Patents by Inventor Masataka NISHIWAKI

Masataka NISHIWAKI 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).

  • Patent number: 11891551
    Abstract: A double-sided pressure-sensitive adhesive tape having excellent impact resistance, excellent reworkability, and excellent alcohol resistance. The double-sided pressure-sensitive adhesive tape includes: a base material layer; and pressure-sensitive adhesive layers arranged on both surface sides of the base material layer, wherein the pressure-sensitive adhesive layers are each formed from a pressure-sensitive adhesive composition, wherein the pressure-sensitive adhesive composition contains at least one kind selected from the group consisting of a monomer component (m) and a polymer component (P) obtained by polymerizing the monomer component (m), wherein the monomer component (m) contains 50 wt % or more of butyl (meth)acrylate, wherein a ratio of a thickness of the base material layer to a total thickness of the double-sided pressure-sensitive adhesive tape is less than 35%, and wherein the double-sided pressure-sensitive adhesive tape has a force, which is generated at 100% strain at 23° C.
    Type: Grant
    Filed: October 14, 2020
    Date of Patent: February 6, 2024
    Assignee: NITTO DENKO CORPORATION
    Inventors: Takuya Fujita, Hiromichi Sumida, Masahito Niwa, Masataka Nishiwaki, Yasushi Buzojima
  • Publication number: 20230323161
    Abstract: To provide a PSA sheet capable of providing good concealment to an adherend whose surface to which the PSA sheet is applied has been processed. Provided is a PSA sheet having a PSA layer. The PSA layer has a light transmittance of 20% or lower and an L* value of 20 or higher and 70 or lower, defined in the L*a*b* color space.
    Type: Application
    Filed: January 26, 2021
    Publication date: October 12, 2023
    Applicant: NITTO DENKO CORPORATION
    Inventors: Masataka NISHIWAKI, Toshiki IKAMI, Keigo SHIMOOKA
  • Publication number: 20230312992
    Abstract: Provided is a PSA sheet having limited light transmission with reduced PSA-entering light. A PSA sheet having a PSA layer is provided. The PSA layer comprising at least two species of colorants. The PSA layer has a light transmittance of 30% or lower and a light reflectance of 8% or higher.
    Type: Application
    Filed: December 17, 2020
    Publication date: October 5, 2023
    Applicant: NITTO DENKO CORPORATION
    Inventors: Masataka NISHIWAKI, Toshiki IKAMI, Keigo SHIMOOKA
  • Publication number: 20230312999
    Abstract: Provided is a pressure-sensitive adhesive sheet which has such light-transmitting properties that the pressure-sensitive adhesive sheet hides an adherend and the surface of the adherend can be inspected through the pressure-sensitive adhesive sheet. The pressure-sensitive adhesive sheet includes a pressure-sensitive adhesive layer. The pressure-sensitive adhesive layer contains at least two colorants. The pressure-sensitive adhesive sheet has a total light transmittance of 5% or greater. The pressure-sensitive adhesive layer has a haze of 20 or greater.
    Type: Application
    Filed: January 26, 2021
    Publication date: October 5, 2023
    Applicant: NITTO DENKO CORPORATION
    Inventors: Masataka NISHIWAKI, Toshiki IKAMI, Keigo SHIMOOKA
  • Publication number: 20230295468
    Abstract: Provided is a novel PSA sheet having good impact resistance as well as an increased refractive index. The present invention provides an adhesively double-faced PSA sheet that consists of a PSA layer and is free of a substrate. The PSA sheet has a refractive index of 1.50 or higher as well as a breaking strength of 10 MPa or less.
    Type: Application
    Filed: January 25, 2021
    Publication date: September 21, 2023
    Applicant: NITTO DENKO CORPORATION
    Inventors: Masataka NISHIWAKI, Kazuki MINOURA, Yasushi BUZOJIMA
  • Publication number: 20230212434
    Abstract: The present invention relates to a pressure-sensitive adhesive sheet including a pressure-sensitive adhesive layer containing a base polymer and a pigment, wherein the light transmittance in the wavelength range of 380 to 500 nm is 25% or less and the light transmittance in the wavelength range of 800 to 2,500 nm is 60% or more.
    Type: Application
    Filed: March 17, 2021
    Publication date: July 6, 2023
    Applicant: NITTO DENKO CORPORATION
    Inventors: Kazuki MINOURA, Masataka NISHIWAKI, Yasushi BUZOJIMA
  • Publication number: 20230132305
    Abstract: The present invention relates to a pressure-sensitive adhesive sheet including a pressure-sensitive adhesive layer containing a base polymer and a pigment, the pressure-sensitive adhesive sheet having a transmittance for light having wavelengths of 380-600 nm of 25% or less, transmittance for light having wavelengths 800-2,500 nm of 60% or greater, and a change in light transmittance in the wavelength range of 600 to 800 nm of 0.1%/nm or greater.
    Type: Application
    Filed: March 17, 2021
    Publication date: April 27, 2023
    Applicant: NITTO DENKO CORPORATION
    Inventors: Masataka NISHIWAKI, Kazuki MINOURA, Yasushi BUZOJIMA
  • Publication number: 20230132107
    Abstract: The present invention relates to a pressure-sensitive adhesive sheet including a pressure-sensitive adhesive layer containing a base polymer and a pigment, wherein the light transmittance in the wavelength range of 380 to 500 nm is 25% or less, the light transmittance in the wavelength range of 800 to 2,500 nm is 60% or more, L* defined by the L*a*b* color space is or less, a* is ?10 or more and 40 or less, and b* is ?20 or more and 30 or less.
    Type: Application
    Filed: March 17, 2021
    Publication date: April 27, 2023
    Applicant: NITTO DENKO CORPORATION
    Inventors: Kazuki MINOURA, Masataka NISHIWAKI, Yasushi BUZOJIMA
  • Publication number: 20230128453
    Abstract: To provide a PSA sheet having excellent IR-blocking properties. Provided is a PSA sheet having a substrate layer as well as a PSA layer placed on one face of the substrate layer. The PSA sheet has 5% or lower light transmittance in the thickness direction in a wavelength region of 780 nm to 2500 nm.
    Type: Application
    Filed: March 15, 2021
    Publication date: April 27, 2023
    Applicant: NITTO DENKO CORPORATION
    Inventors: Kazuki MINOURA, Masataka NISHIWAKI, Yasushi BUZOJIMA
  • Publication number: 20230121495
    Abstract: The PSA sheet provided by this invention has a PSA layer. The PSA layer comprises particles PHRI. The particles PHRI present in the PSA layer has a mean particle diameter of less than 100 nm and a standard deviation of 20 nm or less. Here, the mean particle diameter and the standard deviation are determined from a number-based particle distribution by TEM analysis.
    Type: Application
    Filed: January 25, 2021
    Publication date: April 20, 2023
    Applicant: NITTO DENKO CORPORATION
    Inventors: Masataka NISHIWAKI, Kazuki MINOURA, Yasushi BUZOJIMA
  • Publication number: 20230116628
    Abstract: To provide a PSA sheet having excellent IR-blocking properties. Provided is a PSA sheet having a PSA layer. The PSA sheet has 5% or lower light transmittance in the thickness direction in a wavelength region of 780 nm to 2500 nm. The PSA sheet has 0.01% or lower light transmittance in an in-plane direction in a wavelength region of 380 nm to 2500 nm.
    Type: Application
    Filed: March 15, 2021
    Publication date: April 13, 2023
    Applicant: NITTO DENKO CORPORATION
    Inventors: Kazuki MINOURA, Masataka NISHIWAKI, Yasushi BUZOUIMA
  • Publication number: 20230087412
    Abstract: Provided is a novel pressure-sensitive adhesive sheet that is capable of having good light-blocking properties while having an increased refractive index. The pressure-sensitive adhesive sheet provided by the present invention has a pressure-sensitive adhesive layer comprising a black colorant. The pressure-sensitive adhesive sheet has a refractive index of 1.50 or higher.
    Type: Application
    Filed: January 25, 2021
    Publication date: March 23, 2023
    Applicant: NITTO DENKO CORPORATION
    Inventors: Masataka NISHIWAKI, Kazuki MINOURA, Yasushi BUZOJIMA
  • Publication number: 20230077929
    Abstract: Provided is a PSA sheet having limited light transmission, increased refractive indices for IR light and VIS light with less wavelength dependence of refractive index and good adhesive properties. The PSA sheet provided by this invention has a PSA layer. The PSA sheet has a total light transmittance below 80%. The PSA layer has a first face and a second face on the opposite side to the first face. The PSA layer comprises high-refractive-index particles. The high-refractive-index particles are concentrated in the first face side of the PSA layer. On the first face, the difference between the refractive index nVIS at 500 nm wavelength and the refractive index nIR at 940 nm wavelength is less than 0.03.
    Type: Application
    Filed: February 1, 2021
    Publication date: March 16, 2023
    Applicant: NITTO DENKO CORPORATION
    Inventors: Masataka NISHIWAKI, Kazuki MINOURA, Yasushi BUZOJIMA
  • Publication number: 20230079556
    Abstract: Provided is a novel PSA sheet having limited light transmission and an increased refractive index. The PSA sheet provided by the present invention has a PSA layer. The PSA sheet has a total light transmittance of 80% or lower as well as a refractive index of 1.50 or higher.
    Type: Application
    Filed: January 25, 2021
    Publication date: March 16, 2023
    Applicant: NITTO DENKO CORPORATION
    Inventors: Masataka NISHIWAKI, Kazuki MINOURA, Yasushi BUZOJIMA
  • Publication number: 20230070327
    Abstract: Provided is a PSA sheet having limited light transmission, an increased refractive index and good adhesive properties. The PSA sheet provided by this invention has a PSA layer. The PSA sheet has a total light transmittance below 80%. The PSA layer has a first face and a second face on the opposite side to the first face. The PSA layer comprises high-refractive-index particles. In the PSA layer, the high-refractive-index particles are concentrated in a range that extends from the first face towards the second face side and has a thickness of at least 100 nm, accounting for less than 50% of the PSA layer thickness.
    Type: Application
    Filed: February 1, 2021
    Publication date: March 9, 2023
    Applicant: NITTO DENKO CORPORATION
    Inventors: Masataka NISHIWAKI, Kazuki MINOURA, Yasushi BUZOJIMA
  • Patent number: 11512232
    Abstract: The invention provides a PSA sheet having a PSA layer exhibiting superior light shielding. Provided is a PSA sheet comprising a PSA layer that includes a PSA polymer. Carbon black particles are dispersed in the PSA layer. The average particle size of the carbon black particles dispersed in the PSA layer is 300 nm or smaller. The average particle size is an average particle size determined on the basis of a number-based particle size distribution by TEM observation.
    Type: Grant
    Filed: October 18, 2019
    Date of Patent: November 29, 2022
    Assignee: NITTO DENKO CORPORATION
    Inventors: Ryo Morioka, Masataka Nishiwaki, Toshiki Ikami, Yasushi Buzojima
  • Publication number: 20210189190
    Abstract: A double-sided pressure-sensitive adhesive tape having excellent impact resistance, excellent reworkability, and excellent alcohol resistance. The double-sided pressure-sensitive adhesive tape includes: a base material layer; and pressure-sensitive adhesive layers arranged on both surface sides of the base material layer, wherein the pressure-sensitive adhesive layers are each formed from a pressure-sensitive adhesive composition, wherein the pressure-sensitive adhesive composition contains at least one kind selected from the group consisting of a monomer component (m) and a polymer component (P) obtained by polymerizing the monomer component (m), wherein the monomer component (m) contains 50 wt % or more of butyl (meth)acrylate, wherein a ratio of a thickness of the base material layer to a total thickness of the double-sided pressure-sensitive adhesive tape is less than 35%, and wherein the double-sided pressure-sensitive adhesive tape has a force, which is generated at 100% strain at 23° C.
    Type: Application
    Filed: October 14, 2020
    Publication date: June 24, 2021
    Applicant: NITTO DENKO CORPORATION
    Inventors: Takuya FUJITA, Hiromichi Sumida, Masahito Niwa, Masataka Nishiwaki, Yasushi Buzojima
  • Patent number: 10983377
    Abstract: Provided is a PSA sheet that can be processed with excellent precision while providing excellent light-blocking properties in an in-plane direction and in the thickness direction in an embodiment where the support substrate has a limited thickness. The PSA sheet has a support substrate having a thickness less than 75 ?m and a PSA layer placed at least on one face of the support substrate. The PSA sheet has light transmittances of 0.04% or lower in XY and Z directions thereof.
    Type: Grant
    Filed: September 20, 2019
    Date of Patent: April 20, 2021
    Assignee: NITTO DENKO CORPORATION
    Inventors: Masataka Nishiwaki, Kazuki Minoura, Kenta Jozuka, Naohiro Kato
  • Patent number: 10800944
    Abstract: Provided is a pressure-sensitive adhesive (PSA) sheet including a PSA layer formed from a PSA composition including a base polymer, crosslinking agents of two or more species having mutually different types of crosslinkable functional groups, and an azole-based rust inhibitor. Here, one of the crosslinking agents of two or more species is an isocyanate-based crosslinking agent. Monomeric components constituting the base polymer include a carboxy group-containing monomer. The amount of the azole-based rust inhibitor in the PSA layer is less than 8 parts by weight with respect to 100 parts by weight of the base polymer.
    Type: Grant
    Filed: August 8, 2017
    Date of Patent: October 13, 2020
    Assignee: NITTO DENKO CORPORATION
    Inventors: Hiroki Kigami, Yasushi Buzojima, Kenta Jozuka, Midori Segawa, Masataka Nishiwaki, Ryo Morioka
  • Publication number: 20200255701
    Abstract: Provided is a double-sided pressure-sensitive adhesive tape that can express both of excellent impact resistance and excellent oil resistance. The double-sided pressure-sensitive adhesive tape includes a pressure-sensitive adhesive layer laminate obtained by laminating “n” or more pressure-sensitive adhesive layers, wherein “n” represents an integer of 2 or more, wherein each of the pressure-sensitive adhesive layers is formed from a pressure-sensitive adhesive composition, wherein the pressure-sensitive adhesive composition contains at least one kind selected from the group consisting of a monomer component (m) and a polymer component (P) obtained by polymerizing the monomer component (m), and wherein the monomer component (m) contains 50 wt % or more of butyl acrylate.
    Type: Application
    Filed: January 30, 2020
    Publication date: August 13, 2020
    Applicant: NITTO DENKO CORPORATION
    Inventors: Naohiro KATO, Masahito Niwa, Yasushi Buzojima, Naoaki Higuchi, Masataka Nishiwaki