Patents by Inventor Takamichi INOMATA

Takamichi INOMATA 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: 11573359
    Abstract: A method for producing a polarizing plate including a polarizer and a substrate film is provided. The method comprises: stretching a primary film to obtain a polarizer material film; providing an unstretched substrate film on the polarizer material film to obtain a layered body; and stretching the layered body to obtain the polarizing plate. The polarizer includes a dichroic material and has a thickness T of 20 ?m or less. A phase difference Re in an in-plane direction of the substrate film in the polarizing plate is 20 nm or less.
    Type: Grant
    Filed: May 25, 2021
    Date of Patent: February 7, 2023
    Assignee: ZEON CORPORATION
    Inventors: Hiromu Mashima, Takamichi Inomata
  • Patent number: 11409028
    Abstract: A layered body including a polarizer material film that is a product of stretching in one or more directions, and a substrate film provided on the polarizer material film, the substrate film being a product of stretching in one or more directions, wherein a stretching ratio X of the polarizer material film is 1.5 or more and 5.5 or less, a thickness T2 is 20 ?m or less, the thickness T2 being a thickness of the polarizer material film as a result of free end uniaxial stretching of the layered body at a stretching ratio 6.0/X, an angle ?2 formed by a stretching direction of the polarizer material film and a stretching direction of the substrate film is less than 1°, and a stretching ratio Y of the substrate film is smaller than the stretching ratio X of the polarizer material film.
    Type: Grant
    Filed: July 23, 2018
    Date of Patent: August 9, 2022
    Assignee: ZEON CORPORATION
    Inventors: Hiromu Mashima, Takamichi Inomata
  • Patent number: 11333814
    Abstract: A layered body including a polarizer material film that is a product of stretching in one or more directions, and a substrate film provided on the polarizer material film, the substrate film being a product of stretching in one or more directions, wherein a stretching ratio X of the polarizer material film is 1.5 or more and 5.5 or less, a thickness T2 is 20 ?m or less, the thickness T2 being a thickness of the polarizer material film as a result of free end uniaxial stretching of the layered body at a stretching ratio 6.0/X, an angle ?2 formed by a stretching direction of the polarizer material film and a stretching direction of the substrate film is less than 1°, and a stretching ratio Y of the substrate film is smaller than the stretching ratio X of the polarizer material film.
    Type: Grant
    Filed: July 23, 2018
    Date of Patent: May 17, 2022
    Assignee: ZEON CORPORATION
    Inventors: Hiromu Mashima, Takamichi Inomata
  • Publication number: 20210278580
    Abstract: A method for producing a polarizing plate including a polarizer and a substrate film is provided. The method comprises: stretching a primary film to obtain a polarizer material film; providing an unstretched substrate film on the polarizer material film to obtain a layered body; and stretching the layered body to obtain the polarizing plate. The polarizer includes a dichroic material and has a thickness T of 20 ?m or less. A phase difference Re in an in-plane direction of the substrate film in the polarizing plate is 20 nm or less.
    Type: Application
    Filed: May 25, 2021
    Publication date: September 9, 2021
    Applicant: ZEON CORPORATION
    Inventors: Hiromu MASHIMA, Takamichi INOMATA
  • Publication number: 20210109268
    Abstract: A polarizing film comprises a polarizer layer, a resin layer, an adhesive layer, and a hard coat layer in this order, wherein the resin layer is formed of a resin having a storage elastic modulus, measured as a film having a thickness of 1 mm, of 10 MPa or more and 1000 MPa or less, and the adhesive layer is in direct contact with the hard coat layer.
    Type: Application
    Filed: October 18, 2018
    Publication date: April 15, 2021
    Applicant: ZEON CORPORATION
    Inventor: Takamichi INOMATA
  • Publication number: 20200408978
    Abstract: A polarizing plate including a polarizer and a substrate film, wherein the polarizing plate is a product obtained by stretching a layered body, the layered body includes a polarizer material film and an unstretched substrate film, the polarizer material film is a film obtained by stretching a primary film, the polarizer includes a dichroic material and has a thickness T of 20 ?m or less, and a phase difference Re in an in-plane direction of the substrate film in the polarizing plate is 20 nm or less. Preferably, the layered body further includes an adhesive layer that is provided between the polarizer material film and the unstretched substrate film.
    Type: Application
    Filed: July 23, 2018
    Publication date: December 31, 2020
    Applicant: ZEON CORPORATION
    Inventors: Hiromu MASHIMA, Takamichi INOMATA
  • Patent number: 10865302
    Abstract: A resin composition including a hydrogenated block copolymer product [D] and a plasticizer, wherein: the hydrogenated product [D] is a hydrogenated product obtained by hydrogenating a block copolymer [C] composed of a polymer block [A] containing a repeating unit [I] derived from an aromatic vinyl compound as a main component, and a polymer block [B] containing the repeating unit [I] derived from an aromatic vinyl compound and a repeating unit [II] derived from a chain conjugated diene compound as main components; a ratio of the block [A] and the block [B], and a ratio of the unit [I] and the unit [II] are in specific ranges, and, in the hydrogenated product [D], 90% or more of all unsaturated bonds in the block copolymer [C] are hydrogenated.
    Type: Grant
    Filed: January 10, 2017
    Date of Patent: December 15, 2020
    Assignee: ZEON CORPORATION
    Inventors: Hiromu Mashima, Takamichi Inomata
  • Patent number: 10816697
    Abstract: A polarizing plate protective film including a resin layer that has a melt flow rate M [g/10 min] at a temperature of 190° C. and a load of 2.16 kg satisfying the following formula (1): 5 g/10 min?M??Formula (1). An adhesion strength caused by press-bonding of the resin layer to a glass plate surface is 1.0 N/10 mm or more. The glass plate surface is a surface having an arithmetic average roughness of 3 nm which has been subjected to a corona treatment under conditions of an output of 300 W and a discharge amount of 200 W·min/m2. The press-bonding is performed under conditions of a temperature of 110° C., a linear pressure of 25 N/mm, and a speed of 0.04 m/min. The polarizing plate protective film has a tensile elastic modulus E [MPa] satisfying the following formula (2): 200 MPa?E?1,200 MPa??Formula (2).
    Type: Grant
    Filed: June 23, 2017
    Date of Patent: October 27, 2020
    Assignee: ZEON CORPORATION
    Inventors: Hiromu Mashima, Takamichi Inomata
  • Publication number: 20200301046
    Abstract: A polarizing plate protective film whose adhesion strength caused by press-bonding thereof to a glass plate surface is 1.0 N/10 mm or more, wherein the glass plate surface is a surface having an arithmetic average roughness of 3 nm which has been subjected to a corona treatment under conditions of an output of 300 W and a discharge amount of 200 W·min/m2, and the press-bonding is performed under conditions of a temperature of 110° C., a linear pressure of 25 N/mm, and a speed of 0.04 m/min, a melt flow rate M [g/10 min] thereof at a temperature of 190° C. and a load of 2.16 kg being 5 g/10 min or more, and a tensile elastic modulus E [MPa] thereof is 200 MPa or more and 1,200 MPa or less.
    Type: Application
    Filed: December 20, 2018
    Publication date: September 24, 2020
    Applicant: ZEON CORPORATION
    Inventors: Hiromu MASHIMA, Takamichi INOMATA
  • Publication number: 20200209450
    Abstract: A layered body including a polarizer material film, and an unstretched substrate film provided on the polarizer material film, wherein a phase difference Re1 in an in-plane direction of the polarizer material film is 10 nm or less, and a thickness T1 of the polarizer material film is 40 ?m or less. The polarizer material film may be a polarizer material film obtained by dry stretching. Preferably, the polarizer material film is a film obtained by stretching at a stretching ratio X of 1.5 or more and 5.5 or less, and a thickness T2 is 20 ?m or less, the thickness T2 being a thickness of the polarizer material film as a result of free end uniaxial stretching of the layered body at a stretching ratio 6.0/X.
    Type: Application
    Filed: July 23, 2018
    Publication date: July 2, 2020
    Applicant: ZEON CORPORATION
    Inventors: Hiromu MASHIMA, Takamichi INOMATA
  • Publication number: 20200158932
    Abstract: A layered body including a polarizer material film that is a product of stretching in one or more directions, and a substrate film provided on the polarizer material film, the substrate film being a product of stretching in one or more directions, wherein a stretching ratio X of the polarizer material film is 1.5 or more and 5.5 or less, a thickness T2 is 20 ?m or less, the thickness T2 being a thickness of the polarizer material film as a result of free end uniaxial stretching of the layered body at a stretching ratio 6.0/X, an angle ?2 formed by a stretching direction of the polarizer material film and a stretching direction of the substrate film is less than 1°, and a stretching ratio Y of the substrate film is smaller than the stretching ratio X of the polarizer material film.
    Type: Application
    Filed: July 23, 2018
    Publication date: May 21, 2020
    Applicant: ZEON CORPORATION
    Inventors: Hiromu MASHIMA, Takamichi INOMATA
  • Publication number: 20190162876
    Abstract: A polarizing plate protective film including a resin layer that has a melt flow rate M [g/min] at a temperature of 190° C. and a load of 2.16 kg satisfying the following formula (1): 5 g/min?M??Formula (1). An adhesion strength caused by press-bonding of the resin layer to a glass plate surface is 1.0 N/10 mm or more. The glass plate surface is a surface having an arithmetic average roughness of 3 nm which has been subjected to a corona treatment under conditions of an output of 300 W and a discharge amount of 200 W·min/m2. The press-bonding is performed under conditions of a temperature of 110° C., a linear pressure of 25 N/mm, and a speed of 0.04 m/min. The polarizing plate protective film has a tensile elastic modulus E [MPa] satisfying the following formula (2): 200 MPa?E?1,200 MPa??Formula (2).
    Type: Application
    Filed: June 23, 2017
    Publication date: May 30, 2019
    Applicant: ZEON CORPORATION
    Inventors: Hiromu MASHIMA, Takamichi INOMATA
  • Publication number: 20190040249
    Abstract: A resin composition including a hydrogenated block copolymer product [D] and a plasticizer, wherein: the hydrogenated product [D] is a hydrogenated product obtained by hydrogenating a block copolymer [C] composed of a polymer block [A] containing a repeating unit [I] derived from an aromatic vinyl compound as a main component, and a polymer block [B] containing the repeating unit [I] derived from an aromatic vinyl compound and a repeating unit [II] derived from a chain conjugated diene compound as main components; a ratio of the block [A] and the block [B], and a ratio of the unit [I] and the unit [II] are in specific ranges, and, in the hydrogenated product [D], 90% or more of all unsaturated bonds in the block copolymer [C] are hydrogenated.
    Type: Application
    Filed: January 10, 2017
    Publication date: February 7, 2019
    Applicant: ZEON CORPORATION
    Inventors: Hiromu MASHIMA, Takamichi INOMATA