Patents by Inventor Satoshi Mita

Satoshi Mita 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: 11204447
    Abstract: A surface-protective film attached polarizing film is disclosed which includes a polarizing film (A) having a thickness of 100 ?m or less, and a surface-protective film (B) provided on at least one surface of the polarizing film (A), wherein the polarizing film (A) comprises a polarizer, and a protective film provided on at least one surface of the polarizer, the polarizer comprises a polyvinyl alcohol-based resin and has a thickness of 10 ?m or less, the polarizing film (A) has a width WA, the surface-protective film (B) has a width WB, a difference between the widths WA and WB (WA?WB) is 3 mm or more, and a peel strength of the surface-protective film (B) to the polarizing film (A) is 0.2 N/25-mm or less. The surface-protective film-attached polarizing film allows to be restrained the polarizing film from being broken, when the surface-protective film is peeled from the polarizing film.
    Type: Grant
    Filed: March 16, 2017
    Date of Patent: December 21, 2021
    Assignee: NITTO DENKO CORPORATION
    Inventors: Tomonori Ueno, Satoshi Mita, Atsushi Kishi, Kentaro Ikeshima, Yusuke Motegi
  • Publication number: 20210317337
    Abstract: An active-energy-ray-curable adhesive composition comprises at least radical polymerizable compounds. The radical polymerizable compounds comprise a component A having a log Pow of ?2 to 2, and a component B having a log Pow more than 7, each of these log Pow values representing an octanol/water distribution coefficient. The component A preferably comprises at least one nitrogen-containing monomer selected from the group consisting of (meth)acrylamide derivatives, amino-group-containing monomers, and nitrogen-containing and heterocycle-containing vinyl monomers. The component B preferably comprises an alkyl (eth)acrylate having 18 to 20 carbon atoms.
    Type: Application
    Filed: June 21, 2021
    Publication date: October 14, 2021
    Applicant: NITTO DENKO CORPORATION
    Inventors: Masayuki Okamoto, Satoshi Mita, Yoshimi Konno, Taiyan Jiang, Tetsuro Ikeda
  • Patent number: 11137522
    Abstract: The present invention pertains to a one-side-protected polarizing film having a protective film or films on only one surface of a polarizer, wherein: the polarizer contains a polyvinyl alcohol-based resin, and is designed to have a single-body transmittance T and a polarization degree P representing optical properties satisfying the condition of the following formula: P>?(100.929T?42.4?1)×100 (provided that T<42.3) or P?99.9 (provided that T?42.3), and the polarizer and a transparent resin layer have a thickness X (?m) and a thickness Y (?m), respectively, satisfying X?12, Y?15, and 0.15?(Y/X)?3. Even when the thin-type polarizer has prescribed optical properties, this one-side-protected polarizing film is capable of suppressing the occurrence of through cracks, nano-slit-induced defects and curling.
    Type: Grant
    Filed: September 29, 2015
    Date of Patent: October 5, 2021
    Assignee: NITTO DENKO CORPORATION
    Inventors: Satoshi Mita, Tomonori Ueno, Jingfan Xu, Yusuke Motegi, Atsushi Kishi
  • Patent number: 11079526
    Abstract: A polarizing film is disclosed including a polarizer having a thickness of 10 ?m or less, and a transparent resin layer on at least one surface of the polarizer, wherein the polarizer includes a polyvinyl alcohol-based resin, and has a single-body transmittance T and a polarization degree P representing optical properties satisfying the condition of the following formula: P>?(100.929T?42.4?1)×100 (provided that T<42.3) or P?99.9 (provided that T?42.3), and the transparent resin layer is a formed product of a transparent resin layer forming material including a water-based emulsion resin and has a hardness of 0.01 GPa or more. The polarizing film, using a thin-polarizer, can suppress the occurrence of defects such as nano-slits and is further restrained from being lowered in optical properties in a heating and humidifying test to have a high optical reliability.
    Type: Grant
    Filed: March 17, 2017
    Date of Patent: August 3, 2021
    Assignee: NITTO DENKO CORPORATION
    Inventors: Satoshi Mita, Tomonori Ueno, Jingfan Xu, Atsushi Kishi
  • Patent number: 10901129
    Abstract: A polarizing film, wherein transparent protective films are laid, respectively, on/over both surfaces of a polarizer to interpose an adhesive layer (a) and an adhesive layer (b), respectively, between both the surfaces and the transparent protective films. The adhesive layer (a) has a glass transition temperature of ?60° C. or higher and lower than 40° C. The adhesive layer (b) has a glass transition temperature of 40° C. or higher. The adhesive layer (a) is a layer formed in the form of a cured product layer yielded by radiating an active energy ray to an active-energy-ray-curable adhesive composition (a). The active-energy-ray-curable adhesive composition (a) comprises at least one or more radical polymerizable compounds, and when a total amount of the radical polymerizable compound(s) is defined as 100% by weight, one or more alkyl (meth)acrylates (A) (each) having 10 to 20 carbon atoms are comprised in a proportion of 15% or more by weight.
    Type: Grant
    Filed: March 6, 2017
    Date of Patent: January 26, 2021
    Assignee: NITTO DENKO CORPORATION
    Inventors: Masayuki Okamoto, Satoshi Mita, Yoshimi Konno, Taiyan Jiang, Tetsuro Ikeda
  • Patent number: 10884169
    Abstract: A polarizer according to the patent invention is configured to contain boric acid and a polyvinyl alcohol-based resin, to have a thickness of 10 ?m or less, and to have an optical property satisfying the condition represented by the expression: P>?(100.929T-42.4?1)×100 (when T<42.3) or P?99.9 (when T?42.3), wherein T represents the single-body transmittance and P represents the polarization degree. In addition, a boric acid content (a) measured from one side of the polarizer, the one side to be provided with the pressure-sensitive adhesive layer, is less than a boric acid content (b) measured from the other side. The polarizer according to the patent invention can reduce defects due to through cracks and nano-slits even when the polarizer has predetermined optical properties and a thickness of 10 ?m or less.
    Type: Grant
    Filed: January 23, 2017
    Date of Patent: January 5, 2021
    Assignee: NITTO DENKO CORPORATION
    Inventors: Tomonori Ueno, Satoshi Mita, Jingfan Xu, Yusuke Motegi, Atsushi Kishi
  • Patent number: 10858553
    Abstract: A polarizing film, wherein transparent protective films are laid, respectively, on/over both surfaces of a polarizer to interpose an adhesive layer (a) and an adhesive layer (b), respectively, between both surfaces of a polarizer, and transparent protective films. The adhesive layer (a) on/over one of both the surfaces has a glass transition temperature of ?60° C. or higher and lower than 40° C. The adhesive layer (b) on/over the other surface has a glass transition temperature of 40° C. or higher. The adhesive layer (a) is a layer formed in the form of a cured product layer yielded by radiating an active energy ray to an active-energy-ray-curable adhesive composition (a). The active-energy-ray-curable adhesive composition (a) comprises, as radical polymerizable compounds, a component A having a logPow of ?2 to 2, and a component B having a logPow more than 7, these logPow values being each an octanol/water distribution coefficient.
    Type: Grant
    Filed: March 6, 2017
    Date of Patent: December 8, 2020
    Assignee: NITTO DENKO CORPORATION
    Inventors: Masayuki Okamoto, Satoshi Mita, Yoshimi Konno, Taiyan Jiang, Tetsuro Ikeda
  • Patent number: 10845521
    Abstract: A polarizer according to the patent invention is configured to contain boric acid and a polyvinyl alcohol-based resin, to have a thickness of 10 ?m or less, and to have an optical property satisfying the condition represented by the expression: P>?(100.929T-42.4?1)×100 (when T<42.3) or P?99.9 (when T?42.3), wherein T represents the single-body transmittance and P represents the polarization degree. In addition, a boric acid content (a) measured from one side of the polarizer, the one side to be provided with the pressure-sensitive adhesive layer, is less than a boric acid content (b) measured from the other side. The polarizer according to the patent invention can reduce defects due to through cracks and nano-slits even when the polarizer has predetermined optical properties and a thickness of 10 ?m or less.
    Type: Grant
    Filed: January 23, 2017
    Date of Patent: November 24, 2020
    Assignee: NITTO DENKO CORPORATION
    Inventors: Tomonori Ueno, Satoshi Mita, Jingfan Xu, Yusuke Motegi, Atsushi Kishi
  • Publication number: 20200292738
    Abstract: A polarizing film is disclosed including a polarizer having a thickness of 10 ?m or less, and a transparent resin layer on at least one surface of the polarizer, wherein the polarizer includes a polyvinyl alcohol-based resin, and has a single-body transmittance T and a polarization degree P representing optical properties satisfying the condition of the following formula: P>?(100.929T-42.4?1)×100(provided that T<42.3) or P?99.9(provided that T?42.3), and the transparent resin layer is a formed product of a transparent resin layer forming material including a water-based emulsion resin and has a hardness of 0.01 GPa or more. The polarizing film, using a thin-polarizer, can suppress the occurrence of defects such as nano-slits and is further restrained from being lowered in optical properties in a heating and humidifying test to have a high optical reliability.
    Type: Application
    Filed: March 17, 2017
    Publication date: September 17, 2020
    Applicant: NITTO DENKO CORPORATION
    Inventors: Satoshi Mita, Tomonori Ueno, Jingfan Xu, Atsushi Kishi
  • Patent number: 10345500
    Abstract: The present invention pertains to a polarizing film having a transparent resin layer on at least one side of a polarizer containing a polyvinyl alcohol-based resin, wherein the transparent resin layer has a thickness of 0.2 ?m or more and is formed from a layer-forming material containing a polyvinyl alcohol-based resin having a saponification degree of 96 mol % or more, and wherein the combined total content of sodium acetate and potassium acetate contained in the transparent resin layer is less than 1 wt %. This polarizing film has crack-resistant properties, and can minimize degradation of the optical characteristics in a heating and humidifying test.
    Type: Grant
    Filed: February 9, 2016
    Date of Patent: July 9, 2019
    Assignee: NITTO DENKO CORPORATION
    Inventors: Yusuke Motegi, Satoshi Mita, Tomonori Ueno, Atsushi Kishi, Jingfan Xu
  • Patent number: 10302829
    Abstract: The present invention pertains to a polarizing film having a transparent resin layer on at least one side of a polarizer containing a polyvinyl alcohol-based resin, wherein the transparent resin layer has a thickness of 0.2 ?m or more and is formed from a layer-forming material containing a polyvinyl alcohol-based resin having a saponification degree of 96 mol % or more, and wherein the combined total content of sodium acetate and potassium acetate contained in the transparent resin layer is less than 1 wt %. This polarizing film has crack-resistant properties, and can minimize degradation of the optical characteristics in a heating and humidifying test.
    Type: Grant
    Filed: February 9, 2016
    Date of Patent: May 28, 2019
    Assignee: NITTO DENKO CORPORATION
    Inventors: Yusuke Motegi, Satoshi Mita, Tomonori Ueno, Atsushi Kishi, Jingfan Xu
  • Publication number: 20190136091
    Abstract: An active-energy-ray-curable adhesive composition comprises at least one or more radical polymerizable compounds. At the time of defining a total amount of the radical polymerizable compound(s) as 100% by weight, the composition comprises one or more alkyl (meth) acrylates (A) (each) having 10 to 20 carbon atoms in an amount of 15% or more by weight. The active-energy-ray-curable adhesive composition preferably comprises, as the alkyl (meth)acrylate(s) (A), an alkyl (meth)acrylate (A1) having 10 to 14 carbon atoms, and an alkyl (meth)acrylate (A2) having 15 to 20 carbon atoms. A ratio by weight of the component (A1) to the component (A2) (A1/A2) is preferably from 1.0/9.0 to 4.0/6.0.
    Type: Application
    Filed: March 6, 2017
    Publication date: May 9, 2019
    Applicant: NITTO DENKO CORPORATION
    Inventors: Masayuki Okamoto, Satoshi Mita, Yoshimi Konno, Taiyan Jiang, Tetsuro Ikeda
  • Publication number: 20190136101
    Abstract: A polarizing film, wherein transparent protective films are laid, respectively, on/over both surfaces of a polarizer to interpose an adhesive layer (a) and an adhesive layer (b), respectively, between both surfaces of a polarizer, and transparent protective films. The adhesive layer (a) on/over one of both the surfaces has a glass transition temperature of ?60° C. or higher and lower than 40° C. The adhesive layer (b) on/over the other surface has a glass transition temperature of 40° C. or higher. The adhesive layer (a) is a layer formed in the form of a cured product layer yielded by radiating an active energy ray to an active-energy-ray-curable adhesive composition (a). The active-energy-ray-curable adhesive composition (a) comprises, as radical polymerizable compounds, a component A having a logPow of ?2 to 2, and a component B having a logPow more than 7, these logPow values being each an octanol/water distribution coefficient.
    Type: Application
    Filed: March 6, 2017
    Publication date: May 9, 2019
    Applicant: NITTO DENKO CORPORATION
    Inventors: Masayuki Okamoto, Satoshi Mita, Yoshimi Konno, Taiyan Jiang, Tetsuro Ikeda
  • Publication number: 20190137673
    Abstract: A polarizing film, wherein transparent protective films are laid, respectively, on/over both surfaces of a polarizer to interpose an adhesive layer (a) and an adhesive layer (b), respectively, between both the surfaces and the transparent protective films. The adhesive layer (a) has a glass transition temperature of -60° C. or higher and lower than 40° C. The adhesive layer (b) has a glass transition temperature of 40° C. or higher. The adhesive layer (a) is a layer formed in the form of a cured product layer yielded by radiating an active energy ray to an active-energy-ray-curable adhesive composition (a). The active-energy-ray-curable adhesive composition (a) comprises at least one or more radical polymerizable compounds, and when a total amount of the radical polymerizable compound(s) is defined as 100% by weight, one or more alkyl (meth)acrylates (A) (each) having 10 to 20 carbon atoms are comprised in a proportion of 15% or more by weight.
    Type: Application
    Filed: March 6, 2017
    Publication date: May 9, 2019
    Applicant: NITTO DENKO CORPORATION
    Inventors: Masayuki Okamoto, Satoshi Mita, Yoshimi Konno, Taiyan Jiang, Tetsuro Ikeda
  • Publication number: 20190129072
    Abstract: A surface-protective film-attached polarizing film is disclosed which includes a polarizing film (A) having a thickness of 100 ?m or less, and a surface-protective film (B) provided on at least one surface of the polarizing film (A), wherein the polarizing film (A) comprises a polarizer, and a protective film provided on at least one surface of the polarizer, the polarizer comprises a polyvinyl alcohol-based resin and has a thickness of 10 ?m or less, the polarizing film (A) has a width WA, the surface-protective film (B) has a width WB, a difference between the widths WA and WB (WA?WB) is 3 mm or more, and a peel strength of the surface-protective film (B) to the polarizing film (A) is 0.2 N/25-mm or less. The surface-protective film-attached polarizing film allows to be restrained the polarizing film from being broken, when the surface-protective film is peeled from the polarizing film.
    Type: Application
    Filed: March 16, 2017
    Publication date: May 2, 2019
    Applicant: NITTO DENKO CORPORATION
    Inventors: Tomonori Ueno, Satoshi Mita, Atsushi Kishi, Kentaro Ikeshima, Yusuke Motegi
  • Publication number: 20190106599
    Abstract: An active-energy-ray-curable adhesive composition comprises at least radical polymerizable compounds. The radical polymerizable compounds comprise a component A having a log Pow of ?2 to 2, and a component B having a log Pow more than 7, each of these log Pow values representing an octanol/water distribution coefficient. The component A preferably comprises at least one nitrogen-containing monomer selected from the group consisting of (meth)acrylamide derivatives, amino-group-containing monomers, and nitrogen-containing and heterocycle-containing vinyl monomers. The component B preferably comprises an alkyl (meth)acrylate having 18 to 20 carbon atoms.
    Type: Application
    Filed: March 6, 2017
    Publication date: April 11, 2019
    Applicant: NITTO DENKO CORPORATION
    Inventors: Masayuki Okamoto, Satoshi Mita, Yoshimi Konno, Taiyan Jiang, Tetsuro Ikeda
  • Patent number: 10247979
    Abstract: The present invention pertains to a polarizing film having a transparent layer on at least one surface of a polarizer, wherein: the polarizer contains a polyvinyl alcohol-based resin and has a thickness of 15 ?m or less; the transparent layer-side of the polarizer has a compatible layer thereon having compatibility with the transparent layer; and the thickness A of the polarizer and the thickness B of the compatible layer satisfy the general formula (100×B/A)?1. This polarizing film has crack resistance and suppresses changes in the dimensions of the polarizer.
    Type: Grant
    Filed: September 29, 2015
    Date of Patent: April 2, 2019
    Assignee: NITTO DENKO CORPORATION
    Inventors: Satoshi Mita, Tomonori Ueno, Yusuke Motegi, Jingfan Xu, Atsushi Kishi
  • Publication number: 20190049642
    Abstract: A polarizer according to the patent invention is configured to contain boric acid and a polyvinyl alcohol-based resin, to have a thickness of 10 ?m or less, and to have an optical property satisfying the condition represented by the expression: P>?(100.929T-42.4?1)×100 (when T<42.3) or P?99.9 (when T?42.3), wherein T represents the single-body transmittance and P represents the polarization degree. In addition, a boric acid content (a) measured from one side of the polarizer, the one side to be provided with the pressure-sensitive adhesive layer, is less than a boric acid content (b) measured from the other side. The polarizer according to the patent invention can reduce defects due to through cracks and nano-slits even when the polarizer has predetermined optical properties and a thickness of 10 ?m or less.
    Type: Application
    Filed: January 23, 2017
    Publication date: February 14, 2019
    Applicant: NITTO DENKO CORPORATION
    Inventors: Tomonori Ueno, Satoshi Mita, Jingfan Xu, Yusuke Motegi, Atsushi Kishi
  • Publication number: 20190025485
    Abstract: This pressure-sensitive-adhesive-layer-attached one-side-protected polarizing film has a polarizer that contains a polyvinyl alcohol-based resin, contains 20 wt % or less of boric acid relative to the total quantity of the polarizer, has a thickness of 10 ?m or less, and has prescribed optical characteristics. The film thickness of the pressure-sensitive adhesive layer is less than 50 ?m, and if the storage elastic modulus of the pressure-sensitive adhesive layer at 23° C. is termed G (Pa) and the film thickness of the pressure-sensitive adhesive layer is termed H (?m), G>210e0.2035H is satisfied when 50>H?32, and G>35000e0.0433H is satisfied when 32>H>0. In this pressure-sensitive-adhesive-layer-attached one-side-protected polarizing film, the polarizer has prescribed optical characteristics, and defects resulting from through cracks and nano-slits can be suppressed.
    Type: Application
    Filed: January 12, 2017
    Publication date: January 24, 2019
    Applicant: NITTO DENKO CORPORATION
    Inventors: Satoshi Mita, Tomonori Ueno, Jingfan Xu, Yusuke Motegi, Atsushi Kishi
  • Patent number: 10094954
    Abstract: The present invention pertains to a one-side-protected polarizing film having a transparent protective film on only one surface of a polarizer, wherein: the polarizer contains a polyvinyl alcohol-based resin, has a thickness of 10 ?m or less, and is designed to have a single-body transmittance T and a polarization degree P representing optical properties satisfying the condition of the following formula: P>?(100.929T?42.4?1)×100 (provided that T<42.3) or P?99.9 (provided that T?42.3); and the other surface of the polarizer has a transparent layer having a compressive elastic modulus at 80° C. of 0.1 GPa or more. Even when the polarizer has prescribed optical properties and the thickness is 10 ?m or less, this one-side-protected polarizing film is capable of suppressing the occurrence of through cracks and nano-slits.
    Type: Grant
    Filed: September 29, 2015
    Date of Patent: October 9, 2018
    Assignee: NITTO DENKO CORPORATION
    Inventors: Jingfan Xu, Tomonori Ueno, Satoshi Mita, Yusuke Motegi, Atsushi Kishi