Patents by Inventor Hiroki Tomioka

Hiroki Tomioka 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).

  • Patent number: 10906011
    Abstract: The present invention relates to a layered semipermeable membrane satisfying the conditions below. (A) The maximum peak intensity between 3700 and 2900 cm?1 is 0.08 or greater in the difference spectrum between an IR spectrum measured at 25° C. and 97% relative humidity and an IR spectrum measured at 25° C. and 3% relative humidity. (B) The peak top wavenumber between 3700 and 2900 cm?1 of the aforementioned difference spectrum is 3400 cm?1 to 3550 cm?1. (C) The N1s peak has a maximum value at 401 eV or greater in X-ray photoelectron spectroscopy in which X-rays are radiated to a coat layer.
    Type: Grant
    Filed: February 28, 2017
    Date of Patent: February 2, 2021
    Assignee: TORAY INDUSTRIES, INC.
    Inventors: Takahiro Tokuyama, Takafumi Ogawa, Hiroki Tomioka
  • Patent number: 10888822
    Abstract: The present invention provides a separation membrane having excellent separation performance and permeation performance, having high membrane strength, and mainly including a cellulose-based resin. The present invention relates to a separation membrane containing a cellulose ester and having a tensile elasticity of 1,500 to 6,500 MPa.
    Type: Grant
    Filed: September 30, 2015
    Date of Patent: January 12, 2021
    Assignee: Toray Industries, Inc.
    Inventors: Gohei Yamamura, Koichi Takada, Ryuichiro Hiranabe, Hiroki Tomioka
  • Patent number: 10799837
    Abstract: The problem addressed by the present invention is to provide a separation membrane with superior permeation performance and separation performance and having few occurrences of defects. The present invention relates to a separation membrane wherein: the separation membrane has a layer (I) with a thickness of 0.5-100 ?m; letting, in a cross-section in the direction of thickness of the layer (I), region a be a region with a depth of 50-150 nm from a surface (surface A), region b a region with a depth of 50-150 nm from the other surface (surface B), and region c a region with a thickness of 100 nm where the depth from both surfaces is the same, the average pore diameter Pa for region a and the average pore diameter Pb for region b are both 0.3-3.0 nm and the average pore diameter Pc for region c is 3.0 nm or less; and the percentage of open area Ha for region a, the percentage of open area Hb for region b, and the percentage of open area Hc for region c satisfy the following equations.
    Type: Grant
    Filed: January 27, 2017
    Date of Patent: October 13, 2020
    Assignee: TORAY INDUSTRIES, INC.
    Inventors: Gohei Yamamura, Koichi Takada, Hiroki Tomioka
  • Publication number: 20200246759
    Abstract: The problem to be solved by the present invention is to provide a separation film mainly comprising a cellulose-based resin having high permeability. The present invention pertains to a separation film containing a cellulose ester, wherein the separation film is provided with a bicontinuous structure comprising voids and phases containing the cellulose ester, and the width of the voids is 1 to 200 nm inclusive.
    Type: Application
    Filed: April 21, 2020
    Publication date: August 6, 2020
    Applicant: TORAY INDUSTRIES, INC.
    Inventors: Koichi TAKADA, Gohei YAMAMURA, Ryuichiro HIRANABE, Masayuki HANAKAWA, Hiroshi TAKAHASHI, Takaaki MIHARA, Masahiro KIMURA, Hiroki TOMIOKA
  • Publication number: 20200197880
    Abstract: A problem to be solved by the present invention is to provide a separation membrane having excellent separation performance, having high membrane strength and high permeation performance, and mainly including a cellulose-based resin. The present invention is concerned with a separation membrane including a cellulose ester, having, in the interior thereof, voids each having a specified structure, and having a tensile elasticity of 1,000 to 6,500 MPa.
    Type: Application
    Filed: March 5, 2020
    Publication date: June 25, 2020
    Applicant: TORAY INDUSTRIES, INC.
    Inventors: Koichi TAKADA, Gohei YAMAMURA, Ryuichiro HIRANABE, Hiroki TOMIOKA
  • Patent number: 10639595
    Abstract: A problem to be solved by the present invention is to provide a separation membrane having excellent separation performance, having high membrane strength and high permeation performance, and mainly including a cellulose-based resin. The present invention is concerned with a separation membrane including a cellulose ester, having, in the interior thereof, voids each having a specified structure, and having a tensile elasticity of 1,000 to 6,500 MPa.
    Type: Grant
    Filed: March 31, 2016
    Date of Patent: May 5, 2020
    Assignee: TORAY INDUSTRIES, INC.
    Inventors: Koichi Takada, Gohei Yamamura, Ryuichiro Hiranabe, Hiroki Tomioka
  • Patent number: 10478782
    Abstract: Problems that the invention is to solve is to provide a composite hollow fiber membrane being excellent in separation performance and permeation performance, having high membrane strength, and capable of being easily produced, and a method for producing the same. The present invention relates to a composite hollow fiber membrane including at least a layer (A) and a layer (B), in which the composite hollow fiber membrane has an outer diameter of 20 to 350 ?m and an inner diameter of 14 to 250 ?m, the tensile modulus of the composite hollow fiber membrane is from 1,000 to 6,500 MPa, the layer (A) contains a cellulose ester, the thickness of the layer (A) is from 0.01 to 5 ?m, and the open pore ratio HA of the layer (A) and the open pore ratio HB of the layer (B) satisfy HA<HB.
    Type: Grant
    Filed: April 28, 2016
    Date of Patent: November 19, 2019
    Assignee: TORAY INDUSTRIES, INC.
    Inventors: Gohei Yamamura, Koichi Takada, Ryuichiro Hiranabe, Hiroki Tomioka
  • Publication number: 20190046931
    Abstract: The problem addressed by the present invention is to provide a separation membrane with superior permeation performance and separation performance and having few occurrences of defects. The present invention relates to a separation membrane wherein: the separation membrane has a layer (I) with a thickness of 0.5-100 ?m; letting, in a cross-section in the direction of thickness of the layer (I), region a be a region with a depth of 50-150 nm from a surface (surface A), region b a region with a depth of 50-150 nm from the other surface (surface B), and region c a region with a thickness of 100 nm where the depth from both surfaces is the same, the average pore diameter Pa for region a and the average pore diameter Pb for region b are both 0.3-3.0 nm and the average pore diameter Pc for region c is 3.0 nm or less; and the percentage of open area Ha for region a, the percentage of open area Hb for region b, and the percentage of open area Hc for region c satisfy the following equations.
    Type: Application
    Filed: January 27, 2017
    Publication date: February 14, 2019
    Applicant: Toray Industries, Inc.
    Inventors: Gohei YAMAMURA, Koichi TAKADA, Hiroki TOMIOKA
  • Publication number: 20190022602
    Abstract: The present invention relates to a layered semipermeable membrane satisfying the conditions below. (A) The maximum peak intensity between 3700 and 2900 cm?1 is 0.08 or greater in the difference spectrum between an IR spectrum measured at 25° C. and 97% relative humidity and an IR spectrum measured at 25° C. and 3% relative humidity. (B) The peak top wavenumber between 3700 and 2900 cm?1 of the aforementioned difference spectrum is 3400 cm?1 to 3550 cm?1. (C) The N1s peak has a maximum value at 401 eV or greater in X-ray photoelectron spectroscopy in which X-rays are radiated to a coat layer.
    Type: Application
    Filed: February 28, 2017
    Publication date: January 24, 2019
    Applicant: TORAY INDUSTRIES, INC.
    Inventors: Takahiro TOKUYAMA, Takafumi OGAWA, Hiroki TOMIOKA
  • Publication number: 20180280893
    Abstract: The problem to be solved by the present invention is to provide a separation film mainly comprising a cellulose-based resin having high permeability. The present invention pertains to a separation film containing a cellulose ester, wherein the separation film is provided with a bicontinuous structure comprising voids and phases containing the cellulose ester, and the width of the voids is 1 to 200 nm inclusive.
    Type: Application
    Filed: September 30, 2016
    Publication date: October 4, 2018
    Applicant: TORAY INDUSTRIES, INC.
    Inventors: Koichi TAKADA, Gohei YAMAMURA, Ryuichiro HIRANABE, Masayuki HANAKAWA, Hiroshi TAKAHASHI, Takaaki MIHARA, Masahiro KIMURA, Hiroki TOMIOKA
  • Publication number: 20180117537
    Abstract: Problems that the invention is to solve is to provide a composite hollow fiber membrane being excellent in separation performance and permeation performance, having high membrane strength, and capable of being easily produced, and a method for producing the same. The present invention relates to a composite hollow fiber membrane including at least a layer (A) and a layer (B), in which the composite hollow fiber membrane has an outer diameter of 20 to 350 ?m and an inner diameter of 14 to 250 ?m, the tensile modulus of the composite hollow fiber membrane is from 1,000 to 6,500 MPa, the layer (A) contains a cellulose ester, the thickness of the layer (A) is from 0.01 to 5 ?m, and the open pore ratio HA of the layer (A) and the open pore ratio HB of the layer (B) satisfy HA<HB.
    Type: Application
    Filed: April 28, 2016
    Publication date: May 3, 2018
    Applicant: TORAY INDUSTRIES, INC.
    Inventors: Gohei YAMAMURA, Koichi TAKADA, Ryuichiro HIRANABE, Hiroki TOMIOKA
  • Publication number: 20180065093
    Abstract: A problem to be solved by the present invention is to provide a separation membrane having excellent separation performance, having high membrane strength and high permeation performance, and mainly including a cellulose-based resin. The present invention is concerned with a separation membrane including a cellulose ester, having, in the interior thereof, voids each having a specified structure, and having a tensile elasticity of 1,000 to 6,500 MPa.
    Type: Application
    Filed: March 31, 2016
    Publication date: March 8, 2018
    Applicant: TORAY INDUSTRIES, INC.
    Inventors: Koichi TAKADA, Gohei YAMAMURA, Ryuichiro HIRANABE, Hiroki TOMIOKA
  • Publication number: 20170326506
    Abstract: The present invention provides a semipermeable membrane which has resistance to oxidizing agents even in the presence of heavy metals and which, despite this, can have salt-removing performance equal to that of semipermeable membranes having poor resistance to oxidizing agents. A coated semipermeable membrane of the invention includes a semipermeable layer and a polymer layer formed on the semipermeable layer, and the polymer layer includes a polymerization product formed by both condensation of hydrolyzable groups possessed by the following compound (A) and polymerization of the compound (A) with the following compound (B): (A) a silicon compound having a silicon atom, a reactive group including an ethylenically unsaturated group directly bonded to the silicon atom, and a hydrolyzable group directly bonded to the silicon atom; and (B) a compound other than the compound (A), which has both a hydrophilic group and an ethylenically unsaturated group.
    Type: Application
    Filed: November 27, 2015
    Publication date: November 16, 2017
    Applicant: TORAY INDUSTRIES, INC.
    Inventors: Takahiro TOKUYAMA, Hiroki TOMIOKA, Takafumi OGAWA, Yutaro SUZUKI
  • Publication number: 20170296984
    Abstract: The present invention provides a separation membrane having excellent separation performance and permeation performance, having high membrane strength, and mainly including a cellulose-based resin. The present invention relates to a separation membrane containing a cellulose ester and having a tensile elasticity of 1,500 to 6,500 MPa.
    Type: Application
    Filed: September 30, 2015
    Publication date: October 19, 2017
    Applicant: TORAY INDUSTRIES, INC.
    Inventors: Gohei Yamamura, Koichi Takada, Ryuichiro Hiranabe, Hiroki Tomioka
  • Publication number: 20160317973
    Abstract: Provided is a production process for a semipermeable membrane having both semipermeability and strength and also provided is the semipermeable membrane. The process comprises the step of forming a liquid membrane from a membrane-forming solution comprising materials (A) to (C), material (A) being a polymer having a repeating unit structure comprising one or more kinds of structural moieties selected from the group consisting of an amide group, an imide group, a sulfonyl group, and a heterocyclic ring, material (B) being a good solvent for material (A), material (C) being a salt, and the step of removing the solvent from the liquid membrane.
    Type: Application
    Filed: June 11, 2014
    Publication date: November 3, 2016
    Applicant: TORAY INDUSTRIES, INC.
    Inventors: Takahiro TOKUYAMA, Hiroki TOMIOKA
  • Patent number: 8960449
    Abstract: In manufacturing a composite semipermeable membrane useful for separating a liquid mixture selectively, it is rendered possible to provide a composite semipermeable membrane that exhibits reduced deterioration of water permeability and solute removing property as a result of drying and that demonstrates reduced economic burden and load for waste liquid treatment without impairing the water permeability or solute removal ratio of the composite semipermeable membrane through change of the membrane manufacturing method, by making a saccharide exist in an aqueous polyfunctional amine solution in performing interfacial polycondensation by bringing the aqueous solution of the polyfunctional amine into contact with an organic solvent solution containing a polyfunctional acid halide on a microporous support membrane.
    Type: Grant
    Filed: October 26, 2009
    Date of Patent: February 24, 2015
    Assignee: Toray Industries, Inc.
    Inventors: Hiroki Tomioka, Aki Katsuno, Masahiro Henmi
  • Publication number: 20140377460
    Abstract: In order to obtain a composite separation membrane which has excellent chemical resistance, separation performance and water permeability at the same time, the present invention provides a composite separation membrane comprising a separation function layer on a porous supporting membrane, characterized in that the separation function layer contains at least a polymer of a polyhedral silsesquioxane represented by the following general formula (a) and a hydrophilic monomer. (R1SiO1.5)n(R2SiO1.5)m ??General Formula (a) (In the formula, R1 includes a polymerizable reactive moiety; R2 represents a hydrogen atom or an alkyl group, which may be substituted; and n and m each represent an integer satisfying n>2 or m>0, with n+m being 8, 10 or 12.
    Type: Application
    Filed: September 9, 2014
    Publication date: December 25, 2014
    Applicant: TORAY INDUSTRIES, INC.
    Inventors: Jun OKABE, Hiroki TOMIOKA, Masahiro HENMI
  • Patent number: 8657123
    Abstract: An object of the present invention is to provide a composite semipermeable membrane which has excellent chemical resistance, separation performance, and water permeability, and the composite semipermeable membrane has the following structure. The present invention provides a composite semipermeable membrane in which an separation function layer is formed on a microporous supporting membrane, wherein the separation function layer is formed from (A) a silicon compound in which a reactive group having an ethylenically unsaturated group and a hydrolyzable group are directly bonded to silicon atoms, and (B) a compound having an ethylenically unsaturated group other than the silicon compound, by condensation of the hydrolyzable group of the silicon compound (A) and polymerization of the ethylenically unsaturated group of the silicon compound (A) and the ethylenically unsaturated group of the compound (B) having the ethylenically unsaturated group.
    Type: Grant
    Filed: September 11, 2009
    Date of Patent: February 25, 2014
    Assignee: Toray Industries, Inc.
    Inventors: Jun Okabe, Hiroki Tomioka, Masahiro Henmi
  • Patent number: 8602222
    Abstract: There is provided a composite semipermeable membrane that shows a high salt removal ratio and high performance in rejecting boron that is not dissociated in the neutral region. The composite semipermeable membrane is produced by a process that includes forming a separating functional polyamide layer on a porous substrate film, while using an organic solvent solution containing a specific cyclic aliphatic compound or a specific aromatic compound such that a polyamide molecule that forms the separating functional polyamide layer has a partial structure composed of “a cyclic aliphatic group or an aromatic group having at least two specific substituents, at least one of which contains a heteroatom bond and a carbonyl group at the ? or ? position”.
    Type: Grant
    Filed: December 13, 2006
    Date of Patent: December 10, 2013
    Assignee: Toray Industries, Inc.
    Inventors: Koji Nakatsuji, Hiroki Tomioka
  • Publication number: 20130313186
    Abstract: Provided is a composite semipermeable membrane comprising a microporous support membrane and a separation functional layer formed thereon, wherein the separation functional layer is formed from Compound (A) in which a reactive group(s) having an ethylenically unsaturated group and a hydrolyzable group(s) are bonded directly to a silicon atom, Compound (B) having an ethylenically unsaturated group, the Compound (B) being different from said Compound (A), and Compound (C) having an ethylenically unsaturated group, the Compound (C) being different from said Compound (A) and (B), by condensation of hydrolyzable groups that the Compound (A) has and polymerization of ethylenically unsaturated groups that the Compound (A), the Compound (B), and the Compound (C) have, and the Compound (A), the Compound (B), and the Compound (C) satisfy the relationship of the following equation (I): |QA?QC|+|QB?QC|=|QA?QB|??(I) (QX represents an Alfrey-Price Q value of Compound X).
    Type: Application
    Filed: December 5, 2011
    Publication date: November 28, 2013
    Applicant: TORAY INDUSTRIES, INC.
    Inventors: Hiroki Minehara, Koji Nakatsuji, Hiroki Tomioka