Patents by Inventor Takumi Yutou

Takumi Yutou 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: 20210309889
    Abstract: Provided is a pressure-sensitive adhesive sheet that may be used for the grinding of a hard and brittle substrate in a backgrinding step for the hard and brittle substrate, the pressure-sensitive adhesive sheet being excellent in all of grinding accuracy, low contamination property, productivity, and fixing property. The pressure-sensitive adhesive sheet of the present invention includes a pressure-sensitive adhesive layer, wherein the pressure-sensitive adhesive layer contains: a pressure-sensitive adhesive containing a base polymer; and a foaming agent having a foaming temperature of 90° C. or more, and wherein the pressure-sensitive adhesive sheet has, when a pressure-sensitive adhesive surface thereof is bonded to a silicon chip, a shear adhesive strength of 1.0 MPa or more under an ambient temperature of 25° C., and a shear adhesive strength of 0.2 MPa or more under an ambient temperature of 80° C.
    Type: Application
    Filed: August 19, 2019
    Publication date: October 7, 2021
    Applicant: NITTO DENKO CORPORATION
    Inventors: Shusaku UENO, Takumi YUTOU, Takamasa HIRAYAMA
  • Publication number: 20210309890
    Abstract: Provided is a pressure-sensitive adhesive sheet that may be used for the grinding of a hard and brittle substrate in a backgrinding step for the hard and brittle substrate, the pressure-sensitive adhesive sheet being excellent in all of low contamination property, productivity, grinding accuracy, and peelability. The pressure-sensitive adhesive sheet of the present invention includes a pressure-sensitive adhesive layer, wherein the pressure-sensitive adhesive layer has a thickness of from 1 ?m to 300 ?m, and wherein a microhardness H (Pa) of the pressure-sensitive adhesive layer at 25° C. and the thickness, which is represented by hA (?m), of the pressure-sensitive adhesive layer satisfy a relationship represented by the following expression (1). log H?1.9385×log hA+4.2611 . . .
    Type: Application
    Filed: August 19, 2019
    Publication date: October 7, 2021
    Applicant: NITTO DENKO CORPORATION
    Inventors: Shusaku UENO, Takumi YUTOU, Takamasa HIRAYAMA
  • Patent number: 9834706
    Abstract: A pressure-sensitive adhesive tape that uses, as a plasticizer, an alternative compound to bis(2-ethylhexyl) phthalate (DOP) and dibutyl phthalate (DBP), having excellent tackiness, and can be unwound satisfactorily, where DOP and DBP are to be restricted under the REACH regulation. The pressure-sensitive adhesive tape includes a poly(vinyl chloride) substrate and a pressure-sensitive adhesive layer. The pressure-sensitive adhesive layer is disposed on or over one side of the substrate. The poly(vinyl chloride) substrate contains 10 to 40 percent by weight of bis(2-ethylhexyl) terephthalate. The pressure-sensitive adhesive tape preferably has an unwinding force of 0.4 N/20 mm or less at a tensile speed of 0.3 m/min and an unwinding force of 1.2 N/20 mm or less at a tensile speed of 30 m/min.
    Type: Grant
    Filed: February 24, 2015
    Date of Patent: December 5, 2017
    Assignee: NITTO DENKO CORPORATION
    Inventors: Takumi Yutou, Minoru Hanaoka
  • Patent number: 9460952
    Abstract: A film for a pressure-sensitive adhesive tape is a film for a pressure-sensitive adhesive tape, including a non-pressure-sensitive adhesive layer on one surface of a plastic film, where the non-pressure-sensitive adhesive layer includes a mixed layer of a silicone and a (meth)acrylic polymer; and the (meth)acrylic polymer has a calculated Tg of 10° C. or more.
    Type: Grant
    Filed: February 8, 2013
    Date of Patent: October 4, 2016
    Assignee: NITTO DENKO CORPORATION
    Inventors: Takumi Yutou, Toshitaka Suzuki, Masato Shirai, Masahiko Ando, Yuka Sekiguchi, Ryoko Asai, Asuka Endo, Rie Hayashiuchi
  • Publication number: 20150259576
    Abstract: Disclosed is a pressure-sensitive adhesive tape that uses, as a plasticizer, an alternative compound to bis(2-ethylhexyl)phthalate (DOP) and dibutyl phthalate (DBP), has excellent tackiness, and can be unwound satisfactorily, where DOP and DBP are to be restricted under the REACH regulation. The pressure-sensitive adhesive tape includes a poly(vinyl chloride) substrate and a pressure-sensitive adhesive layer. The pressure-sensitive adhesive layer is disposed on or over one side of the substrate. The poly(vinyl chloride) substrate contains 10 to 40 percent by weight of bis(2-ethylhexyl)terephthalate. The pressure-sensitive adhesive tape preferably has an unwinding force of 0.4 N/20 mm or less at a tensile speed of 0.3 m/min and an unwinding force of 1.2 N/20 mm or less at a tensile speed of 30 m/min.
    Type: Application
    Filed: February 24, 2015
    Publication date: September 17, 2015
    Applicant: NITTO DENKO CORPORATION
    Inventors: Takumi YUTOU, Minoru HANAOKA
  • Publication number: 20140193611
    Abstract: There are provided an optical surface protection film capable of permitting even a visual inspection of a coated body having a fine roughness, such as a prism sheet, to be performed under the condition that the protection film is attached to the coated body and excelling in adhesion reliability without an optical adverse effect on the coated body, and an optical film with the surface protection film. The optical surface protection film (1) has a base material layer (10) and an adhesive layer (12) stacked on one surface of the base material layer. The surface of the base material layer (10) on the side of the adhesive layer (12) has an arithmetic surface average roughness (Ra2) of 0.65 ?m or less. The other surface of the base material layer (10) has an arithmetic surface average roughness (Ra1) of 0.6 ?m or more.
    Type: Application
    Filed: March 6, 2014
    Publication date: July 10, 2014
    Applicant: NITTO DENKO CORPORATION
    Inventors: Takumi Yutou, Shinichi Takada, Mitsushi Yamamoto, Kazuhito Okumura
  • Publication number: 20140178620
    Abstract: Provided is the following film for a pressure-sensitive adhesive tape in which a non-pressure-sensitive adhesive layer is provided on a base material film. In the case where dicing or the like is performed by performing adsorption fixation to a fixing base with a negative pressure, the occurrence of excessive close adhesion due to, for example, the heat generation of the base can be effectively suppressed. In addition, the non-pressure-sensitive adhesive layer is provided on the base material film, and hence blocking in a roll shape is effectively suppressed, the film for a pressure-sensitive adhesive tape does not tear or break upon its unwinding from the roll shape, conformity between the non-pressure-sensitive adhesive layer and the base material film is good, and followability to a deformation such as stretching is good. Also provided is a pressure-sensitive adhesive tape including such film for a pressure-sensitive adhesive tape.
    Type: Application
    Filed: February 8, 2013
    Publication date: June 26, 2014
    Inventors: Takumi Yutou, Toshitaka Suzuki, Masato Shirai, Masahiko Ando, Yuka Sekiguchi, Ryoko Asai, Asuka Endo, Rie Hayashiuchi
  • Publication number: 20140154450
    Abstract: A polyvinyl chloride-based adhesive tape or sheet has a base material layer formed to include 10 to 40 parts by weight of plasticizing agent(s) in relation to 100 parts by weight of a polyvinyl chloride-based resin and an adhesive layer on one surface of the base material layer, the plasticizing agent includes at least one type of plasticizing agent having an SP value of at least 9.0.
    Type: Application
    Filed: March 2, 2012
    Publication date: June 5, 2014
    Applicants: NITTO EUROPE N.V., NITTO DENKO CORPORATION
    Inventors: Takumi Yutou, Fumiteru Asai, Toshio Shintani, Toshitaka Suzuki, Minoru Hanaoka, Edwin Thys, Bart Forier
  • Patent number: 8685523
    Abstract: There are provided an optical surface protection film capable of permitting even a visual inspection of a coated body having a fine roughness, such as a prism sheet, to be performed under the condition that the protection film is attached to the coated body and excelling in adhesion reliability without an optical adverse effect on the coated body, and an optical film with the surface protection film. The optical surface protection film (1) has a base material layer (10) and an adhesive layer (12) stacked on one surface of the base material layer. The surface of the base material layer (10) on the side of the adhesive layer (12) has an arithmetic surface average roughness (Ra2) of 0.65 ?m or less. The other surface of the base material layer (10) has an arithmetic surface average roughness (Ra1) of 0.6 ?m or more.
    Type: Grant
    Filed: October 1, 2007
    Date of Patent: April 1, 2014
    Assignee: Nitto Denko Corporation
    Inventors: Takumi Yutou, Shinichi Takada, Mitsushi Yamamoto, Kazuhito Okumura
  • Publication number: 20130108867
    Abstract: The present invention provides a methylenebis(fatty acid amide) composition containing as a main component a methylenebis(fatty acid amide) obtained by reacting a fatty acid monoamide with formaldehyde, a content of impurities which consist of the fatty acid monoamide and a fatty acid from which the fatty acid monoamide is constituted is 0 to less than 2 wt %, and a adhesive sheet containing the methylenebis(fatty acid amide) composition.
    Type: Application
    Filed: July 7, 2011
    Publication date: May 2, 2013
    Applicant: NITTO DENKO CORPORATION
    Inventors: Shigeki Ishiguro, Takumi Yutou, Hiroki Senda, Masamichi Matsumoto, Yuka Sekiguchi, Aya Nagatomo, Yuji Okawa, Fumiteru Asai, Michihito Ooishi, Toshimasa Sugimura
  • Publication number: 20110244229
    Abstract: A rolled adhesive tape or sheet which is wound in a rolled configuration having; a thermoplastic resin film, and a pressure sensitive adhesive layer formed on one side of the thermoplastic resin film, a fatty acid bisamide as well as a fatty acid monoamide and/or fatty acid are contained at least one of the thermoplastic resin film and the pressure sensitive adhesive layer.
    Type: Application
    Filed: March 29, 2011
    Publication date: October 6, 2011
    Applicant: NITTO DENKO CORPORATION
    Inventors: Shigeki ISHIGURO, Takumi YUTOU, Hiroki SENDA, Masamichi MATSUMOTO, Kenichi NISHIJIMA, Toshitaka SUZUKI, Fumiteru ASAI, Isamu MIYOSHI, Michihito OOISHI, Toshimasa SUGIMURA
  • Publication number: 20110244160
    Abstract: An adhesive tape or sheet with a release liner has; a thermoplastic resin film, a pressure sensitive adhesive layer formed on one side of the thermoplastic resin film, and a release liner positioned on one side of the pressure sensitive adhesive layer, a fatty acid bisamide as well as a fatty acid monoamide and/or fatty acid are contained at least one of the thermoplastic resin film and the pressure sensitive adhesive layer.
    Type: Application
    Filed: March 29, 2011
    Publication date: October 6, 2011
    Applicant: NITTO DENKO CORPORATION
    Inventors: Shigeki ISHIGURO, Takumi Yutou, Hiroki Senda, Masamichi Matsumoto, Kenichi Nishijima, Ryoko Asai, Yuka Sekiguchi, Yuji Okawa, Michihito Ooishi, Toshimasa Sugimura
  • Publication number: 20100323156
    Abstract: There are provided an optical surface protection film capable of permitting even a visual inspection of a coated body having a fine roughness, such as a prism sheet, to be performed under the condition that the protection film is attached to the coated body and excelling in adhesion reliability without an optical adverse effect on the coated body, and an optical film with the surface protection film. The optical surface protection film (1) has a base material layer (10) and an adhesive layer (12) stacked on one surface of the base material layer. The surface of the base material layer (10) on the side of the adhesive layer (12) has an arithmetic surface average roughness (Ra2) of 0.65 ?m or less. The other surface of the base material layer (10) has an arithmetic surface average roughness (Ra1) of 0.6 ?m or more.
    Type: Application
    Filed: October 1, 2007
    Publication date: December 23, 2010
    Inventors: Takumi Yutou, Shinichi Takada, Mitsushi Yamamoto, Kazuhito Okumura
  • Publication number: 20080102241
    Abstract: To present a surface protecting film low in peeling strength (rewinding force) on own back side even by using a rubber material pressure-sensitive adhesive, and excellent in adhesion reliance on an adherend, and an optical film using such surface protecting film. A surface protecting film having a pressure-sensitive adhesive layer laminated at one side of a base layer, and a backside treatment layer at other side of the base layer, in which the pressure-sensitive adhesive layer is formed of a rubber material, and the backside treatment layer is formed of an acrylic silicone graft polymer.
    Type: Application
    Filed: October 30, 2007
    Publication date: May 1, 2008
    Inventors: Takumi Yutou, Shinichi Takada, Mitsushi Yamamoto, Kazuhito Okumura