公开(公告)号：US20230079057A1

公开(公告)日：2023-03-16

申请号：US17882753

申请日：2022-08-08

Applicant: NITTO DENKO CORPORATION

Inventor： Shuhei YAMAMOTO ,  Amane SAWAMURA

IPC: C09J7/38 ,  C09J7/26

Abstract: A pressure-sensitive adhesive layer consists of a dried product of a water-dispersed pressure-sensitive adhesive composition. The water-dispersed pressure-sensitive adhesive composition contains a water-dispersible polymer, water, and polyacrylic acid. The polyacrylic acid content is above 0.1 parts by mass and 7 parts by mass or less with respect to 100 parts by mass of the water-dispersible polymer. A thickness of the pressure-sensitive adhesive layer is 10 μm or more and 40 μm or less.

公开(公告)号：US20230383146A1

公开(公告)日：2023-11-30

申请号：US18314201

申请日：2023-05-09

Applicant: NITTO DENKO CORPORATION

Inventor： Shuhei YAMAMOTO ,  Amane SAWAMURA

IPC: C09J7/38

CPC classification number: C09J7/385 ,  C09J2301/302 ,  C09J2301/124 ,  C09J2301/50

Abstract: A method of producing a double-sided pressure-sensitive adhesive sheet includes a step of applying a water-dispersed pressure-sensitive adhesive composition onto a release liner to form a coating film, a step of drying the coating film by heating to form a pressure-sensitive adhesive layer, a step of bonding a first surface of a substrate film to an exposed surface of the pressure-sensitive adhesive layer, a step of applying a water-dispersed pressure-sensitive adhesive composition onto a second surface of the substrate film to form a coating film, and a step of drying the coating film by heating to form a pressure-sensitive adhesive layer. A double-sided pressure-sensitive adhesive sheet includes the substrate film with a thickness of 12 μm or less, the first pressure-sensitive adhesive layer on the first surface formed from the water-dispersed pressure-sensitive adhesive composition, the second pressure-sensitive adhesive layer on the second surface formed from the water-dispersed pressure-sensitive adhesive composition, and the release liner in releasable contact with an adhesive surface of the pressure-sensitive adhesive layer.

公开(公告)号：US20230048315A1

公开(公告)日：2023-02-16

申请号：US17865857

申请日：2022-07-15

Applicant: NITTO DENKO CORPORATION

Inventor： Amane SAWAMURA ,  Shuhei YAMAMOTO ,  Keisuke SHIMOKITA ,  Hayata MATSUMOTO ,  Yasuhito INAI

IPC: C09J7/38 ,  C09J7/10 ,  C09J133/08 ,  C09J167/00

Abstract: A water-dispersed pressure-sensitive adhesive composition of the present invention includes a water-dispersible polymer, a carboxylic acid copolymer thickener, a polyacrylic acid thickener, and water. A ratio of the carboxylic acid copolymer thickener in the solid content of the water-dispersed pressure-sensitive adhesive composition is 0.1% by mass or more and 1.5% by mass or less. A ratio of the polyacrylic acid thickener in the solid content of the adhesive composition is 1% by mass or more and 3.7% by mass or less. A pressure-sensitive adhesive sheet of the present invention has a pressure-sensitive adhesive layer formed from the water-dispersed pressure-sensitive adhesive composition.

公开(公告)号：US20230047269A1

公开(公告)日：2023-02-16

申请号：US17865844

申请日：2022-07-15

Applicant: NITTO DENKO CORPORATION

Inventor： Hayata MATSUMOTO ,  Keisuke SHIMOKITA ,  Shuhei YAMAMOTO ,  Amane SAWAMURA

IPC: C09J133/08

Abstract: A water-dispersed pressure-sensitive adhesive composition includes a water-dispersible polymer and water. The viscosity X (Pa·s) and the dynamic surface tension Y (mN/m) at a life time of 100 milliseconds satisfy the following formulas (1) and (2): 0.15≤X≤1.25  (1) Y≤19.3X+35  (2)

公开(公告)号：US20240424830A1

公开(公告)日：2024-12-26

申请号：US18567878

申请日：2022-05-23

Applicant: NITTO DENKO CORPORATION

Inventor： Yuta MOMIKI ,  Hironao OTAKE ,  Hiroyuki WATANABE ,  Shuhei YAMAMOTO

IPC: B60B21/12 ,  C09J7/29 ,  C09J7/38

Abstract: Provided is a bicycle rim pressure-sensitive adhesive (PSA) tape having good workability. The bicycle rim PSA tape is a pressure sensitive adhesive sheet used for sealing a spoke hole in a bicycle rim; includes a support substrate, and a PSA layer on one surface of the support substrate; has a peel strength of 2 N/20 mm or more, as attached onto an aluminum plate as an adherend for 10 seconds and then measured under conditions at a tensile rate of 300 mm/min and a peel angle of 180°, under a temperature condition of 0° C.; and has a shear adhesive strength of 200 N/400 mm2 or more, as measured with employing an aluminum plate as an adherend under a temperature condition of 0° C.

公开(公告)号：US20230383145A1

公开(公告)日：2023-11-30

申请号：US18314191

申请日：2023-05-09

Applicant: NITTO DENKO CORPORATION

Inventor： Shuhei YAMAMOTO ,  Amane SAWAMURA

IPC: C09J7/38 ,  C09J7/40 ,  C09J7/29

CPC classification number: C09J7/385 ,  C09J7/401 ,  C09J7/29

Abstract: The double-sided pressure-sensitive adhesive sheet of the present invention includes a substrate film, a first pressure-sensitive adhesive layer, a second pressure-sensitive adhesive layer, and a release liner. The substrate film has a first surface and a second surface opposite the first surface. The first pressure-sensitive adhesive layer is disposed on the first surface, and has a first adhesive surface opposite the substrate film. The second pressure-sensitive adhesive layer is formed from a coating film of the pressure-sensitive adhesive composition applied on the second surface, and has a second adhesive surface opposite the substrate film. The release liner is in releasable contact with the first adhesive surface. The emission amount of toluene and ethyl acetate from the first pressure-sensitive adhesive layer on heating at 80° C. for 30 minutes is 10 μg/g or less.