公开(公告)号：US20230295468A1

公开(公告)日：2023-09-21

申请号：US17796110

申请日：2021-01-25

Applicant: NITTO DENKO CORPORATION

Inventor： Masataka NISHIWAKI ,  Kazuki MINOURA ,  Yasushi BUZOJIMA

IPC: C09J7/25 ,  C09J7/22 ,  C09J133/08 ,  C08K3/04

CPC classification number: C09J7/25 ,  C08K3/04 ,  C09J7/22 ,  C09J133/08 ,  C08K2201/003

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.

公开(公告)号：US20230070327A1

公开(公告)日：2023-03-09

申请号：US17797932

申请日：2021-02-01

Applicant: NITTO DENKO CORPORATION

Inventor： Masataka NISHIWAKI ,  Kazuki MINOURA ,  Yasushi BUZOJIMA

IPC: C09J7/38 ,  C09J133/08 ,  C09J11/04

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.

公开(公告)号：US20180044554A1

公开(公告)日：2018-02-15

申请号：US15671583

申请日：2017-08-08

Applicant: NITTO DENKO CORPORATION

Inventor： Hiroki KIGAMI ,  Yasushi BUZOJIMA ,  Kenta JOZUKA ,  Midori SEGAWA

IPC: C09J7/00 ,  C09J11/06 ,  C23F15/00 ,  C09J9/00 ,  B32B7/06 ,  B32B7/12

Abstract: Provided is a pressure-sensitive adhesive (PSA) sheet having a low relative dielectric constant, satisfactory metal corrosion preventing property, and excellent member holding performance. The present invention provides a PSA sheet having a PSA layer including a base polymer and a rust inhibitor. The base polymer is an acrylic polymer, and monomeric components constituting the acrylic polymer comprise a (meth)acrylate having an alkyl group having 5 or more carbon atoms at an ester end at 50% by weight or more of the monomeric components. The PSA layer has a relative dielectric constant of 3 or less at 300 kHz.

公开(公告)号：US20200048506A1

公开(公告)日：2020-02-13

申请号：US16503721

申请日：2019-07-05

Applicant: NITTO DENKO CORPORATION

Inventor： Naoaki HIGUCHI ,  Masataka NISHIWAKI ,  Yasushi BUZOJIMA

IPC: C09J7/38 ,  C09J7/29

Abstract: Provided is a pressure-sensitive adhesive tape capable of preventing an increase in internal pressure when used for, for example, forming a closed space. The pressure-sensitive adhesive tape is a pressure-sensitive adhesive tape, including, in this order: a first pressure-sensitive adhesive layer; an intermediate layer; and a second pressure-sensitive adhesive layer, the pressure-sensitive adhesive tape having at least one through-hole that penetrates through the pressure-sensitive adhesive tape in a plane direction thereof.

公开(公告)号：US20190106606A1

公开(公告)日：2019-04-11

申请号：US16152548

申请日：2018-10-05

Applicant: NITTO DENKO CORPORATION

Inventor： Kenta JOZUKA ,  Naoaki HIGUCHI ,  Naohiro KATO ,  Yasushi BUZOJIMA

IPC: C09J7/40 ,  C09J7/38

Abstract: This invention provides a double-linered PSA sheet having an adhesively double-faced PSA sheet, and first and second release films placed on first and second adhesive faces of the PSA sheet. The first and second release films have tensile elastic moduli E1 and E2 at an E2/E1 ratio value of 1.5 or greater.

公开(公告)号：US20190106605A1

公开(公告)日：2019-04-11

申请号：US16151946

申请日：2018-10-04

Applicant: NITTO DENKO CORPORATION

Inventor： Kenta JOZUKA ,  Naoaki HIGUCHI ,  Naohiro KATO ,  Yasushi BUZOJIMA

IPC: C09J7/38 ,  C09J11/08

Abstract: This invention provides a PSA sheet comprising a PSA layer. The PSA layer has a storage modulus at 25° C., G′(25° C.), of 0.15 MPa or greater and a storage modulus at 85° C., G′(85° C.), of 0.02 MPa or greater. The PSA sheet satisfies at least one of the following features: having a 180° peel strength of 8 N/20 mm or greater when determined within one minute after press-bonded at 23° C. at a press-bonding load of 0.1 kg or a 180° peel strength of 8 N/20 mm or greater when determined within one minute after press-bonded at 40° C. at 0.05 MPa for 3 seconds.

公开(公告)号：US20230132107A1

公开(公告)日：2023-04-27

申请号：US17912739

申请日：2021-03-17

Applicant: NITTO DENKO CORPORATION

Inventor： Kazuki MINOURA ,  Masataka NISHIWAKI ,  Yasushi BUZOJIMA

IPC: C09J7/38 ,  C09J7/10 ,  C09J11/04 ,  C09J133/08

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.

公开(公告)号：US20230087412A1

公开(公告)日：2023-03-23

申请号：US17796090

申请日：2021-01-25

Applicant: NITTO DENKO CORPORATION

Inventor： Masataka NISHIWAKI ,  Kazuki MINOURA ,  Yasushi BUZOJIMA

IPC: C09J7/38 ,  C09J7/10 ,  C09J7/25

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.

公开(公告)号：US20180044555A1

公开(公告)日：2018-02-15

申请号：US15671633

申请日：2017-08-08

Applicant: NITTO DENKO CORPORATION

Inventor： Hiroki KIGAMI ,  Yasushi BUZOJIMA ,  Kenta JOZUKA ,  Midori SEGAWA ,  Masataka NISHIWAKI ,  Ryo MORIOKA

IPC: C09J7/00 ,  C09J11/06 ,  C23F15/00 ,  C09J9/00 ,  B32B7/06 ,  B32B7/12

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.

公开(公告)号：US20170158918A1

公开(公告)日：2017-06-08

申请号：US15327408

申请日：2015-07-14

Applicant: NITTO DENKO CORPORATION

Inventor： Kenta JOZUKA ,  Naoki NAKAYAMA ,  Yoshikazu SOEDA ,  Yasushi BUZOJIMA ,  Naoaki HIGUCHI

IPC: C09J7/02 ,  C09J133/08

Abstract: 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.