (A), 11 to 50 parts by weight of a volatile organic solvent (B) and 5 to 150 parts by weight of an olefin resin (C), and removing from the mixture the volatile organic solvent (B) while kneading in an extruder.Type: ApplicationFiled: December 19, 2007Publication date: January 7, 2010Applicant: SUMITOMO CHEMICAL COMPANY, LIMITEDInventors: Kazuyoshi Fuse, Hironobu Shigematsu, Takeshi Tominaga
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Publication number: 20080092586Abstract: There is provided a pressure switching mechanism that switches one compressor mechanism in a sealed-type rotary compressor between regular compression operation and operation stop in accordance with the magnitude of load, and the pressure switching mechanism is equipped with a branch pipe which includes an open/close valve at the middle thereof and which communicates a high-pressure side of a refrigerating cycle to a second suction pipe, an auxiliary suction pipe connected to the suction pipe end part in an accumulator, a check valve which is mounted on either the auxiliary suction pipe or the suction pipe and checks a reverse flow of refrigerant into the accumulator, and a guide pipe which mounts and holds the suction pipe or the auxiliary pipe to the accumulator.Type: ApplicationFiled: July 3, 2007Publication date: April 24, 2008Applicant: TOSHIBA CARRIER CORPORATIONInventors: SHOICHIRO KITAICHI, Toshimasa Aoki, Takeshi Tominaga, Koji Satodate
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Publication number: 20070287804Abstract: The present invention has an object to provide a thermoplastic elastomer composition with a small adhesiveness to calender roll and having a stable drawdown property in a broad temperature range in vacuum forming. The present invention relates to a thermoplastic elastomer composition comprising the following component (A) in an amount of 5 to 94% by weight, the following component (B) in an amount of 1 to 90% by weight and the following component (C) in an amount of 5 to 70% by weight, with the proviso that an amount in total of the components (A), (B) and (C) is set to 100% by weight: (A) an ethylene-?-olefin copolymer rubber; (B) a polypropylene resin which satisfies the following equation (1) in a melt tension (MT) at 190° C. and a melt flow rate (MFR) at 230° C. log MT>?0.9 log MFR+0.Type: ApplicationFiled: June 5, 2007Publication date: December 13, 2007Applicant: SUMITOMO CHEMICAL COMPANY, LIMITEDInventor: Takeshi Tominaga
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Patent number: 7290994Abstract: A vane of a first cylinder is compressed and urged by a spring member. A vane of a second cylinder is compressed and urged corresponding to a differential pressure between an intra-casing pressure guided into a vane chamber and a suction pressure or discharge pressure guided to the cylinder chamber. A pressure shift mechanism which guides the suction pressure or discharge pressure has a branch pipe having a one end connected to a high pressure side of the refrigeration cycle, an other end connected to a suction pipe, and a first on-off valve in a midway portion, and a second on-off valve or a check valve which is provided in the suction pipe on a side upstream of a connection portion of the branch pipe and on a side downstream of an oil returning opening in an accumulator.Type: GrantFiled: December 14, 2005Date of Patent: November 6, 2007Assignee: Toshiba Carrier CorporationInventors: Shoichiro Kitaichi, Norihisa Watanabe, Takeshi Tominaga, Kazu Takashima, Isao Kawabe, Masayuki Suzuki
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Publication number: 20060093494Abstract: A vane of a first cylinder is compressed and urged by a spring member. A vane of a second cylinder is compressed and urged corresponding to a differential pressure between an intra-casing pressure guided into a vane chamber and a suction pressure or discharge pressure guided to the cylinder chamber. A pressure shift mechanism which guides the suction pressure or discharge pressure has a branch pipe having a one end connected to a high pressure side of the refrigeration cycle, an other end connected to a suction pipe, and a first on-off valve in a midway portion, and a second on-off valve or a check valve which is provided in the suction pipe on a side upstream of a connection portion of the branch pipe and on a side downstream of an oil returning opening in an accumulator.Type: ApplicationFiled: December 14, 2005Publication date: May 4, 2006Applicant: TOSHIBA Carrier CorporationInventors: Shoichiro Kitaichi, Norihisa Watanabe, Takeshi Tominaga, Kazu Takashima, Isao Kawabe, Masayuki Suzuki
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Publication number: 20060089459Abstract: A process for producing a thermoplastic elastomer composition, which comprises the steps of: (1) supplying at least an olefin copolymer rubber and an olefin resin to a plasticization-kneading zone of a biaxial extruder, which zone has at least two kneading discs forming a tip clearance of 1% or larger and smaller than 10% of an inner diameter of a cylinder in the biaxial extruder, thereby forming a melt-kneaded product; and (2) supplying an organic peroxide to a dynamically cross-linking zone of the biaxial extruder, which zone (i) is located after the plasticization-kneading zone, and (ii) has at least two kneading discs forming a tip clearance of 1% or smaller of the inner diameter of the cylinder in the biaxial extruder, thereby dynamically cross-linking the melt-kneaded product with the organic peroxide.Type: ApplicationFiled: October 24, 2005Publication date: April 27, 2006Inventors: Takeshi Tominaga, Masamichi Ishibashi, Kanji Idehara, Kenji Tomomitsu
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Patent number: 6441093Abstract: A thermoplastic elastomer composition for calender-molding obtained by dynamically heat-treating a mixture comprising 40 to 95% by weight of (A) an oil-extended olefin copolymer rubber containing 100 parts by weight of an olefin copolymer rubber having a Mooney viscosity (ML1+4100° C.) of 120 to 350 and 20 to 150 parts by weight of mineral oil softening agent and 60 to 5% by weight of (B) a polypropylene resin, a process for producing a calendered sheet from the composition and a sheet obtained by the process.Type: GrantFiled: February 1, 2001Date of Patent: August 27, 2002Assignee: Sumitomo Chemical Company, LimitedInventors: Takeshi Tominaga, Nobuhiro Natsuyama, Hironobu Shigematsu, Tatsuo Hamanaka, Makoto Makino