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).
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Patent number: 11573359Abstract: 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: GrantFiled: May 25, 2021Date of Patent: February 7, 2023Assignee: ZEON CORPORATIONInventors: Hiromu Mashima, Takamichi Inomata
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Patent number: 11409028Abstract: 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: GrantFiled: July 23, 2018Date of Patent: August 9, 2022Assignee: ZEON CORPORATIONInventors: Hiromu Mashima, Takamichi Inomata
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Patent number: 11333814Abstract: 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: GrantFiled: July 23, 2018Date of Patent: May 17, 2022Assignee: ZEON CORPORATIONInventors: Hiromu Mashima, Takamichi Inomata
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Publication number: 20210278580Abstract: 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: ApplicationFiled: May 25, 2021Publication date: September 9, 2021Applicant: ZEON CORPORATIONInventors: Hiromu MASHIMA, Takamichi INOMATA
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Publication number: 20210109268Abstract: 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: ApplicationFiled: October 18, 2018Publication date: April 15, 2021Applicant: ZEON CORPORATIONInventor: Takamichi INOMATA
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Publication number: 20200408978Abstract: 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: ApplicationFiled: July 23, 2018Publication date: December 31, 2020Applicant: ZEON CORPORATIONInventors: Hiromu MASHIMA, Takamichi INOMATA
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Patent number: 10865302Abstract: 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: GrantFiled: January 10, 2017Date of Patent: December 15, 2020Assignee: ZEON CORPORATIONInventors: Hiromu Mashima, Takamichi Inomata
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Patent number: 10816697Abstract: 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: GrantFiled: June 23, 2017Date of Patent: October 27, 2020Assignee: ZEON CORPORATIONInventors: Hiromu Mashima, Takamichi Inomata
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Publication number: 20200301046Abstract: 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: ApplicationFiled: December 20, 2018Publication date: September 24, 2020Applicant: ZEON CORPORATIONInventors: Hiromu MASHIMA, Takamichi INOMATA
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Publication number: 20200209450Abstract: 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: ApplicationFiled: July 23, 2018Publication date: July 2, 2020Applicant: ZEON CORPORATIONInventors: Hiromu MASHIMA, Takamichi INOMATA
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Publication number: 20200158932Abstract: 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: ApplicationFiled: July 23, 2018Publication date: May 21, 2020Applicant: ZEON CORPORATIONInventors: Hiromu MASHIMA, Takamichi INOMATA
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Publication number: 20190162876Abstract: 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: ApplicationFiled: June 23, 2017Publication date: May 30, 2019Applicant: ZEON CORPORATIONInventors: Hiromu MASHIMA, Takamichi INOMATA
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Publication number: 20190040249Abstract: 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: ApplicationFiled: January 10, 2017Publication date: February 7, 2019Applicant: ZEON CORPORATIONInventors: Hiromu MASHIMA, Takamichi INOMATA