Patents by Inventor Katsuhiko Shinada
Katsuhiko Shinada 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: 20170348644Abstract: A method for manufacturing a hollow fiber membrane has a spinning step of applying a first membrane forming stock solution and a second membrane forming stock solution for forming a porous membrane layer to the outer peripheral surface of a hollow porous base material using a nozzle for hollow fiber membrane spinning and solidifying these membrane forming stock solutions, wherein a draft ratio (VB/VA), which is the ratio of feed velocity VB for hollow porous base material fed out from a base material feed opening to linear velocity VA for the first membrane forming stock solution and the second membrane forming stock solution discharged from a membrane forming stock solution discharge opening of the nozzle for hollow fiber membrane spinning, is set to 1-6.Type: ApplicationFiled: September 3, 2015Publication date: December 7, 2017Applicant: Mitsubishi Chemical CorporationInventors: Masahiko MIZUTA, Katsuhiko SHINADA, Toshinori SUMI
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Patent number: 9702623Abstract: The purpose of the present invention is to provide a drying device capable of preventing entanglement of a hollow fiber membrane in a drying chamber and preventing diameter reduction and flattening of the hollow fiber membrane. This drying device includes the drying chamber having a heating means disposed therein, a guide roll that causes at least two hollow fiber membranes (A) to travel inside the drying chamber, and at least two winding bobbins disposed outside the drying chamber. The drying device simultaneously dries at least two hollow fiber membranes (A) in the drying chamber while winding one hollow fiber membrane (A) on one winding bobbin. A rotation speed control means is attached separately to each of the at least two winding bobbins.Type: GrantFiled: April 25, 2012Date of Patent: July 11, 2017Assignee: Mitsubishi Chemical CorporationInventor: Katsuhiko Shinada
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Patent number: 9296886Abstract: A method for dissolving and degassing a polymer is described, including a dissolution/degassing step. In the dissolution/degassing step, a mixture containing the polymer and a solvent is agitated, in a pressure-reduced condition with a gauge pressure of ?50 to ?90 kPa and at a temperature lower than the boiling point of the solvent in the pressure-reduced condition but higher than the freezing point of the same, to dissolve the polymer and simultaneously degas the polymer solution, so as to obtain a polymer solution.Type: GrantFiled: April 19, 2012Date of Patent: March 29, 2016Assignee: MITSUBISHI RAYON CO., LTD.Inventors: Katsuhiko Shinada, Masahiko Mizuta
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Patent number: 9073728Abstract: An automatic winding device for a filamentous material which is an automatic winding device for a filamentous material that winds a plurality of provided filamentous materials simultaneously onto a plurality of bobbins; and an automatic winding method utilizing the automatic winding device are provided. The automatic winding device includes a plurality of spindles for winding bobbins and a guide roll. The number of the plurality of spindles is 1-1.75 times the number of thread handling routes.Type: GrantFiled: April 25, 2012Date of Patent: July 7, 2015Assignee: MITSUBISHI RAYON CO., LTD.Inventor: Katsuhiko Shinada
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Publication number: 20140128517Abstract: A method for dissolving and degassing a polymer is described, including a dissolution/degassing step. In the dissolution/degassing step, a mixture containing the polymer and a solvent is agitated, in a pressure-reduced condition with a gauge pressure of ?50 to ?90 kPa and at a temperature lower than the boiling point of the solvent in the pressure-reduced condition but higher than the freezing point of the same, to dissolve the polymer and simultaneously degas the polymer solution, so as to obtain a polymer solution.Type: ApplicationFiled: April 19, 2012Publication date: May 8, 2014Applicant: MITSUBISHI RAYON CO., LTD.Inventors: Katsuhiko Shinada, Masahiko Mizuta
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Publication number: 20140054813Abstract: A method for producing a porous film is described, including a solidification step for solidifying a film-forming starting solution in a solidification solution. In the method, the temperature of the solidification solution used in the solidification step is controlled by transferring the solidification solution, which is temperature-controlled by a temperature control means, to a solidification means for solidifying the film-forming starting solution. An apparatus for executing the method is also described. The method and apparatus for producing a porous film are capable of stably controlling the temperature of the solidification solution to control the fluctuation in the quality of the obtained porous film. In addition, an apparatus for producing a porous film, which is capable of producing a hollow-fiber film without causing defects thereto, is also described.Type: ApplicationFiled: April 20, 2012Publication date: February 27, 2014Applicant: MITSUBISHI RAYON CO., LTD.Inventor: Katsuhiko Shinada
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Publication number: 20140048641Abstract: An automatic winding device for a filamentous material which is an automatic winding device for a filamentous material that winds a plurality of provided filamentous materials simultaneously onto a plurality of bobbins; and an automatic winding method utilizing the automatic winding device are provided. The automatic winding device includes a plurality of spindles for winding bobbins and a guide roll. The number of the plurality of spindles is 1-1.75 times the number of thread handling routes.Type: ApplicationFiled: April 25, 2012Publication date: February 20, 2014Applicant: MITSUBISHI RAYON CO., LTD.Inventor: Katsuhiko Shinada
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Publication number: 20140047728Abstract: The purpose of the present invention is to provide a drying device capable of preventing entanglement of a hollow fiber membrane in a drying chamber and preventing diameter reduction and flattening of the hollow fiber membrane. This drying device includes the drying chamber having a heating means disposed therein, a guide roll that causes at least two hollow fiber membranes (A) to travel inside the drying chamber, and at least two winding bobbins disposed outside the drying chamber. The drying device simultaneously dries at least two hollow fiber membranes (A) in the drying chamber while winding one hollow fiber membrane (A) on one winding bobbin. A rotation speed control means is attached separately to each of the at least two winding bobbins.Type: ApplicationFiled: April 25, 2012Publication date: February 20, 2014Applicant: MITSUBISHI RAYON CO., LTD.Inventor: Katsuhiko Shinada
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Patent number: 7807221Abstract: An object of the present invention is to provide a composite porous membrane, which has not only excellent filtration capacity, but also excellent adhesion between a porous membrane and a braid and mechanical properties, and a method for producing the composite porous membrane. The present invention relates to a composite porous membrane comprising a braid, and a membrane material; wherein the membrane material comprises a first porous layer comprising a dense layer which is arranged on the outer surface of the braid, and a second porous layer comprising a dense layer which is arranged on the first porous layer, and a method for producing the composite porous membrane.Type: GrantFiled: June 21, 2007Date of Patent: October 5, 2010Assignee: Mitsubishi Rayon Co., Ltd.Inventors: Katsuhiko Shinada, Kei Murase, Teruyuki Yamada, Yuuichi Shirasu, Masahiko Mizuta, Hiroyuki Fujiki
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Patent number: 7562778Abstract: An object of the present invention is to provide a composite porous membrane, which has not only excellent filtration capacity, but also excellent adhesion between a porous membrane and a braid and mechanical properties, and a method for producing the composite porous membrane. The present invention relates to a composite porous membrane comprising a braid, and a membrane material; wherein the membrane material comprises a first porous layer comprising a dense layer which is arranged on the outer surface of the braid, and a second porous layer comprising a dense layer which is arranged on the first porous layer, and a method for producing the composite porous membrane.Type: GrantFiled: July 11, 2007Date of Patent: July 21, 2009Assignee: Mitsubishi Rayon Co., Ltd.Inventors: Katsuhiko Shinada, Kei Murase, Teruyuki Yamada, Yuuichi Shirasu, Masahiko Mizuta, Hiroyuki Fujiki
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Patent number: 7306105Abstract: An object of the present invention is to provide a composite porous membrane, which has not only excellent filtration capacity, but also excellent adhesion between a porous membrane and a braid and mechanical properties, and a method for producing the composite porous membrane. The present invention relates to a composite porous membrane comprising a braid, and a membrane material; wherein the membrane material comprises a first porous layer comprising a dense layer which is arranged on the outer surface of the braid, and a second porous layer comprising a dense layer which is arranged on the first porous layer, and a method for producing the composite porous membrane.Type: GrantFiled: May 10, 2005Date of Patent: December 11, 2007Assignee: Mitsubishi Rayon Co., Ltd.Inventors: Katsuhiko Shinada, Kei Murase, Teruyuki Yamada, Yuuichi Shirasu, Masahiko Mizuta, Hiroyuki Fujiki
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Publication number: 20070262017Abstract: An object of the present invention is to provide a composite porous membrane, which has not only excellent filtration capacity, but also excellent adhesion between a porous membrane and a braid and mechanical properties, and a method for producing the composite porous membrane. The present invention relates to a composite porous membrane comprising a braid, and a membrane material; wherein the membrane material comprises a first porous layer comprising a dense layer which is arranged on the outer surface of the braid, and a second porous layer comprising a dense layer which is arranged on the first porous layer, and a method for producing the composite porous membrane.Type: ApplicationFiled: July 11, 2007Publication date: November 15, 2007Applicant: Mitsubishi Rayon Co., Ltd.Inventors: Katsuhiko Shinada, Kei Murase, Teruyuki Yamada, Yuuichi Shirasu, Masahiko Mitzuta, Hiroyuki Fujiki
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Publication number: 20070243324Abstract: An object of the present invention is to provide a composite porous membrane, which has not only excellent filtration capacity, but also excellent adhesion between a porous membrane and a braid and mechanical properties, and a method for producing the composite porous membrane. The present invention relates to a composite porous membrane comprising a braid, and a membrane material; wherein the membrane material comprises a first porous layer comprising a dense layer which is arranged on the outer surface of the braid, and a second porous layer comprising a dense layer which is arranged on the first porous layer, and a method for producing the composite porous membrane.Type: ApplicationFiled: June 21, 2007Publication date: October 18, 2007Applicant: Mitsubishi Rayon Engineering Co., Ltd. & Mitsubishi Rayon Co., Ltd.Inventors: Katsuhiko SHINADA, Kei Murase, Teruyuki Yamada, Yuuichi Shirasu, Masahiko Mizuta, Hiroyuki Fujiki
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Publication number: 20050205488Abstract: An object of the present invention is to provide a composite porous membrane, which has not only excellent filtration capacity, but also excellent adhesion between a porous membrane and a braid and mechanical properties, and a method for producing the composite porous membrane. The present invention relates to a composite porous membrane comprising a braid, and a membrane material; wherein the membrane material comprises a first porous layer comprising a dense layer which is arranged on the outer surface of the braid, and a second porous layer comprising a dense layer which is arranged on the first porous layer, and a method for producing the composite porous membrane.Type: ApplicationFiled: May 10, 2005Publication date: September 22, 2005Applicant: Mitsubishi Rayon Co., Ltd.Inventors: Katsuhiko Shinada, Kei Murase, Teruyuki Yamada, Yuuichi Shirasu, Masahiko Mizuta, Hiroyuki Fujiki
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Patent number: 6248267Abstract: The present invention provides fibril system fibers which may be employed in filter applications and in artificial leather applications, and also provides an industrially superior manufacturing method for such fibril system fibers, and a spinning nozzle. The fibril fibers of the present invention include at least one macromolecular polymer having a film forming ability, and they have a structure in which fibrillated fibers having a diameter of 10 micrometers or less branch from main fibers having a width within a range of 0.1 micrometers-500 micrometers, and a length within a range of 10 micrometers-10 cm.Type: GrantFiled: August 27, 1998Date of Patent: June 19, 2001Assignee: Mitsubishi Rayon Co., Ltd.Inventors: Yoshihiko Hosako, Teruyuki Yamada, Katsuhiko Shinada, Hideaki Habara, Shigeki Ogawa, Sadatoshi Nagamine, Keiji Hirota, Takashi Kozakura