Patents by Inventor Chiharu Okawara

Chiharu Okawara 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: 10280273
    Abstract: Provided is a gas barrier laminate film capable of realizing excellent gas barrier property, water resistance, and adhesiveness, having a plastic substrate (A), a silicon oxide layer (B) formed on at least one surface of the plastic substrate (A), and a coat layer (C) formed by applying a coating solution onto a surface of the silicon oxide layer (B), wherein the coating solution comprises a mixture of a polyurethane-based resin (c1) and a silane coupling agent (c2) and contains a reaction product of (c1) with (c2) as a main component; and a number-average molecular weight of the reaction product is in the range of 100,000 to 1,000,000.
    Type: Grant
    Filed: July 23, 2015
    Date of Patent: May 7, 2019
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Kota Ozeki, Tetsunori Takano, Chiharu Okawara
  • Publication number: 20170166718
    Abstract: Provided is a gas barrier laminate film capable of realizing excellent gas barrier property, water resistance, and adhesiveness, having a plastic substrate (A), a silicon oxide layer (B) formed on at least one surface of the plastic substrate (A), and a coat layer (C) formed by applying a coating solution onto a surface of the silicon oxide layer (B), wherein the coating solution comprises a mixture of a polyurethane-based resin (c1) and a silane coupling agent (c2) and contains a reaction product of (c1) with (c2) as a main component; and a number-average molecular weight of the reaction product is in the range of 100,000 to 1,000,000.
    Type: Application
    Filed: July 23, 2015
    Publication date: June 15, 2017
    Applicant: MITSUBISHI PLASTICS, INC.
    Inventors: Kota OZEKI, Tetsunori TAKANO, Chiharu OKAWARA
  • Patent number: 9199436
    Abstract: In the gas-barrier laminate having an inorganic thin layer formed on at least one surface of a substrate having a polyethylene naphthalate layer, provided by the present invention is a gas-barrier laminate having not only high water vapor barrier property and oxygen barrier property abut also excellent adhesion between the substrate and the inorganic thin layer. The said gas-barrier laminate, comprising: a substrate comprising a polyethylene naphthalate layer; a layer formed from a composition comprising an acryl polyol and an isocyanate compound on at least one surface of the substrate; and an inorganic thin layer, arranged in the stated order.
    Type: Grant
    Filed: July 27, 2012
    Date of Patent: December 1, 2015
    Assignee: MITSUBISHI PLASTICS, INC.
    Inventors: Yasushi Sasaoka, Chiharu Okawara, Tooru Hachisuka
  • Publication number: 20140154517
    Abstract: In the gas-barrier laminate having an inorganic thin layer formed on at least one surface of a substrate having a polyethylene naphthalate layer, provided by the present invention is a gas-barrier laminate having not only high water vapor barrier property and oxygen barrier property abut also excellent adhesion between the substrate and the inorganic thin layer. The said gas-barrier laminate, comprising: a substrate comprising a polyethylene naphthalate layer; a layer formed from a composition comprising an acryl polyol and an isocyanate compound on at least one surface of the substrate; and an inorganic thin layer, arranged in the stated order.
    Type: Application
    Filed: July 27, 2012
    Publication date: June 5, 2014
    Applicant: Mitsubishi Plastics, Inc.
    Inventors: Yasushi Sasaoka, Chiharu Okawara, Tooru Hachisuka
  • Patent number: 8658278
    Abstract: Provided is a film which can be industrially coated easily and exhibits excellent gas barrier performance without being subjected to a high-temperature heat treatment. The film exhibits good gas barrier performance immediately after the production, and maintains the excellent gas barrier performance while exhibiting excellent hot water resistance and printing resistance.
    Type: Grant
    Filed: August 30, 2006
    Date of Patent: February 25, 2014
    Assignee: Mitsubishi Plastics, Inc.
    Inventors: Chiharu Okawara, Shigenobu Yoshida, Tooru Hachisuka, Motoyoshi Takemura
  • Publication number: 20140017468
    Abstract: A film which can be industrially coated easily and exhibits excellent gas barrier performance without being subjected to a high-temperature heat treatment, good gas barrier performance immediately after the production, and maintains the excellent gas barrier performance while exhibiting excellent hot water resistance and printing resistance; a gas barrier laminated film including a resin layer on an inorganic thin film formed on at least one surface of a support film, the resin layer being formed by applying: (1) an aqueous dispersion containing polyvinyl alcohol (a), an ethylene-unsaturated carboxylic acid copolymer (b), and inorganic particles (c); (2) an aqueous dispersion containing an ethylene-unsaturated carboxylic acid copolymer (b), inorganic particles (c), and/or a cross-linking agent (d); or (3) an aqueous dispersion containing polyvinyl alcohol (a), an ethylene-unsaturated carboxylic acid copolymer (b), inorganic particles (c), and cross-linking agent (d), to the inorganic thin film surface; and a
    Type: Application
    Filed: September 17, 2013
    Publication date: January 16, 2014
    Applicant: MITSUBISHI PLASTICS, INC.
    Inventors: Chiharu OKAWARA, Shigenobu Yoshida, Tooru Hachisuka, Motoyoshi Takemura
  • Publication number: 20130323436
    Abstract: Provided are a method for producing a film, which is satisfactory in productivity, exhibits high gas-barrier property immediately after production, and has excellent adhesive strength between constituent layers while maintaining the excellent gas-barrier property, and a gas-barrier film, which is obtained by the method. The method for producing a gas-barrier film includes the steps of: (1) forming an inorganic thin film by a vacuum deposition method on at least one surface of a base film; (2) forming a thin film by a plasma CVD method on the inorganic thin film formed in the step (1); and (3) forming an inorganic thin film by the vacuum deposition method on the thin film formed in the step (2), in which each of the steps (1) and (3), and the step (2) are sequentially carried out at a pressure of 1×10?7 to 1 Pa, and at a pressure of 1×10?3 to 1×102 Pa, respectively.
    Type: Application
    Filed: August 9, 2013
    Publication date: December 5, 2013
    Applicant: MITSUBISHI PLASTICS, INC.
    Inventors: Shigenobu YOSHIDA, Chiharu Okawara, Kota Ozeki
  • Patent number: 8586181
    Abstract: Provided is a protective sheet for a solar cell module having a resin sheet, a vapor deposited layer containing an inorganic oxide provided on at least one side thereof, and a fluorine resin layer containing a silane coupling agent laminated on the vapor deposited layer.
    Type: Grant
    Filed: July 8, 2010
    Date of Patent: November 19, 2013
    Assignees: Lintec Corporation, Mitsubishi Plastics, Inc.
    Inventors: Yasunari Takanashi, Chiharu Okawara, Shigenobu Yoshida
  • Publication number: 20120125437
    Abstract: A solar cell module including a thin-film solar cell element protected with a novel gas barrier film is provided. The solar cell module includes a laminate obtained by laminating a gas barrier film on a layer including at least a solar cell element. The gas barrier film is obtained by laminating at least a substrate film, weather-resistant coating layer, and inorganic thin film layer. The weather-resistant coating layer is made of at least one of (a) a material obtained by crosslinking modified polyvinyl alcohol, (b) a material obtained by crosslinking polycaprolactone polyol and/or a material obtained by crosslinking polycarbonate polyol, and (c) an acrylic polymer having at least one group selected from the group consisting of an UV-stabilizing group, UV-absorbing group, and cycloalkyl group. The solar cell element is a thin-film solar cell element.
    Type: Application
    Filed: January 30, 2012
    Publication date: May 24, 2012
    Applicants: MITSUBISHI CHEMICAL CORPORATION, MITSUBISHI PLASTICS, INC.
    Inventors: Chiharu OKAWARA, Shigenobu Yoshida, Tooru Hachisuka, Hiromu Watanabe
  • Publication number: 20120097220
    Abstract: Provided are a sheet for a solar cell of a monolayer construction or a multilayer construction based on a polyphenylene ether-based resin layer formed of a resin composition using a polyphenylene ether as a main component, which has excellent durability, excellent flame retardancy, excellent dimensional stability and high adhesiveness with a encapsulating resin layer or the like, and a solar cell module obtained by providing the sheet for a solar cell.
    Type: Application
    Filed: April 28, 2010
    Publication date: April 26, 2012
    Applicant: MITSUBISHI PLASTICS, INC.
    Inventors: Yo Miyashita, Jun Nishioka, Kouichirou Taniguchi, Chiharu Okawara, Shigenobu Yoshida, Michiko Otsuka, Kazuhiko Kitayama
  • Patent number: 8124236
    Abstract: The present invention relates to a gas-barrier laminate for hydrothermal treatment which comprises a base plastic film, a coating layer formed on at least one surface of the base plastic film, an inorganic thin film formed on a surface of the coating layer which is made of a metal compound, and a heat-sealable plastic film laminated on the inorganic thin film or the base plastic film, wherein the inorganic thin film before laminating the heat-sealable plastic film thereon has a rubbing strength of not less than 20 times as measured under a load of 70 g, and the coating layer has a hardness of 0.15 to 0.40 GPa. The laminate of the present invention is excellent in interlaminar bonding property, hardly undergoes breakage of the inorganic thin film owing to the hydrothermal treatment, and can maintain an excellent gas-barrier property even after subjected to the hydrothermal treatment.
    Type: Grant
    Filed: July 12, 2006
    Date of Patent: February 28, 2012
    Assignee: Mitsubishi Plastics, Inc.
    Inventors: Chiharu Okawara, Shigenobu Yoshida, Tooru Hachisuka
  • Patent number: 8092917
    Abstract: A gas-barrier laminate comprises a plastic substrate (A), an inorganic thin film (B) formed on at least one surface of the plastic substrate (A), and a polyester-based resin layer (C) formed by applying a coating material containing a polyester-based resin on a surface of the inorganic thin film (B), wherein the polyester-based resin has a glass transition temperature of 50 to 70° C., a molecular weight of 1500 to 15000 and a hydroxyl value of 10 to 60 mg KOH/g, and the gas-barrier laminate has an oxygen permeability of not more than 5 cc/m2/day/atm and a water vapor permeability of not more than 5 g/m2/day.
    Type: Grant
    Filed: June 28, 2004
    Date of Patent: January 10, 2012
    Assignee: Mitsubishi Plastics, Inc.
    Inventors: Shigenobu Yoshida, Tooru Hachisuka, Chiharu Okawara
  • Publication number: 20120003500
    Abstract: Provided are a method for producing a film, which is satisfactory in productivity, exhibits high gas-barrier property immediately after production, and has excellent adhesive strength between constituent layers while maintaining the excellent gas-barrier property, and a gas-barrier film, which is obtained by the method. The method for producing a gas-barrier film includes the steps of; (1) forming an inorganic thin film by a vacuum deposition method on at least one surface of a base film; (2) forming a thin film by a plasma CVD method on the inorganic thin film formed in the step (1); and (3) forming an inorganic thin film by the vacuum deposition method on the thin film formed in the step (2), in which each of the steps (1) and (3), and the step (2) are sequentially carried out at a pressure of 1×10?7 to 1 Pa, and at a pressure of 1×10?3 to 1×102 Pa, respectively.
    Type: Application
    Filed: February 15, 2010
    Publication date: January 5, 2012
    Applicant: MITSUBISHI PLASTICS, INC.
    Inventors: Shigenobu Yoshida, Chiharu Okawara, Kota Ozeki
  • Publication number: 20110220169
    Abstract: Provided is a back sheet for a solar battery which holds an excellent gas barriering property and which is excellent in a weatherability and a light shielding property. It is a back sheet for a solar battery comprising a light shielding polyolefin base resin colored layer and a weather resistant polyester base resin layer and comprising a gas barriering layer containing a weather resistant coating layer and an inorganic thin film layer provided between the above layers, wherein the weather resistant coating layer comprises at least one selected from (a) a cross-linked product of polycaprolactonepolyol and/or polycarbonatepolyol, (b) a cross-linked product of modified polyvinyl alcohol and (c) an acryl base copolymer having at least one group selected from the group consisting of a UV ray stabilizing group, a UV ray absorbing group and a cycloalkyl group.
    Type: Application
    Filed: July 8, 2009
    Publication date: September 15, 2011
    Applicant: Mitsubishi Plastics, Inc.
    Inventors: Chiharu Okawara, Shigenobu Yoshida, Yoshihiro Yamazaki
  • Publication number: 20110223419
    Abstract: Provided is a back sheet for a solar battery which holds an excellent gas barriering property and which is excellent in a weatherability and a light shielding property. It is a back sheet for a solar battery comprising a light shielding colored layer and a weather resistant polyester base resin layer and comprising a gas barriering layer containing a weather resistant coating layer and an inorganic thin film layer provided between the above layers, wherein the weather resistant coating layer comprises at least one selected from (a) a cross-linked product of polycaprolactonepolyol and/or polycarbonatepolyol, (b) a cross-linked product of modified polyvinyl alcohol and (c) an acryl base copolymer having at least one group selected from the group consisting of a UV ray stabilizing group, a UV ray absorbing group and a cycloalkyl group.
    Type: Application
    Filed: July 8, 2009
    Publication date: September 15, 2011
    Applicant: MITSUBISHI PLASTICS, INC.
    Inventors: Chiharu Okawara, Shigenobu Yoshida, Yoshihiro Yamazaki
  • Publication number: 20110129654
    Abstract: A gas-barrier laminate, containing a plastic substrate, an inorganic thin film on at least one surface of the plastic substrate, and a coating layer on a surface of the inorganic thin film is provided. The coating layer comprises at least one resin selected from the group consisting of a polyester resin, an urethane resin, an acrylic resin, an alkoxysilyl group-containing resin, an oxazoline group-containing resin and copolymer resins thereof and a hardness of the coating layer is from 0.1 to 0.5 GPa as measured at 23° C. in atmospheric air by a nano-indentation hardness testing method. When the gas-barrier laminate is further laminated on the coating layer with an unstretched polypropylene film having a thickness of 60 ?m and the further obtained laminate subjected to a hydrothermal treatment at 120° C. for 30 min, an oxygen permeability of the further laminate is not more than 50 fmol/m2/s/Pa.
    Type: Application
    Filed: February 7, 2011
    Publication date: June 2, 2011
    Applicant: MITSUBISHI PLASTICS, INC.
    Inventors: Shigenobu YOSHIDA, Chiharu Okawara, Tooru Hachisuka
  • Publication number: 20110086220
    Abstract: [Problems] A gas-barrier laminated film is provided that has considerably excellent gas-barrier property and has excellent capability for an organic device. [Means for Solution] A gas-barrier laminated film for an organic device, containing a plurality of gas-barrier laminates each containing a substrate film having on at least one surface thereof at least two layers of inorganic thin film layers, the plurality of gas-barrier laminates being laminated through an adhesive layer, wherein the at least two layers of inorganic thin film layers contain two or more inorganic thin film layers that are formed in contact with each other, the gas-barrier laminates are laminated with a surface on a side of the substrate film of the gas-barrier laminate facing a surface on a side of the inorganic thin film layer thereof, and the adhesive layer contains an epoxy adhesive having at least one of a m-xylenediamine skeleton, a p-xylenediamine skeleton and a bisphenol skeleton.
    Type: Application
    Filed: May 12, 2009
    Publication date: April 14, 2011
    Applicant: MITSUBISHI PLASTICS, INC.
    Inventors: Shigenobu Yoshida, Chiharu Okawara, Tsutomu Matsui
  • Patent number: 7910213
    Abstract: A gas-barrier laminate with a plastic substrate, an inorganic thin film formed on at least one surface of the plastic substrate, and a coating layer formed by applying a coating material on a surface of the inorganic thin film, wherein said coating layer contains a polyester-based resin having a molecular weight of 3000 to 15000 and a polyurethane-based resin having a molecular weight of 8000 to 30000 at a weight ratio of 5/95 to 95/5, and said gas-barrier laminate has an oxygen permeability of not more than 25 fmol/m2/s/Pa; and a gas-barrier laminate comprising a plastic substrate, an inorganic thin film formed on at least one surface of the plastic substrate, and a coating layer formed by applying a coating material on a surface of the inorganic thin film, wherein the gas-barrier laminate exhibits an oxygen permeability of not more than 50 fmol/m2/s/Pa as measured with respect to a gas-barrier film obtained by laminating an unstretched polypropylene film having a thickness of 60 ?m on the coating layer of t
    Type: Grant
    Filed: March 23, 2005
    Date of Patent: March 22, 2011
    Assignee: Mitsubishi Plastics, Inc.
    Inventors: Shigenobu Yoshida, Chiharu Okawara, Tooru Hachisuka
  • Publication number: 20110045301
    Abstract: Provided is a weather-resistant gas barrier film capable of keeping a high delamination strength and an excellent gas barrier property in a high-temperature high-humidity environment and in a UV radiation environment. The gas barrier film comprises a substrate film, a weather-resistant coating layer formed on at least one surface thereof, and an inorganic thin film layer formed on the surface of the coating layer, wherein the weather-resistant coating layer is selected from (1) a weather-resistant coating layer that contains an acrylic copolymer having at least one group selected from a UV-stabilizing group, a UV-absorbing group and a cycloalkyl group, (2) a weather-resistant coating layer formed by crosslinking a polycaprolactone-polyol and/or a polycarbonate-polyol as the essential ingredient, and (3) a weather-resistant coating layer formed by crosslinking a modified polyvinyl alcohol; and also provided is a method for producing the gas barrier film.
    Type: Application
    Filed: January 27, 2009
    Publication date: February 24, 2011
    Applicant: Mitsubishi Plastics, Inc.
    Inventors: Chiharu Okawara, Shigenobu Yoshida, Tooru Hachisuka
  • Patent number: 7678448
    Abstract: The gas barrier film of the present invention is a gas barrier film comprising a base material, and an inorganic thin film composed of a silicon oxide film formed on one or both surfaces of the base material, wherein radical density of the Pb center of the silicon oxide film observed by an electron spin resonance method (ESR method) is from 1×1016 to 1×1019 spins/cm3, or a gas barrier film comprising a base material, an inorganic thin film containing silicon oxide and the other metal component formed on one or both surfaces of the base material, wherein radical density of the Pb center of the silicon oxide in the inorganic thin film observed by an ESR method is from 13×1014 to 3×1017 spins/mol, and a laminate wherein at least one paper and/or plastic film is laminated on the gas barrier film.
    Type: Grant
    Filed: January 26, 2005
    Date of Patent: March 16, 2010
    Assignee: Mitsubishi Plastics, Inc.
    Inventors: Tooru Hachisuka, Shigenobu Yoshida, Chiharu Okawara, Yoshinori Kobayashi, Kenji Ito, Hisashi Togashi, Kouichi Hirata