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: 20210309890Abstract: 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: ApplicationFiled: August 19, 2019Publication date: October 7, 2021Applicant: NITTO DENKO CORPORATIONInventors: Shusaku UENO, Takumi YUTOU, Takamasa HIRAYAMA
-
Publication number: 20210309889Abstract: 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: ApplicationFiled: August 19, 2019Publication date: October 7, 2021Applicant: NITTO DENKO CORPORATIONInventors: Shusaku UENO, Takumi YUTOU, Takamasa HIRAYAMA
-
Patent number: 9834706Abstract: 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: GrantFiled: February 24, 2015Date of Patent: December 5, 2017Assignee: NITTO DENKO CORPORATIONInventors: Takumi Yutou, Minoru Hanaoka
-
Patent number: 9460952Abstract: 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: GrantFiled: February 8, 2013Date of Patent: October 4, 2016Assignee: NITTO DENKO CORPORATIONInventors: Takumi Yutou, Toshitaka Suzuki, Masato Shirai, Masahiko Ando, Yuka Sekiguchi, Ryoko Asai, Asuka Endo, Rie Hayashiuchi
-
Publication number: 20150259576Abstract: 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: ApplicationFiled: February 24, 2015Publication date: September 17, 2015Applicant: NITTO DENKO CORPORATIONInventors: Takumi YUTOU, Minoru HANAOKA
-
Publication number: 20140193611Abstract: 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: ApplicationFiled: March 6, 2014Publication date: July 10, 2014Applicant: NITTO DENKO CORPORATIONInventors: Takumi Yutou, Shinichi Takada, Mitsushi Yamamoto, Kazuhito Okumura
-
Publication number: 20140178620Abstract: 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: ApplicationFiled: February 8, 2013Publication date: June 26, 2014Inventors: Takumi Yutou, Toshitaka Suzuki, Masato Shirai, Masahiko Ando, Yuka Sekiguchi, Ryoko Asai, Asuka Endo, Rie Hayashiuchi
-
Publication number: 20140154450Abstract: 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: ApplicationFiled: March 2, 2012Publication date: June 5, 2014Applicants: NITTO EUROPE N.V., NITTO DENKO CORPORATIONInventors: Takumi Yutou, Fumiteru Asai, Toshio Shintani, Toshitaka Suzuki, Minoru Hanaoka, Edwin Thys, Bart Forier
-
Patent number: 8685523Abstract: 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: GrantFiled: October 1, 2007Date of Patent: April 1, 2014Assignee: Nitto Denko CorporationInventors: Takumi Yutou, Shinichi Takada, Mitsushi Yamamoto, Kazuhito Okumura
-
Publication number: 20130108867Abstract: 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: ApplicationFiled: July 7, 2011Publication date: May 2, 2013Applicant: NITTO DENKO CORPORATIONInventors: Shigeki Ishiguro, Takumi Yutou, Hiroki Senda, Masamichi Matsumoto, Yuka Sekiguchi, Aya Nagatomo, Yuji Okawa, Fumiteru Asai, Michihito Ooishi, Toshimasa Sugimura
-
Publication number: 20110244160Abstract: 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: ApplicationFiled: March 29, 2011Publication date: October 6, 2011Applicant: NITTO DENKO CORPORATIONInventors: Shigeki ISHIGURO, Takumi Yutou, Hiroki Senda, Masamichi Matsumoto, Kenichi Nishijima, Ryoko Asai, Yuka Sekiguchi, Yuji Okawa, Michihito Ooishi, Toshimasa Sugimura
-
Publication number: 20110244229Abstract: 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: ApplicationFiled: March 29, 2011Publication date: October 6, 2011Applicant: NITTO DENKO CORPORATIONInventors: Shigeki ISHIGURO, Takumi YUTOU, Hiroki SENDA, Masamichi MATSUMOTO, Kenichi NISHIJIMA, Toshitaka SUZUKI, Fumiteru ASAI, Isamu MIYOSHI, Michihito OOISHI, Toshimasa SUGIMURA
-
Publication number: 20100323156Abstract: 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: ApplicationFiled: October 1, 2007Publication date: December 23, 2010Inventors: Takumi Yutou, Shinichi Takada, Mitsushi Yamamoto, Kazuhito Okumura
-
Publication number: 20080102241Abstract: 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: ApplicationFiled: October 30, 2007Publication date: May 1, 2008Inventors: Takumi Yutou, Shinichi Takada, Mitsushi Yamamoto, Kazuhito Okumura