Patents by Inventor Yasuo Hiromoto
Yasuo Hiromoto 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: 9649600Abstract: Disclosed is a method for manufacturing a composite porous film having a stable film quality and a desired hollow shape by controlling the entrance of a film-forming resin solution into a hollow part of a hollow reinforcement support. The method is provided with a step of adhering a film-forming resin solution to the outer peripheral surface of the hollow reinforcement support and thereby forming a film intermediate, a step of adhering a coagulating liquid to the outer peripheral surface of the film intermediate, and a step of flowing the coagulating liquid along the outer peripheral surface of the film intermediate so that at least a part of the outermost interface of the coagulating liquid in the circumferential direction is a free surface and thereby coagulating the film-forming resin solution adhering to the outer peripheral surface of the hollow reinforcement support.Type: GrantFiled: April 23, 2010Date of Patent: May 16, 2017Assignee: Mitsubishi Rayon Co., Ltd.Inventors: Hiroyuki Fujiki, Toshinori Sumi, Yasuo Hiromoto, Masaki Kurashina
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Patent number: 9539547Abstract: A method of manufacturing a porous film includes a decomposition step of introducing a porous film precursor which is formed by coagulating an undiluted film forming solution containing a hydrophilic polymer and a hydrophobic polymer, into a decomposition container; bringing a heated chemical containing an oxidizing agent into contact with the porous film precursor in the decomposition container; warming the porous film precursor in contact with the chemical; and decomposing the hydrophilic polymer remaining inside the porous film precursor using the oxidizing agent. An apparatus for manufacturing a porous film includes a decomposition device provided with the decomposition container.Type: GrantFiled: August 3, 2012Date of Patent: January 10, 2017Assignee: Mitsubishi Rayon Co., Ltd.Inventors: Masaki Kurashina, Toshinori Sumi, Yasuo Hiromoto, Hiroyuki Fujiki
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Publication number: 20160279579Abstract: A hollow fiber membrane-spinning nozzle that spins a hollow fiber membrane having a porous membrane layer and a support is provided in which the nozzle includes a resin flow channel through which a membrane-forming resin solution forming the porous membrane layer flows, the resin flow channel includes a liquid storage section that stores the membrane-forming resin solution and a shaping section that shapes the membrane-forming resin solution in a cylindrical shape and satisfies at least one of conditions (a) to (c): (a) the resin flow channel is disposed to cause the membrane-forming resin solution to branch and merge; (b) a delay means for delaying the flow of the membrane-forming resin solution is disposed in the resin flow channel; and (c) the liquid storage section or the shaping section includes branching and merging means for the membrane-forming resin solution therein.Type: ApplicationFiled: June 14, 2016Publication date: September 29, 2016Applicant: MITSUBISHI RAYON CO., LTD.Inventors: Hiroyuki FUJIKI, Toshinori SUMI, Yasuo HIROMOTO, Osamu MAEHARA, Masahiro TANAKA, Masashi TERAMACHI
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Publication number: 20160038883Abstract: A method of manufacturing a porous film includes a decomposition step of introducing a porous film precursor which is formed by coagulating an undiluted film forming solution containing a hydrophilic polymer and a hydrophobic polymer, into a decomposition container; bringing a heated chemical containing an oxidizing agent into contact with the porous film precursor in the decomposition container; warming the porous film precursor in contact with the chemical; and decomposing the hydrophilic polymer remaining inside the porous film precursor using the oxidizing agent. An apparatus for manufacturing a porous film includes a decomposition device provided with the decomposition container.Type: ApplicationFiled: October 26, 2015Publication date: February 11, 2016Applicant: Mitsubishi Rayon Co., Ltd.Inventors: Masaki KURASHINA, Toshinori SUMI, Yasuo HIROMOTO, Hiroyuki FUJIKI
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Patent number: 9151538Abstract: Disclosed is a drying device for a hollow fiber membrane, including: a tubular drying member that is formed with an opening portion through which a hollow fiber membrane is input and output at at least one end thereof in a length direction, the hollow fiber membrane passing inside the tubular drying member while forming a gap between the hollow fiber membrane and an inner circumferential surface of the tubular drying member; and a gas supply unit that is formed on a side surface of the tubular drying member and supplies a drying gas into the tubular drying member. Thus, it is possible to dry the hollow fiber membrane in a short time at a low cost without the necessity of large equipment.Type: GrantFiled: July 7, 2010Date of Patent: October 6, 2015Assignee: Mitsubishi Rayon Co., Ltd.Inventors: Masaki Kurashina, Toshinori Sumi, Yasuo Hiromoto, Hiroyuki Fujiki
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WASHING DEVICE FOR POROUS HOLLOW FIBER MEMBRANES, AND POROUS HOLLOW FIBER MEMBRANE PRODUCTION METHOD
Publication number: 20150265974Abstract: This disclosure relates to a porous hollow fiber membrane production method that is capable of reducing the concentration of residual substances in membrane retained water and preventing reattachment of a hydrophilic polymer while suppressing the usage amount of a washing liquid. The production method includes a coagulation process of coagulating a membrane forming dope in a coagulating liquid to form a porous hollow fiber membrane, and a hydrophobic polymer removal process to remove hydrophilic polymer that remains in the porous hollow fiber membrane.Type: ApplicationFiled: June 4, 2015Publication date: September 24, 2015Applicant: Mitsubishi Rayon Co., Ltd.Inventors: Masaki KURASHINA, Toshinori Sumi, Hiroyuki Fujiki, Yasuo Hiromoto -
Publication number: 20150042004Abstract: The present invention relates to a device for producing a hollow porous film, the device comprising a spinning nozzle that discharges/shapes a film-forming resin solution dissolved to at least a hydrophobic polymer to a favorable solvent, a processing vessel that houses a processing gas containing a nonsolvent of the hydrophobic polymer and includes a first opening through which the film-forming resin solution discharged/shaped from the spinning nozzle is introduced, and a second opening from which the film-forming resin solution having come into contact with the gas containing the nonsolvent of the hydrophobic polymer is led, a solidification tank which houses a solidification solution and into which the film-forming resin solution led from the second opening is introduced; and gas elimination means for eliminating the processing gas, which flows out of the first opening, from the vicinity of the spinning nozzle.Type: ApplicationFiled: March 14, 2013Publication date: February 12, 2015Applicant: MITSUBISHI RAYON CO., LTD.Inventors: Toshinori Sumi, Hiroyuki Fujiki, Yasuo Hiromoto
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Patent number: 8752713Abstract: A hollow porous membrane with a reduced cost and excellent separation characteristic, water permeability, and mechanical strength and a process of producing the hollow porous membrane with an excellent adhesive property between a support and a porous membrane layer at a low cost are provided. The hollow porous membrane includes a porous membrane layer in which dense layers are disposed in the vicinities of an outer surface and an inner surface. In the process of producing the hollow porous membrane, membrane-forming dopes of a first membrane-forming dope and a second membrane-forming dope, which contain the material of the porous membrane layer and a solvent, are successively applied and stacked onto the outer circumferential surface of a hollow support and the applied membrane-forming dopes are simultaneously coagulated.Type: GrantFiled: May 21, 2009Date of Patent: June 17, 2014Assignee: Mitsubishi Rayon Co., Ltd.Inventors: Masashi Teramachi, Kei Murase, Toshinori Sumi, Yasuo Hiromoto, Hiroyuki Fujiki, Masaki Kurashina, Masakazu Minagawa
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Publication number: 20140163124Abstract: A method of manufacturing a porous film includes a decomposition step of introducing a porous film precursor which is formed by coagulating an undiluted film forming solution containing a hydrophilic polymer and a hydrophobic polymer, into a decomposition container; bringing a heated chemical containing an oxidizing agent into contact with the porous film precursor in the decomposition container; warming the porous film precursor in contact with the chemical; and decomposing the hydrophilic polymer remaining inside the porous film precursor using the oxidizing agent. An apparatus for manufacturing a porous film includes a decomposition device provided with the decomposition container.Type: ApplicationFiled: August 3, 2012Publication date: June 12, 2014Applicant: Mitsubishi Rayon Co., Ltd.Inventors: Masaki Kurashina, Toshinori Sumi, Yasuo Hiromoto, Hiroyuki Fujiki
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Publication number: 20140041699Abstract: The present invention is a device that is for cleaning a porous hollow fiber membrane by running the porous hollow fiber membrane through a cleaning tank containing a cleaning liquid, thus eliminating residual substances in the porous hollow fiber membrane, wherein the inside of the cleaning tank is provided with a duct structure having a hollow fiber membrane running path at which the porous hollow fiber membrane can be continuously run through from an entrance at one end towards an exit at the other end; the duct structure comprises at least two structures that can separate; the duct structure has a running groove, which is formed to at least one structure of the at least two structures, and a branched duct, which pumps or sucks the cleaning fluid to cause the cleaning fluid to flow through; and the branched duct is a duct that is connected to the running groove.Type: ApplicationFiled: April 26, 2012Publication date: February 13, 2014Applicant: Mitsubishi Rayon Co., Ltd.Inventors: Masaki Kurashina, Toshinori Sumi, Hiroyuki Fujiki, Yasuo Hiromoto
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WASHING DEVICE FOR POROUS HOLLOW FIBER MEMBRANES, AND POROUS HOLLOW FIBER MEMBRANE PRODUCTION METHOD
Publication number: 20130307171Abstract: This invention relates to a washing device for a porous hollow fiber membrane, including: n (n is an integer of 2 or greater) washing tanks that contain a washing liquid, through which the porous hollow fiber membrane sequentially passes; and at least one pressure applying unit that pressurizes or de-pressurizes the washing liquid on the outer side of the porous hollow fiber membrane immersed in the washing liquid to force the washing liquid to pass through a membrane part of the porous hollow fiber membrane, in which the pressure applying unit is accommodated in at least one of the first to (n?1)-th washing tanks. According to the invention, it is possible to provide a porous hollow fiber membrane production method that is capable of reducing the concentration of residual substances in membrane retained water and preventing reattachment of a hydrophilic polymer.Type: ApplicationFiled: February 7, 2012Publication date: November 21, 2013Applicant: MITSUBISHI RAYON CO., LTD.Inventors: Masaki Kurashina, Toshinori Sumi, Hiroyuki Fujiki, Yasuo Hiromoto -
Publication number: 20130292860Abstract: A hollow fiber membrane-spinning nozzle that spins a hollow fiber membrane having a porous membrane layer and a support is provided in which the nozzle includes a resin flow channel through which a membrane-forming resin solution forming the porous membrane layer flows, the resin flow channel includes a liquid storage section that stores the membrane-forming resin solution and a shaping section that shapes the membrane-forming resin solution in a cylindrical shape and satisfies at least one of conditions (a) to (c): (a) the resin flow channel is disposed to cause the membrane-forming resin solution to branch and merge; (b) a delay means for delaying the flow of the membrane-forming resin solution is disposed in the resin flow channel; and (c) the liquid storage section or the shaping section includes branching and merging means for the membrane-forming resin solution therein.Type: ApplicationFiled: November 24, 2011Publication date: November 7, 2013Applicant: Mitsubishi Rayon Co., Ltd.Inventors: Hiroyuki Fujiki, Toshinori Sumi, Yasuo Hiromoto, Osamu Maehara, Masahiro Tanaka, Masashi Teramachi
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Publication number: 20130140388Abstract: A tubular storage package which stores a string-like material includes a tubular core rod which is mounted in a center of a bottom of the storage container, the string-like material is a plurality of continuous loop shapes, a storage starting end of the string-like material protrudes, and a winding center of each loop of the plurality of loops is deviated around an axis of the storage container and the loop is laminated.Type: ApplicationFiled: June 7, 2011Publication date: June 6, 2013Applicant: Mitsubishi Rayon Co., Ltd.Inventors: Masaki Kurashina, Yasuo Hiromoto, Toshinori Sumi, Hiroyuki Fujiki
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Publication number: 20130104416Abstract: Disclosed is a drying device for a hollow fiber membrane, including: a tubular drying member that is formed with an opening portion through which a hollow fiber membrane is input and output at at least one end thereof in a length direction, the hollow fiber membrane passing inside the tubular drying member while forming a gap between the hollow fiber membrane and an inner circumferential surface of the tubular drying member; and a gas supply unit that is formed on a side surface of the tubular drying member and supplies a drying gas into the tubular drying member. Thus, it is possible to dry the hollow fiber membrane in a short time at a low cost without the necessity of large equipment.Type: ApplicationFiled: July 7, 2010Publication date: May 2, 2013Applicant: Mitsubishi Rayon Co., Ltd.Inventors: Masaki Kurashina, Toshinori Sumi, Yasuo Hiromoto, Hiroyuki Fujiki
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Publication number: 20120045580Abstract: Disclosed is a method for manufacturing a composite porous film having a stable film quality and a desired hollow shape by controlling the entrance of a film-forming resin solution into a hollow part of a hollow reinforcement support. The method is provided with a step of adhering a film-forming resin solution to the outer peripheral surface of the hollow reinforcement support and thereby forming a film intermediate, a step of adhering a coagulating liquid to the outer peripheral surface of the film intermediate, and a step of flowing the coagulating liquid along the outer peripheral surface of the film intermediate so that at least a part of the outermost interface of the coagulating liquid in the circumferential direction is a free surface and thereby coagulating the film-forming resin solution adhering to the outer peripheral surface of the hollow reinforcement support.Type: ApplicationFiled: April 23, 2010Publication date: February 23, 2012Applicant: MITSUBISHI RAYON CO., LTD,Inventors: Hiroyuki Fujiki, Toshinori Sumi, Yasuo Hiromoto, Masaki Kurashina
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Publication number: 20110114553Abstract: A hollow porous membrane with a reduced cost and excellent separation characteristic, water permeability, and mechanical strength and a process of producing the hollow porous membrane with an excellent adhesive property between a support and a porous membrane layer at a low cost are provided. The hollow porous membrane includes a porous membrane layer in which dense layers are disposed in the vicinities of an outer surface and an inner surface. In the process of producing the hollow porous membrane, membrane-forming dopes of a first membrane-forming dope and a second membrane-forming dope, which contain the material of the porous membrane layer and a solvent, are successively applied and stacked onto the outer circumferential surface of a hollow support and the applied membrane-forming dopes are simultaneously coagulated.Type: ApplicationFiled: May 21, 2009Publication date: May 19, 2011Applicant: Mitsubishi Rayon Co., Ltd.Inventors: Masashi Teramachi, Kei Murase, Toshinori Sumi, Yasuo Hiromoto, Hiroyuki Fujiki, Masaki Kurashina, Masakazu Minagawa
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Patent number: 7754831Abstract: A vinyl-based polymer having a mass average molecular weight of 1500 to 10000, which is prepared by a first step of continuously feeding a material mixture containing a vinyl-based monomer to a continuous tank type first reactor, and polymerizing the vinyl-based monomer under the conditions of a polymerization temperature of 150° to 300° C. and a retention time of 1 to 60 minutes at a rate of polymerization of 50 to 99% to obtain a reaction intermediate mixture; and a second step of feeding a polymerization initiator in the amount of 0.01 to 5 parts by mass based on 100 parts by mass of the vinyl-based monomer and the reaction intermediate mixture to a second reactor, and further polymerizing the vinyl-based monomer under the conditions of a polymerization temperature of 100° to 200° C. and a retention time of 10 to 240 minutes at a rate of polymerization of 80% or more.Type: GrantFiled: December 25, 2002Date of Patent: July 13, 2010Assignee: Mitsubishi Rayon Co., Ltd.Inventors: Yoshihide Nagafuchi, Hirotoshi Mizota, Yasuo Hiromoto, Hisaaki Yoshimura, Yoichi Nagai, Hiroyuki Kumaoka, Takeshi Kato, Tatsuki Yajima
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Publication number: 20070101549Abstract: A fiber array device for arraying fibers three-dimensionally, includes: a fiber winding device onto which a fiber is wound; and a fiber supply device that supplies the fiber to the fiber winding device, wherein the fiber supply device is provided with a movable guide that supplies fiber to the fiber winding device while undergoing relative displacement, and wherein the fiber winding device has a fiber winding bobbin that winds fiber onto its circumference as it rotates around a shaft, and fiber array flat plates a plurality of which are stacked respectively at a plurality of predetermined positions on the circumference of the fiber winding bobbin and on whose respective external surfaces the fibers are arrayed. In addition, there is provided a fiber array jig. It is thereby possible to array fibers three-dimensionally extremely efficiently at a high density and with a high degree of accuracy.Type: ApplicationFiled: May 17, 2004Publication date: May 10, 2007Applicant: Mitsubishi Rayon Co., Ltd.Inventors: Toshinori Sumi, Toshihiko Fukuda, Yasuo Hiromoto
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Publication number: 20070051626Abstract: An electrophoresis apparatus that has a gel retaining layer; one or two sample solution storage portions disposed on either side or both sides of said gel retaning layer; two semi-permeable membranes disposed on the outer sides of said sample solution storage portions; buffer solution storage portions disposed on the outer sides of said semi-permeable membranes; a pair of electrodes disposed on the outer sides of said buffer solution storage portions; and at least one liquid inlet/outlet respectively provided in each of the sample solution storage portions and the buffer solution storage portions.Type: ApplicationFiled: September 27, 2004Publication date: March 8, 2007Inventors: Chiho Itou, Tetsuya Jigami, Teruta Ishimaru, Noriyuki Ogawa, Masakazu Minagawa, Yasuo Hiromoto, Toshinori Sumi
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Publication number: 20060063897Abstract: A vinyl-based polymer having a mass average molecular weight of 1500 to 10000, which is prepared by a first step of continuously feeding a material mixture containing a vinyl-based monomer to a continuous tank type first reactor, and polymerizing the vinyl-based monomer under the conditions of a polymerization temperature of 150° to 300° C. and a retention time of 1 to 60 minutes at a rate of polymerization of 50 to 99% to obtain a reaction intermediate mixture; and a second step of feeding a polymerization initiator in the amount of 0.01 to 5 parts by mass based on 100 parts by mass of the vinyl-based monomer and the reaction intermediate mixture to a second reactor, and further polymerizing the vinyl-based monomer under the conditions of a polymerization temperature of 100° to 200° C. and a retention time of 10 to 240 minutes at a rate of polymerization of 80% or more.Type: ApplicationFiled: December 25, 2002Publication date: March 23, 2006Applicant: Mitsubishi rayon co., Ltd.Inventors: Yoshihide Nagafuchi, Hirotoshi Mizota, Yasuo Hiromoto, Hisaaki Yoshimura, Yoichi Nagai, Hiroyuki Kumaoka, Takeshi Kato, Tatsuki Yajima