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：US20200165489A1

公开(公告)日：2020-05-28

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 ,  C09J133/10 ,  C09J133/08 ,  C09J7/38

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：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：US20180194975A1

公开(公告)日：2018-07-12

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

CPC classification number: C09J7/385 ,  C09J7/22 ,  C09J7/25 ,  C09J7/255 ,  C09J133/14 ,  C09J2201/622 ,  C09J2203/326 ,  C09J2423/006 ,  C09J2433/00 ,  C09J2467/006 ,  C09J2475/006

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：US20210062049A1

公开(公告)日：2021-03-04

申请号：US16959313

申请日：2018-10-25

Applicant: NITTO DENKO CORPORATION

Inventor： Yusuke YAMANARI ,  Makoto SAITO ,  Naoaki HIGUCHI ,  Kenta JOZUKA

IPC: C09J7/38 ,  C09J7/25 ,  B32B7/023 ,  B32B7/06 ,  B32B7/12 ,  B32B27/40 ,  B32B27/10 ,  B32B27/08

Abstract: Provided is a pressure-sensitive adhesive tape that is hard to see through even in the case where a tensile stress is applied thereto. 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 laver, wherein the pressure-sensitive adhesive tape has a total light transmittance T1 of 20% or less under a state of being elongated by a degree of elongation of 0%, and wherein the pressure-sensitive adhesive tape has a total light transmittance T2 of 30% or less under a state of being elongated by a degree of elongation of 100%.

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.

公开(公告)号：US20190161651A1

公开(公告)日：2019-05-30

申请号：US16169077

申请日：2018-10-24

Applicant: NITTO DENKO CORPORATION

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

IPC: C09J7/38 ,  C09J133/06 ,  C09J7/40

Abstract: This invention provides a double-faced PSA sheet comprising a substrate film having first and second faces, and first and second PSA layers provided to the first and second faces of the substrate film, respectively. The first and second PSA layers have a combined thickness TPSA and the substrate film has a thickness TS at a TS/TPSA ratio value of 0.3 or less. The first and second PSA layers individually have a storage modulus G′(apply) of 0.6 MPa or less at a temperature at which the PSA sheet is press-bonded to an adherend.

公开(公告)号：US20190161650A1

公开(公告)日：2019-05-30

申请号：US16169035

申请日：2018-10-24

Applicant: NITTO DENKO CORPORATION

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

IPC: C09J7/38 ,  B32B7/12 ,  C09J7/20

Abstract: This invention provides a PSA sheet comprising a substrate layer, and a PSA layer provided to at least one face of the substrate layer. The substrate layer has a thickness TS and the PSA layer has a total thickness TPSA at a TS/TPSA ratio value of greater than 0.3, and the PSA layer has a storage modulus at 25° C., G′(25° C.) of 0.15 MPa or greater as well as a loss modulus at 25° C., G″(25° C.), of 2.0 MPa or less.