Patents by Inventor Noritaka Shibata
Noritaka Shibata 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: 10898862Abstract: This repair method for a hollow fiber membrane module is a method for repairing a leaking section occurring in the hollow fiber membrane module, the repair method having a repair step for using a repair adhesive that hardens due to a composite curing function that comprises a moisture-curing function and a photo-curing function, to repair the leaking section.Type: GrantFiled: June 15, 2012Date of Patent: January 26, 2021Assignee: Mitsubishi Chemical CorporationInventors: Noritaka Shibata, Takashi Hinenoya, Takahiro Mori, Toshinori Tanaka
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Patent number: 10537856Abstract: The invention provides a hollow fiber membrane exhibiting a favorable gas permeation performance and an excellent heat resistance in which the generation of pinholes are suppressed, and a hollow fiber membrane module using the same. The hollow fiber membrane comprising a gas permeable nonporous layer; and a porous supporting layer to support the nonporous layer formed of a thermoplastic elastomer having a DSC melting peak temperature of 130° C. or higher and a rupture elongation prescribed in ISO 37 (2010) of 300% or more.Type: GrantFiled: August 21, 2015Date of Patent: January 21, 2020Assignee: Mitsubishi Chemical CorporationInventors: Noritaka Shibata, Kenjiro Takayanagi
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Publication number: 20170266624Abstract: The invention provides a hollow fiber membrane exhibiting a favorable gas permeation performance and an excellent heat resistance in which the generation of pinholes are suppressed, and a hollow fiber membrane module using the same. The hollow fiber membrane comprising a gas permeable nonporous layer; and a porous supporting layer to support the nonporous layer formed of a thermoplastic elastomer having a DSC melting peak temperature of 130° C. or higher and a rupture elongation prescribed in ISO 37 (2010) of 300% or more.Type: ApplicationFiled: August 21, 2015Publication date: September 21, 2017Applicant: Mitsubishi Rayon Co., Ltd.Inventors: Noritaka SHIBATA, Kenjiro TAKAYANAGI
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Patent number: 9694313Abstract: This composite hollow fiber membrane comprises a non-porous homogeneous layer which is gas-permeable and a porous support layer which supports said homogeneous layer, and is characterized in that the non-porous homogeneous layer is hydrophobic and the polyolefin resin constituting the porous support layer contains a hydrophilic additive. By this means, a composite hollow fiber membrane for use in degassing can be provided that is hydrophilic, has high water vapor permeability, and can solve the problem of gas permeability being reduced due to condensate in the porous substance.Type: GrantFiled: March 29, 2013Date of Patent: July 4, 2017Assignee: Mitsubishi Rayon Co., Ltd.Inventor: Noritaka Shibata
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Patent number: 9694326Abstract: This composite hollow fiber membrane comprises a gas-permeable non-porous homogeneous layer which has a polyolefin resin (A) as the main component and a porous support layer which is made of a polyolefin resin (B) and which supports said non-porous homogeneous layer, and the composite hollow fiber membrane is characterized in that the polyolefin resin (A) of non-porous homogeneous layer is a block copolymer of ethylene units and at least one type of olefin unit selected from ?-olefin units having a carbon number of 3-20. By this means, a gas-permeable composite hollow fiber membrane is provided which has good gas permeability, reduces the impact of condensate on the performance of a gas dissolving module, and has excellent elution properties.Type: GrantFiled: March 29, 2013Date of Patent: July 4, 2017Assignee: Mitsubishi Rayon Co., Ltd.Inventor: Noritaka Shibata
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Patent number: 9120053Abstract: The present invention pertains to a polyolefin-composite hollow-fiber membrane and a manufacturing method for the same, said polyolefin-composite hollow-fiber membrane having: a homogenous membrane layer formed from polyolefins having a metal flow rate measured in accordance with JIS K7210 code D of 1.0 g/10 minutes, or less, and an Mw/Mn ratio of not more than 4.0; and a porous membrane layer which is formed from polyolefins having an Mw/Mn ratio of 8.0-12.0. The present invention also pertains to a hollow-fiber membrane module which is equipped with the polyolefin-composite hollow-fiber membrane.Type: GrantFiled: September 28, 2011Date of Patent: September 1, 2015Assignee: Mitsubishi Rayon Co., Ltd.Inventor: Noritaka Shibata
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Publication number: 20150122129Abstract: This composite hollow fiber membrane comprises a gas-permeable non-porous homogeneous layer which has a polyolefin resin (A) as the main component and a porous support layer which is made of a polyolefin resin (B) and which supports said non-porous homogeneous layer, and the composite hollow fiber membrane is characterized in that the polyolefin resin (A) of non-porous homogeneous layer is a block copolymer of ethylene units and at least one type of olefin unit selected from ?-olefin units having a carbon number of 3-20. By this means, a gas-permeable composite hollow fiber membrane is provided which has good gas permeability, reduces the impact of condensate on the performance of a gas dissolving module, and has excellent elution properties.Type: ApplicationFiled: March 29, 2013Publication date: May 7, 2015Applicant: Mitsubishi Rayon Co., Ltd.Inventor: Noritaka Shibata
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Publication number: 20150059576Abstract: This composite hollow fiber membrane comprises a non-porous homogeneous layer which is gas-permeable and a porous support layer which supports said homogeneous layer, and is characterized in that the non-porous homogeneous layer is hydrophobic and the polyolefin resin constituting the porous support layer contains a hydrophilic additive. By this means, a composite hollow fiber membrane for use in degassing can be provided that is hydrophilic, has high water vapor permeability, and can solve the problem of gas permeability being reduced due to condensate in the porous substance.Type: ApplicationFiled: March 29, 2013Publication date: March 5, 2015Applicant: Mitsubishi Rayon Co., Ltd.Inventor: Noritaka Shibata
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Publication number: 20140216138Abstract: Provided is an inspection method of a hollow fiber membrane module and a repairing method capable of quickly identifying the position of a damaged membrane in the hollow fiber membrane module with a simple configuration.Type: ApplicationFiled: August 31, 2012Publication date: August 7, 2014Applicant: Mitsubishi Rayon Co., Ltd.Inventors: Noritaka Shibata, Takashi Hinenoya
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Publication number: 20140116935Abstract: This repair method for a hollow fiber membrane module is a method for repairing a leaking section occurring in the hollow fiber membrane module, the repair method having a repair step for using a repair adhesive that hardens due to a composite curing function that comprises a moisture-curing function and a photo-curing function, to repair the leaking section.Type: ApplicationFiled: June 15, 2012Publication date: May 1, 2014Applicant: Mitsubishi Rayon Co., Ltd.Inventors: Noritaka Shibata, Takashi Hinenoya, Takahiro Mori, Toshinori Tanaka
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Publication number: 20130255498Abstract: The present invention pertains to a polyolefin-composite hollow-fiber membrane and a manufacturing method for the same, said polyolefin-composite hollow-fiber membrane having: a homogenous membrane layer formed from polyolefins having a metal flow rate measured in accordance with JIS K7210 code D of 1.0 g/10 minutes, or less, and an Mw/Mn ratio of not more than 4.0; and a porous membrane layer which is formed from polyolefins having an Mw/Mn ratio of 8.0-12.0. The present invention also pertains to a hollow-fiber membrane module which is equipped with the polyolefin-composite hollow-fiber membrane.Type: ApplicationFiled: September 28, 2011Publication date: October 3, 2013Applicant: Mitsubishi Rayon Co., Ltd.Inventor: Noritaka Shibata
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Publication number: 20120160765Abstract: A hydrophilizing agent for a hydrophobic porous membrane, wherein the agent contains a surfactant, and the surfactant has a frothability such that the bubble height immediately after frothing, as measured according to the Ross-Miles method (JIS K 3362), using a 0.1 wt % aqueous solution of the surfactant at 25° C., is 40 mm or less, and preferably has a frothability such that the bubble height five minutes after frothing is 20 mm or less; a method for hydrophilizing a hydrophobic porous membrane using this hydrophilizing agent; and a method for testing and hydrophilizing a membrane module using this hydrophilizing agent.Type: ApplicationFiled: March 6, 2012Publication date: June 28, 2012Applicant: Mitsubishi Rayon Co., Ltd.Inventors: Noritaka SHIBATA, Makoto IDEGUCHI, Wataru FUJII
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Publication number: 20110095223Abstract: A hydrophilizing agent for a hydrophobic porous membrane, wherein the agent contains a surfactant, and the surfactant has a frothability such that the bubble height immediately after frothing, as measured according to the Ross-Miles method (JIS K 3362), using a 0.1 wt % aqueous solution of the surfactant at 25° C., is 40 mm or less, and preferably has a frothability such that the bubble height five minutes after frothing is 20 mm or less; a method for hydrophilizing a hydrophobic porous membrane using this hydrophilizing agent; and a method for testing and hydrophilizing a membrane module using this hydrophilizing agent.Type: ApplicationFiled: December 30, 2010Publication date: April 28, 2011Applicant: Mitsubishi Rayon Co., Ltd.Inventors: Noritaka SHIBATA, Makoto IDEGUCHI, Wataru FUJII
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Patent number: 7882962Abstract: A hydrophilizing agent for a hydrophobic porous membrane, wherein the agent contains a surfactant, and the surfactant has a frothability such that the bubble height immediately after frothing, as measured according to the Ross-Miles method (JIS K 3362), using a 0.1 wt % aqueous solution of the surfactant at 25° C., is 40 mm or less, and preferably has a frothability such that the bubble height five minutes after frothing is 20 mm or less; a method for hydrophilizing a hydrophobic porous membrane using this hydrophilizing agent; and a method for testing and hydrophilizing a membrane module using this hydrophilizing agent.Type: GrantFiled: May 9, 2007Date of Patent: February 8, 2011Assignee: Mitsubishi Rayon Co., Ltd.Inventors: Noritaka Shibata, Makoto Ideguchi, Wataru Fujii
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Publication number: 20070209425Abstract: A hydrophilizing agent for a hydrophobic porous membrane, wherein the agent contains a surfactant, and the surfactant has a frothability such that the bubble height immediately after frothing, as measured according to the Ross-Miles method (JIS K 3362), using a 0.1 wt % aqueous solution of the surfactant at 25° C., is 40 mm or less, and preferably has a frothability such that the bubble height five minutes after frothing is 20 mm or less; a method for hydrophilizing a hydrophobic porous membrane using this hydrophilizing agent; and a method for testing and hydrophilizing a membrane module using this hydrophilizing agent.Type: ApplicationFiled: May 9, 2007Publication date: September 13, 2007Applicant: MITSUBISHI RAYON ENGINEERING CO., LTD.Inventors: Noritaka Shibata, Makoto Ideguchi, Wataru Fujii
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Patent number: 5863645Abstract: The present invention is related to a composite microporous polyolefin membrane having a high separation, a high flux and a high strength, comprising a microporous layer, b-layer, providing a reinforcing function, the b-layer being stacked on at least one surface of a microporous layer, a-layer, providing a separate function, wherein micropores in a-layer and b-layer are mutually interconnected inside of the layer and also between layers, thereby forming micropores connected from one surface of the membrane to the other surface thereof, and the ratio of the mean distance Da between microfibril bundles of micropores existing in a-layer to the mean distance Db between microfibril bundles of micropores existing in b-layer is in the range of 1.3.ltoreq.Db/Da.ltoreq.15, and furthermore all of the inner and the outer surfaces of the composite membrane and the surface inside of micropores are coated by a thin film of a hydrophilic copolymer.Type: GrantFiled: June 17, 1996Date of Patent: January 26, 1999Assignee: Mitsubishi Rayon Co., Ltd.Inventors: Kunio Misoo, Kohji Ohbori, Noritaka Shibata