Patents by Inventor Yoshikazu Soeda
Yoshikazu Soeda 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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Patent number: 10550298Abstract: Provided is a PSA sheet that provides highly reliable adhesion and great stretch removability from adherends. This invention provides a PSA sheet. The PSA sheet exhibits a shear adhesive strength of 0.5 MPa or greater, a tensile strength at break of 10 MPa or greater, and an elongation at break of 300% or greater.Type: GrantFiled: July 14, 2015Date of Patent: February 4, 2020Assignee: NITTO DENKO CORPORATIONInventors: Kenta Jozuka, Naoki Nakayama, Yoshikazu Soeda, Yasushi Buzojima, Naoaki Higuchi
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Publication number: 20170158918Abstract: Provided is a PSA sheet that provides highly reliable adhesion and great stretch removability from adherends. This invention provides a PSA sheet. The PSA sheet exhibits a shear adhesive strength of 0.5 MPa or greater, a tensile strength at break of 10 MPa or greater, and an elongation at break of 300% or greater.Type: ApplicationFiled: July 14, 2015Publication date: June 8, 2017Applicant: NITTO DENKO CORPORATIONInventors: Kenta JOZUKA, Naoki NAKAYAMA, Yoshikazu SOEDA, Yasushi BUZOJIMA, Naoaki HIGUCHI
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Patent number: 9624404Abstract: This invention provides a PSA sheet that allows prevention or reduction of damage such as fracture with efficient stretch removability. A stretchable PSA sheet is provided, comprising a PSA layer and a film-like substrate supporting the PSA layer. The PSA sheet has a long section. The long section has a tapered segment that extends, tapering to a first end of the length direction and the film-like substrate has a minimum cross-sectional area larger than 0.30 mm2 in the tapered segment.Type: GrantFiled: July 22, 2015Date of Patent: April 18, 2017Assignee: NITTO DENKO CORPORATIONInventors: Kenta Jozuka, Naoki Nakayama, Yoshimasa Nishida, Yoshikazu Soeda
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Publication number: 20170081559Abstract: A double-sided adhesive tape has an adhesive member which is formed in the shape of a film and whose both surfaces in a thickness direction have an adhesive force and a pair of separation films which are arranged so as to sandwich the adhesive member in the thickness direction. The double-sided adhesive tape is formed so as to have a non-planar shape and to reduce the occurrence of wrinkles in the adhesive member when the adhesive member is adhered to a non-planar adherend.Type: ApplicationFiled: December 6, 2016Publication date: March 23, 2017Inventors: Hiroki Nakahara, Yoshikazu Soeda
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Publication number: 20160024352Abstract: This invention provides a PSA sheet that allows prevention or reduction of damage such as fracture with efficient stretch removability. A stretchable PSA sheet is provided, comprising a PSA layer and a film-like substrate supporting the PSA layer. The PSA sheet has a long section. The long section has a tapered segment that extends, tapering to a first end of the length direction and the film-like substrate has a minimum cross-sectional area larger than 0.30 mm2 in the tapered segment.Type: ApplicationFiled: July 22, 2015Publication date: January 28, 2016Applicant: NITTO DENKO CORPORATIONInventors: Kenta JOZUKA, Naoki NAKAYAMA, Yoshimasa NISHIDA, Yoshikazu SOEDA
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Patent number: 8673443Abstract: The present invention relates to a pressure-sensitive adhesive tape or sheet having a light-reflective property and/or a light-shielding property, which includes a base material and at least one pressure-sensitive adhesive layer disposed on at least one surface of the base material. The pressure-sensitive adhesive layer is formed by an acrylic pressure-sensitive adhesive composition containing an acrylic polymer (a) and a low-molecular weight polymer component (b) which contains, as a principal monomer component, an ethylenic unsaturated monomer having a glass transition temperature of from 60 to 190° C. when it is formed into a homopolymer and having a cyclic structure within the molecule thereof, and which has a weight-average molecular weight equal to or higher than 3,000 but lower than 20,000. The pressure-sensitive adhesive layer has a gel fraction of from 51 to 75 wt % and a temperature, at a maximum of loss tangent (tan ?), of from ?14 to 25° C.Type: GrantFiled: February 21, 2007Date of Patent: March 18, 2014Assignee: Nitto Denko CorporationInventors: Junji Yokoyama, Yoshikazu Soeda, Yutaka Tosaki, Koichi Ikeda
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Publication number: 20140023861Abstract: A pressure-sensitive adhesive sheet including a plastic substrate having a thickness of more than 0 ?m and less than 2.0 ?m and a pressure-sensitive adhesive layer on at least one side of the plastic substrate. The pressure-sensitive adhesive layer contains an acrylic polymer or a rubber-based polymer in an amount of 50 wt % or more relative to a total amount of the pressure-sensitive adhesive layer. The acrylic polymer is formed of a monomer mixture containing the specific alkyl (meth)acrylate monomer in an amount of 50.0 to 99.8 wt % relative to a total amount of monomer components and a polar group-containing monomer in an amount of 0.01 to 20 wt % relative to the total amount of monomer components.Type: ApplicationFiled: July 18, 2013Publication date: January 23, 2014Applicant: NITTO DENKO CORPORATIONInventors: Masaaki SATOU, Yoshikazu SOEDA, Hiroshi WADA
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Publication number: 20130101819Abstract: A double-sided adhesive tape comprises: a base member configured as a non-foamed thermoplastic film having a thickness of 50 ?m or more; and acrylic pressure-sensitive adhesive layers provided to both faces of the base member. The double-sided adhesive tape has a 50% modulus ranging from 3.0 MPa or more to 40.0 MPa or less.Type: ApplicationFiled: October 19, 2012Publication date: April 25, 2013Inventors: Toshihide SUZUKI, Yoshikazu SOEDA, Akinori TAMURA, Naoki NAKAYAMA
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Publication number: 20130101842Abstract: A pressure-sensitive adhesive tape includes a substrate layer, a colored layer, and a pressure-sensitive adhesive layer. The substrate layer is formed of a plastic material, such as polyethylene terephthalate. The colored layer is laminated on one major surface of the substrate layer. The colored layer is a black printed layer formed by printing, for example, black ink. The pressure-sensitive adhesive layer is laminated on the other major surface of the substrate layer. An acrylic polymer is preferably used as the pressure-sensitive adhesive layer. In the pressure-sensitive adhesive tape, a specular reflectance of visible light on the surface near to the colored layer is 2.0% or smaller.Type: ApplicationFiled: October 19, 2012Publication date: April 25, 2013Inventors: Noboru YOSHIDA, Takahisa MIZUTORI, Kenta JOZUKA, Yoshikazu SOEDA
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Publication number: 20130095309Abstract: A double-sided pressure-sensitive adhesive tape according to an embodiment contains a solvent-type acrylic copolymer, in which the total thickness of the tape is 150 ?m or less and a mass increase after being dipped in artificial sebum under an atmosphere at 55° C. for 3 days is 10% by mass or more and 150% by mass or less.Type: ApplicationFiled: October 12, 2012Publication date: April 18, 2013Inventors: Toshihide SUZUKI, Yoshikazu SOEDA, Noboru YOSHIDA, Takahisa MIZUTORI
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Publication number: 20120034443Abstract: A pressure-sensitive adhesive tape includes a substrate layer made of a plastic material, etc., and a pressure-sensitive adhesive layer provided on at least one of the surfaces of the substrate layer. The pressure sensitive adhesive tape has the thermal resistance at 80° C. of less than 2.00 [cm2*K/W] and the total thickness of the substrate layer and the pressure-sensitive adhesive layer of less than 10 ?m. In addition, the pressure-sensitive adhesive layer may be provided on both surfaces of the substrate layer. The total thickness of the substrate layer and the pressure-sensitive adhesive layer may be less than 6 ?m.Type: ApplicationFiled: August 4, 2011Publication date: February 9, 2012Applicant: NITTO DENKO CORPORATIONInventors: Yoshikazu SOEDA, Kenta JOZUKA, Noboru YOSHIDA, Takahisa MIZUTORI, Toshihide SUZUKI
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Publication number: 20110117362Abstract: There is provided a pressure-sensitive adhesive tape that can exhibit good adhesion property and prevent display unevenness, which would otherwise be caused by deformation of the adherend fixed with it, even when exposed to environmental changes such as increases and decreases in temperature. The pressure-sensitive adhesive tape includes a pressure-sensitive adhesive layer comprising a pressure-sensitive adhesive composition containing a (meth)acryl-based polymer that comprises a monomer component of at least an alkyl (meth)acrylate ester having an alkyl group of 4 to 12 carbon atoms, wherein the pressure-sensitive adhesive composition contains 100 parts by weight of the (meth)acryl-based polymer and 5 to 50 parts by weight of a rosin resin, and the pressure-sensitive adhesive layer has a stress-strain curve with a maximum stress of 1.2 to 3.5 N/mm2 and a maximum elongation of 700 to 1,300% at 0° C.Type: ApplicationFiled: November 15, 2010Publication date: May 19, 2011Inventors: Noboru Yoshida, Tatsuya Tsukagoshi, Yoshikazu Soeda, Yutaka Tosaki, Junji Yokoyama
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Publication number: 20100330354Abstract: The present invention provides a pressure-sensitive adhesive tape capable of exhibiting excellent adhesive property, and of inhibiting deformation of an adherend fixed with this pressure-sensitive adhesive tape, even under a high temperature or low temperature environment. The pressure-sensitive adhesive tape is one having a pressure-sensitive adhesive layer including a pressure-sensitive adhesive composition containing a (meth)acrylic polymer, wherein the (meth)acrylic polymer is obtained by copolymerization of a monomer mixture containing, at least, 60 to 96% by weight of a (meth)acrylic acid alkyl ester having an alkyl group with 4 to 12 carbon atoms, 2 to 10% by weight of a carboxyl group-containing monomer, and 2 to 8% by weight of an ethylenically unsaturated monomer having no carboxyl group, whose homopolymer has a glass transition temperature of 50 to 190° C. as monomer components, and the pressure-sensitive adhesive layer has a gel fraction of 0 to 30% by weight.Type: ApplicationFiled: June 23, 2010Publication date: December 30, 2010Inventors: Tatsuya Tsukagoshi, Yutaka Tosaki, Junji Yokoyama, Yoshikazu Soeda, Noboru Yoshida
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Patent number: 7655106Abstract: The double-sided pressure-sensitive adhesive tape or sheet is a double-sided pressure-sensitive adhesive tape or sheet containing a support having a pressure-sensitive adhesive layer on the both surfaces thereof, characterized in that the double-sided pressure-sensitive adhesive tape or sheet has a total thickness including the thickness of the support and the two pressure-sensitive adhesive layers formed on the both surfaces of the support of 0.003 mm or more and less than 0.03 mm and a breaking strength of from 2 to 26 MPa/10 mm-width. The support preferably has a thickness of from 0.002 to 0.012 mm. As the support, plastic films (especially, a polyethylene terephthalate film) are suitable. The double-sided pressure-sensitive adhesive tape or sheet may have a length of 5 m or more and have a roll-wound form.Type: GrantFiled: September 23, 2004Date of Patent: February 2, 2010Assignee: Nitto Denko CorporationInventors: Naoyuki Nishiyama, Yoshikazu Soeda, Hironori Tamai, Hiroshi Wada, Kazuyuki Yagura, Hiroshi Yamamoto
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Publication number: 20090324868Abstract: Disclosed is a double-faced pressure-sensitive adhesive tape or sheet including a substrate and, respectively arranged on both sides thereof, two pressure-sensitive adhesive layers. The thickness from the surface of one of the two pressure-sensitive adhesive layers to that of the other pressure-sensitive adhesive layer is 25 ?m or less. The two pressure-sensitive adhesive layers have different adhesive strengths, and a pressure-sensitive adhesive layer having a lower adhesive strength has a tack in terms of ball number 3 or greater as determined according to the inclined type ball tack testing method specified in JIS Z 0237 at an inclination angle of 30°, a temperature of 23° C., and relative humidity of 65%. The substrate preferably has a thickness of 10 ?m or less and more preferably has a thickness of 3 ?m or less. Each of the two pressure-sensitive adhesive layers preferably has a thickness of 6 ?m or less.Type: ApplicationFiled: August 8, 2007Publication date: December 31, 2009Applicant: NITTO DENKO CORPORATIONInventors: Hironori Tamai, Yoshikazu Soeda
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Publication number: 20090148645Abstract: The double-sided pressure-sensitive adhesive tape or sheet is a double-sided pressure-sensitive adhesive tape or sheet containing a support having a pressure-sensitive adhesive layer on the both surfaces thereof, characterized in that the double-sided pressure-sensitive adhesive tape or sheet has a total thickness including the thickness of the support and the two pressure-sensitive adhesive layers formed on the both surfaces of the support of 0.003 mm or more and less than 0.03 mm and a breaking strength of from 2 to 26 MPa/10 mm-width. The support preferably has a thickness of from 0.002 to 0.012 mm. As the support, plastic films (especially, a polyethylene terephthalate film) are suitable. The double-sided pressure-sensitive adhesive tape or sheet may have a length of 5 m or more and have a roll-wound form.Type: ApplicationFiled: January 8, 2009Publication date: June 11, 2009Inventors: Naoyuki Nishiyama, Yoshikazu Soeda, Hironori Tamai, Hiroshi Wada, Kazuyuki Yagura, Hiroshi Yamamoto
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Patent number: 7402336Abstract: A pressure-sensitive adhesive tape contains a substrate and a pressure-sensitive adhesive layer disposed on at least one side of the substrate, wherein the substrate contains colored layers containing a silver layer, a layer of a color other than silver and black, and a black layer which are superposed in this order.Type: GrantFiled: January 25, 2005Date of Patent: July 22, 2008Assignee: Nitto Denko CorporationInventors: Junji Yokoyama, Yoshikazu Soeda
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Patent number: 7399527Abstract: A pressure-sensitive adhesive tape contains a substrate and a pressure-sensitive adhesive layer disposed on at least one side of the substrate, wherein the substrate contains colored layers containing a white layer, a layer of a color other than white and black, and a black layer which are superposed in this order.Type: GrantFiled: July 22, 2003Date of Patent: July 15, 2008Assignee: Nitto Denko CorporationInventors: Akiko Miyano, Junji Yokoyama, Yoshikazu Soeda
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Publication number: 20070218276Abstract: The present invention relates to a double-faced pressure-sensitive adhesive tape or sheet, which comprises: a base material; a pressure-sensitive adhesive layer disposed on one surface of the base material, which is a pressure-sensitive adhesive layer (A) including a pressure-sensitive adhesive composition containing an acrylic polymer (A1), and a silicone rubber fine particle (A2) in a proportion of from 3 to 50 parts by weight with respect to 100 parts by weight of the acrylic polymer (A1), the layer (A) being used so as to adhere to the liquid crystal display module unit; and another pressure-sensitive adhesive layer disposed on the other surface of the base material, which is a pressure-sensitive adhesive layer (B) including a pressure-sensitive adhesive composition containing an acrylic polymer (B1), and a low-molecular weight polymer component (B2), which contains, as a principal monomer component, an ethylenic unsaturated monomer having a glass transition temperature of from 60 to 190° C.Type: ApplicationFiled: March 15, 2007Publication date: September 20, 2007Applicant: NITTO DENKO CORPORATIONInventors: Tsuyoshi Hiramatsu, Yutaka Tosaki, Junji Yokoyama, Yoshikazu Soeda
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Publication number: 20070196647Abstract: The present invention relates to a pressure-sensitive adhesive tape or sheet having a light-reflective property and/or a light-shielding property, which comprises a base material and at least one pressure-sensitive adhesive layer disposed on at least one surface of the base material, in which the pressure-sensitive adhesive layer is formed by an acrylic pressure-sensitive adhesive composition containing an acrylic polymer (a) and a low-molecular weight polymer component (b) which contains, as a principal monomer component, an ethylenic unsaturated monomer having a glass transition temperature of from 60 to 190° C. when it is formed into a homopolymer and having a cyclic structure within the molecule thereof, and which has a weight-average molecular weight equal to or higher than 3,000 but lower than 20,000; in which the pressure-sensitive adhesive layer has a gel fraction of from 51 to 75 wt % and a temperature, at a maximum of loss tangent (tan ?), of from ?14 to 25° C.Type: ApplicationFiled: February 21, 2007Publication date: August 23, 2007Applicant: NITTO DENKO CORPORATIONInventors: Junji Yokoyama, Yoshikazu Soeda, Yutaka Tosaki, Koichi Ikeda