Patents by Inventor Hidejirou Yoshikawa

Hidejirou Yoshikawa 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).

  • Publication number: 20230109620
    Abstract: A transparent double-sided self-adhesive sheet is provided which, when bonding to an adherend, not only excels in the ability to conform to steps or surface irregularities caused by a printing site, but also excels in workability such as cutting processability. A transparent double-sided self-adhesive sheet is proposed, having an intermediate resin layer (A) and pressure-sensitive adhesive layers (B) as front and reverse side layers, each of the layers being a layer having one or more species of (meth)acrylic acid ester series (co)polymer as the base resin, in which transparent double-sided self-adhesive sheet, the shear storage elastic modulus (G?(A)) at a frequency of 1 Hz of the intermediate resin layer (A) is higher than the pressure-sensitive adhesive layers (B) in a temperature range of 0° C. to 100° C., and, the indentation hardness (ASKER C2 hardness) of the entire sheet is 10 to 80.
    Type: Application
    Filed: December 12, 2022
    Publication date: April 6, 2023
    Applicant: MITSUBISHI CHEMICAL CORPORATION
    Inventors: Kahoru NIIMI, Hidejirou YOSHIKAWA, Tetsuya YAMAOKA, Makoto INENAGA
  • Patent number: 11535777
    Abstract: To provide a double-sided pressure-sensitive adhesive sheet having high flexing resistance that does not suffer flexure and exfoliation in a flexing test that is closer to the actual use environment. A double-sided pressure-sensitive adhesive sheet having no substrate, containing a pressure-sensitive adhesive composition containing a (meth)acrylate ester (co)polymer (A), and having a glass transition temperature (Tg) defined by a Tan ? peak temperature of dynamic viscoelasticity in a range of ?50° C. to ?20° C., a storage elastic modulus G? at a frequency of 1 Hz and a temperature 100° C. in a range of 2.0×103 to 3.0×104 Pa, and a thickness of 10 ?m or more and 150 ?m or less.
    Type: Grant
    Filed: September 20, 2019
    Date of Patent: December 27, 2022
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Takahisa Uchida, Naoya Miara, Hidejirou Yoshikawa, Ryouta Yamamoto, Shinya Fukuda
  • Publication number: 20190329536
    Abstract: A transparent double-sided self-adhesive sheet is provided which, when bonding to an adherend, not only excels in the ability to conform to steps or surface irregularities caused by a printing site, but also excels in workability such as cutting processability. A transparent double-sided self-adhesive sheet is proposed, having an intermediate resin layer (A) and pressure-sensitive adhesive layers (B) as front and reverse side layers, each of the layers being a layer having one or more species of (meth)acrylic acid ester series (co)polymer as the base resin, in which transparent double-sided self-adhesive sheet, the shear storage elastic modulus (G?(A)) at a frequency of 1 Hz of the intermediate resin layer (A) is higher than the pressure-sensitive adhesive layers (B) in a temperature range of 0° C. to 100° C., and, the indentation hardness (ASKER C2 hardness) of the entire sheet is 10 to 80.
    Type: Application
    Filed: June 28, 2019
    Publication date: October 31, 2019
    Applicant: MITSUBISHI CHEMICAL CORPORATION
    Inventors: Kahoru Niimi, Hidejirou Yoshikawa, Tetsuya Yamaoka, Makoto Inenaga
  • Patent number: 9574111
    Abstract: A novel transparent double-sided adhesive sheet for image display device is provided, that, under the constraint of holding down the thickness of the adhesive sheet to 250 ?m or less, can relieve a distortion arising within the adhesive sheet after laminating even if a member has a stepped portion of 50 ?m to 100 ?m in height on the laminating surface. Proposed is a transparent double-sided adhesive sheet for image display device which is used for the purpose of laminating an image display device constitutive member having on a laminating surface a stepped portion of 50 ?m to 100 ?m in height and a flat surface portion, and another image display device constitutive member, wherein a thickness of the maximum thickness portion of the adhesive sheet is 250 ?m or less, and a gel fraction (a) at a position in contact with a stepped portion after laminating is 10% or greater and smaller than a gel fraction (b) at a position in contact with a flat surface portion.
    Type: Grant
    Filed: August 8, 2014
    Date of Patent: February 21, 2017
    Assignee: MITSUBISHI PLASTICS, INC.
    Inventors: Kahoru Niimi, Hidejirou Yoshikawa, Takahisa Uchida, Makoto Inenaga
  • Patent number: 9441141
    Abstract: A novel transparent double-sided adhesive sheet for image display device is provided, that, under the constraint of holding down the thickness of the adhesive sheet to 250 ?m or less, can relieve a distortion arising within the adhesive sheet after laminating even if a member has a stepped portion of 50 ?m to 100 ?m in height on the laminating surface. Proposed is a transparent double-sided adhesive sheet for image display device which is used for the purpose of laminating an image display device constitutive member having on a laminating surface a stepped portion of 50 ?m to 100 ?m in height and a flat surface portion, and another image display device constitutive member, wherein a thickness of the maximum thickness portion of the adhesive sheet is 250 ?m or less, and a gel fraction (a) at a position in contact with a stepped portion after laminating is 10% or greater and smaller than a gel fraction (b) at a position in contact with a flat surface portion.
    Type: Grant
    Filed: August 8, 2014
    Date of Patent: September 13, 2016
    Assignee: MITSUBISHI PLASTICS, INC.
    Inventors: Kahoru Niimi, Hidejirou Yoshikawa, Takahisa Uchida, Makoto Inenaga
  • Patent number: 9353293
    Abstract: A novel transparent double-sided adhesive sheet for image display device is provided, that, under the constraint of holding down the thickness of the adhesive sheet to 250 ?m or less, can relieve a distortion arising within the adhesive sheet after laminating even if a member has a stepped portion of 50 ?m to 100 ?m in height on the laminating surface. Proposed is a transparent double-sided adhesive sheet for image display device which is used for the purpose of laminating an image display device constitutive member having on a laminating surface a stepped portion of 50 ?m to 100 ?m in height and a flat surface portion, and another image display device constitutive member, wherein a thickness of the maximum thickness portion of the adhesive sheet is 250 ?m or less, and a gel fraction (a) at a position in contact with a stepped portion after laminating is 10% or greater and smaller than a gel fraction (b) at a position in contact with a flat surface portion.
    Type: Grant
    Filed: December 27, 2012
    Date of Patent: May 31, 2016
    Assignee: MITSUBISHI PLASTICS, INC.
    Inventors: Kahoru Niimi, Hidejirou Yoshikawa, Takahisa Uchida, Makoto Inenaga
  • Publication number: 20150044423
    Abstract: A novel transparent double-sided adhesive sheet for image display device is provided, that, under the constraint of holding down the thickness of the adhesive sheet to 250 ?m or less, can relieve a distortion arising within the adhesive sheet after laminating even if a member has a stepped portion of 50 ?m to 100 ?m in height on the laminating surface. Proposed is a transparent double-sided adhesive sheet for image display device which is used for the purpose of laminating an image display device constitutive member having on a laminating surface a stepped portion of 50 ?m to 100 ?m in height and a flat surface portion, and another image display device constitutive member, wherein a thickness of the maximum thickness portion of the adhesive sheet is 250 ?m or less, and a gel fraction (a) at a position in contact with a stepped portion after laminating is 10% or greater and smaller than a gel fraction (b) at a position in contact with a flat surface portion.
    Type: Application
    Filed: December 27, 2012
    Publication date: February 12, 2015
    Applicant: MITSUBISHI PLASTICS, INC.
    Inventors: Kahoru Niimi, Hidejirou Yoshikawa, Takahisa Uchida, Makoto Inenaga
  • Publication number: 20140349100
    Abstract: A novel transparent double-sided adhesive sheet for image display device is provided, that, under the constraint of holding down the thickness of the adhesive sheet to 250 ?m or less, can relieve a distortion arising within the adhesive sheet after laminating even if a member has a stepped portion of 50 ?m to 100 ?m in height on the laminating surface. Proposed is a transparent double-sided adhesive sheet for image display device which is used for the purpose of laminating an image display device constitutive member having on a laminating surface a stepped portion of 50 ?m to 100 ?m in height and a flat surface portion, and another image display device constitutive member, wherein a thickness of the maximum thickness portion of the adhesive sheet is 250 ?m or less, and a gel fraction (a) at a position in contact with a stepped portion after laminating is 10% or greater and smaller than a gel fraction (b) at a position in contact with a flat surface portion.
    Type: Application
    Filed: August 8, 2014
    Publication date: November 27, 2014
    Applicant: Mitsubishi Plastics, Inc.
    Inventors: Kahoru NIIMI, Hidejirou Yoshikawa, Takahisa Uchida, Makoto Inenaga
  • Publication number: 20140349080
    Abstract: A novel transparent double-sided adhesive sheet for image display device is provided, that, under the constraint of holding down the thickness of the adhesive sheet to 250 ?m or less, can relieve a distortion arising within the adhesive sheet after laminating even if a member has a stepped portion of 50 ?m to 100 ?m in height on the laminating surface. Proposed is a transparent double-sided adhesive sheet for image display device which is used for the purpose of laminating an image display device constitutive member having on a laminating surface a stepped portion of 50 ?m to 100 ?m in height and a flat surface portion, and another image display device constitutive member, wherein a thickness of the maximum thickness portion of the adhesive sheet is 250 ?m or less, and a gel fraction (a) at a position in contact with a stepped portion after laminating is 10% or greater and smaller than a gel fraction (b) at a position in contact with a flat surface portion.
    Type: Application
    Filed: August 8, 2014
    Publication date: November 27, 2014
    Applicant: Mitsubishi Plastics, Inc.
    Inventors: Kahoru NIIMI, Hidejirou Yoshikawa, Takahisa Uchida, Makoto Inenaga
  • Publication number: 20120156456
    Abstract: A transparent double-sided self-adhesive sheet is provided which, when bonding to an adhered, not only excels in the ability to conform to steps or surface irregularities caused by a printing site, but also excels in workability such as cutting processability. A transparent double-sided self-adhesive sheet is proposed, having an intermediate resin layer (A) and pressure-sensitive adhesive layers (B) as front and reverse side layers, each of the layers being a layer having one or more species of (meth)acrylic acid ester series (co)polymer as the base resin, in which transparent double-sided self-adhesive sheet, the shear storage elastic modulus (G?(A)) at a frequency of 1 Hz of the intermediate resin layer (A) is higher than the pressure-sensitive adhesive layers (B) in a temperature range of 0° C. to 100° C., and, the indentation hardness (ASKER C2 hardness) of the entire sheet is 10 to 80.
    Type: Application
    Filed: April 1, 2011
    Publication date: June 21, 2012
    Applicant: MITSUBISHI PLASTICS, INC.
    Inventors: Kahoru Niimi, Hidejirou Yoshikawa, Tetsuya Yamaoka, Makoto Inenaga