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：US11267998B2

公开(公告)日：2022-03-08

申请号：US16617221

申请日：2018-05-23

Applicant: NITTO DENKO CORPORATION

Inventor： Naoaki Higuchi ,  Shuuhei Yamamoto

IPC: C09J7/38 ,  C09J7/22 ,  B32B7/14 ,  B32B27/06 ,  C09J133/08 ,  C09J7/25

Abstract: Provided is a PSA sheet capable of suitably preventing bubble formation caused by outgassing. This invention provides a PSA sheet comprising a PSA layer that forms an adhesive face. In an aging test where the adhesive face is press-bonded to a glass plate and stored at 50° C. for 24 hours, the PSA sheet has at least 5% post-aging non-bonding area Sa, with Sa defined as the ratio of all areas non-bonding to the glass plate relative to the total area of the adhesive face. The non-bonding areas have parts linearly extending along the adhesive face.

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：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：US20200255701A1

公开(公告)日：2020-08-13

申请号：US16777217

申请日：2020-01-30

Applicant: NITTO DENKO CORPORATION

Inventor： Naohiro KATO ,  Masahito Niwa ,  Yasushi Buzojima ,  Naoaki Higuchi ,  Masataka Nishiwaki

IPC: C09J7/38 ,  C09J7/10

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.

公开(公告)号：US10550298B2

公开(公告)日：2020-02-04

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: C09J7/22 ,  C09J7/38 ,  C09J133/08 ,  C09J201/00 ,  C09J133/06 ,  C08L93/00

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.