公开(公告)号：US11186750B2

公开(公告)日：2021-11-30

申请号：US16633837

申请日：2018-07-24

Applicant: NITTO DENKO CORPORATION

Inventor： Yusuke Yamanari ,  Makoto Saito ,  Naoaki Higuchi ,  Kenta Jozuka

IPC: C09J7/22 ,  C09J131/04 ,  C09J7/38 ,  C09J133/08 ,  C09J133/10

Abstract: Provided is a pressure-sensitive adhesive tape excellent in unevenness followability. The pressure-sensitive adhesive tape of the present invention includes: a base material layer; and a pressure-sensitive adhesive layer arranged on at least one side of the base material layer, wherein the pressure-sensitive adhesive tape has a dimensional change ratio at 23° C. of from 0.20 to 0.39.

公开(公告)号：US20200096810A1

公开(公告)日：2020-03-26

申请号：US16576898

申请日：2019-09-20

Applicant: Nitto Denko Corporation

Inventor： Masataka Nishiwaki ,  Kazuki Minoura ,  Kenta Jozuka ,  Naohiro Kato

IPC: G02F1/1333 ,  G02F1/1335 ,  C09J7/38

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 μm 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.

公开(公告)号：US09624404B2

公开(公告)日：2017-04-18

申请号：US14806188

申请日：2015-07-22

Applicant: NITTO DENKO CORPORATION

Inventor： Kenta Jozuka ,  Naoki Nakayama ,  Yoshimasa Nishida ,  Yoshikazu Soeda

IPC: C09J7/00 ,  C09J7/02 ,  H01M2/10

CPC classification number: C09J7/0217 ,  C09J7/22 ,  C09J7/30 ,  C09J2201/128 ,  C09J2201/618 ,  C09J2203/318 ,  H01M2/1016

Abstract: 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.

公开(公告)号：US10800944B2

公开(公告)日：2020-10-13

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: C09J7/38 ,  C09J7/10 ,  C09J11/06 ,  C08K5/3475 ,  C09J133/08 ,  C09J7/00 ,  B32B7/06 ,  B32B7/12 ,  C09J9/00 ,  C23F15/00 ,  C09J133/06

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：US20200148919A1

公开(公告)日：2020-05-14

申请号：US16682005

申请日：2019-11-13

Applicant: Nitto Denko Corporation

Inventor： Toshiki Ikami ,  Yasushi Buzojima ,  Kenta Jozuka ,  Naoaki Higuchi ,  Midori Segawa ,  Naohiro Kato

IPC: C09J7/38 ,  C09J133/08 ,  B32B27/06

Abstract: Provided is a PSA sheet capable of providing reliable adhesion even upon exposure to cosmetics, chemicals and the like containing polar compounds. The PSA sheet provided by this invention has a PSA layer comprising a polyester-based polymer. The PSA sheet has a 180° peel strength of 1 N/5 mm or greater after ethanol immersion.

公开(公告)号：US10983377B2

公开(公告)日：2021-04-20

申请号：US16576898

申请日：2019-09-20

Applicant: NITTO DENKO CORPORATION

Inventor： Masataka Nishiwaki ,  Kazuki Minoura ,  Kenta Jozuka ,  Naohiro Kato

IPC: G02F1/1333 ,  C09J7/38 ,  G02F1/1335

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 μm 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.

公开(公告)号：US20200017726A1

公开(公告)日：2020-01-16

申请号：US16505814

申请日：2019-07-09

Applicant: NITTO DENKO CORPORATION

Inventor： Toshiki Ikami ,  Naoaki Higuchi ,  Kenta Jozuka

IPC: C09J7/38 ,  C09J11/08 ,  C09J7/26 ,  B32B7/12 ,  G06F3/041

Abstract: Provided is a PSA sheet that provides reliable adhesion even upon contact with grease. Provided is an adhesively double-faced PSA sheet having a PSA layer. The PSA sheet has an initial push-peel strength of 0.5 MPa or greater. It has an adhesive strength retention rate of 25% or higher, determined as the ratio of the push-peel strength at 24 hours after artificial sebum application to the push-peel strength before the artificial sebum application.

公开(公告)号：US11236253B2

公开(公告)日：2022-02-01

申请号：US15862989

申请日：2018-01-05

Applicant: NITTO DENKO CORPORATION

Inventor： Yusuke Yamanari ,  Makoto Saito ,  Naoaki Higuchi ,  Kenta Jozuka

IPC: C09J7/38 ,  C09J7/25 ,  C09J133/14 ,  C09J133/06 ,  C09J7/20 ,  C09J133/00 ,  C08L93/04 ,  C09J7/22

Abstract: Provided is a PSA sheet highly durable against repeated deformation and suited for use in a flexible device as well. The PSA sheet provided by this invention comprises a PSA layer. The PSA sheet shows a recovery rate at 100% elongation of 70% or higher. The PSA layer shows a displacement of 0.5 mm or greater according to the following holding power test:

At 23° C., the PSA layer is applied over a 10 mm wide by 20 mm long bonding area to a Bakelite plate as an adherend; a 1 kg load is applied in the length direction; after one hour, the displacement from the initial position where first applied is determined.

公开(公告)号：US11168236B2

公开(公告)日：2021-11-09

申请号：US16152776

申请日：2018-10-05

Applicant: NITTO DENKO CORPORATION

Inventor： Kenta Jozuka ,  Naoaki Higuchi ,  Kenji Furuta ,  Naohiro Kato ,  Yasushi Buzojima

IPC: C09J133/08 ,  C09J7/38 ,  C08F220/18 ,  C09J133/10 ,  C09J133/12 ,  C09J11/08 ,  C09J133/00

Abstract: The present invention provides an acrylic PSA composition. The acrylic PSA composition comprises an acrylic polymer as its base polymer and at least one species selected among tackifier resins and (meth)acrylic oligomers. The acrylic polymer has a weight average molecular weight higher than 70×104. The acrylic polymer has a dispersity (Mw/Mn) below 15.

公开(公告)号：US10800943B2

公开(公告)日：2020-10-13

申请号：US15671583

申请日：2017-08-08

Applicant: NITTO DENKO CORPORATION

Inventor： Hiroki Kigami ,  Yasushi Buzojima ,  Kenta Jozuka ,  Midori Segawa

IPC: C09J7/10 ,  C09J7/38 ,  C09J9/00 ,  C09J11/06 ,  C23F15/00 ,  C08K5/3475 ,  C09J133/08 ,  C09J7/00 ,  B32B7/06 ,  B32B7/12 ,  C09J133/06

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.