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).
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Publication number: 20230109620Abstract: 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: ApplicationFiled: December 12, 2022Publication date: April 6, 2023Applicant: MITSUBISHI CHEMICAL CORPORATIONInventors: Kahoru NIIMI, Hidejirou YOSHIKAWA, Tetsuya YAMAOKA, Makoto INENAGA
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Patent number: 11535777Abstract: 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: GrantFiled: September 20, 2019Date of Patent: December 27, 2022Assignee: Mitsubishi Chemical CorporationInventors: Takahisa Uchida, Naoya Miara, Hidejirou Yoshikawa, Ryouta Yamamoto, Shinya Fukuda
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Publication number: 20190329536Abstract: 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: ApplicationFiled: June 28, 2019Publication date: October 31, 2019Applicant: MITSUBISHI CHEMICAL CORPORATIONInventors: Kahoru Niimi, Hidejirou Yoshikawa, Tetsuya Yamaoka, Makoto Inenaga
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Patent number: 9574111Abstract: 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: GrantFiled: August 8, 2014Date of Patent: February 21, 2017Assignee: MITSUBISHI PLASTICS, INC.Inventors: Kahoru Niimi, Hidejirou Yoshikawa, Takahisa Uchida, Makoto Inenaga
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Patent number: 9441141Abstract: 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: GrantFiled: August 8, 2014Date of Patent: September 13, 2016Assignee: MITSUBISHI PLASTICS, INC.Inventors: Kahoru Niimi, Hidejirou Yoshikawa, Takahisa Uchida, Makoto Inenaga
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Patent number: 9353293Abstract: 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: GrantFiled: December 27, 2012Date of Patent: May 31, 2016Assignee: MITSUBISHI PLASTICS, INC.Inventors: Kahoru Niimi, Hidejirou Yoshikawa, Takahisa Uchida, Makoto Inenaga
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Publication number: 20150044423Abstract: 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: ApplicationFiled: December 27, 2012Publication date: February 12, 2015Applicant: MITSUBISHI PLASTICS, INC.Inventors: Kahoru Niimi, Hidejirou Yoshikawa, Takahisa Uchida, Makoto Inenaga
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Publication number: 20140349100Abstract: 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: ApplicationFiled: August 8, 2014Publication date: November 27, 2014Applicant: Mitsubishi Plastics, Inc.Inventors: Kahoru NIIMI, Hidejirou Yoshikawa, Takahisa Uchida, Makoto Inenaga
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Publication number: 20140349080Abstract: 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: ApplicationFiled: August 8, 2014Publication date: November 27, 2014Applicant: Mitsubishi Plastics, Inc.Inventors: Kahoru NIIMI, Hidejirou Yoshikawa, Takahisa Uchida, Makoto Inenaga
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Publication number: 20120156456Abstract: 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: ApplicationFiled: April 1, 2011Publication date: June 21, 2012Applicant: MITSUBISHI PLASTICS, INC.Inventors: Kahoru Niimi, Hidejirou Yoshikawa, Tetsuya Yamaoka, Makoto Inenaga