公开(公告)号：US20220119685A1

公开(公告)日：2022-04-21

申请号：US17428368

申请日：2020-01-30

Applicant: NITTO DENKO CORPORATION

Inventor： Takatoshi KAWAMOTO ,  Junji FUKUHARA ,  Takamasa HIRAYAMA

IPC: C09J7/38 ,  C08F220/18 ,  C08F220/20 ,  C08F220/36

Abstract: Provided is a PSA sheet that can be separated well from the adherend after a curing treatment and that can prevent adhesive transfer during separation even when exposed to a high temperature. Provided is a PSA sheet having a PSA layer. The PSA layer of the PSA sheet comprises a polymer having a glass transition temperature of −63° C. or higher. The PSA sheet has an adhesive strength reduction rate 17% or higher after a heating/curing treatment.

公开(公告)号：US20220195256A1

公开(公告)日：2022-06-23

申请号：US17428380

申请日：2020-01-30

Applicant: NITTO DENKO CORPORATION

Inventor： Takatoshi KAWAMOTO ,  Junji FUKUHARA ,  Takamasa HIRAYAMA

IPC: C09J7/38 ,  C08F220/18 ,  C08F220/20 ,  C08F220/36 ,  C09J133/08

Abstract: Provided is a PSA sheet that can bond well with at least a prescribed bonding strength to an adherend before a curing treatment and that can greatly prevent adhesive transfer during separation from the adherend after the curing treatment even when exposed to a high temperature. Provided is a PSA sheet having a PSA layer comprising carbon-carbon double bonds. The PSA sheet satisfies a property that the PSA layer has an elastic modulus of 22 MPa or greater, determined by nanoindentation after a heating/curing treatment in which the PSA sheet is heated at 180° C. for one hour, left standing at 25° C. for 30 minutes and then irradiated with UV rays at an intensity of 60 mW/cm2.

公开(公告)号：US20170226384A1

公开(公告)日：2017-08-10

申请号：US15501486

申请日：2016-02-23

Applicant: NITTO DENKO CORPORATION

Inventor： Takatoshi KAWAMOTO ,  Izumi SHIMIZU ,  Ikkou HANAKI ,  Kiichiro MATSUSHITA

IPC: C09J7/02

CPC classification number: C09J7/22 ,  C09J7/38 ,  C09J133/066 ,  C09J2201/134 ,  C09J2201/606 ,  C09J2201/622 ,  C09J2423/046 ,  C09J2433/00

Abstract: A double-sided pressure-sensitive adhesive tape includes a support base member having a hand tearable property, a first acrylic adhesive layer on one surface of the support base member, and a second acrylic adhesive layer on another surface of the support base member. The first acrylic adhesive layer has a thickness t1 that is 5 μm or more and 50 μm or less, the second acrylic adhesive layer has a thickness t2 that is greater than the thickness t1 of the first acrylic adhesive layer and is 20 μm or more, the second acrylic adhesive layer has gel fraction X2 that is 20 mass % or more and 75 mass % or less, and the second acrylic adhesive layer has adhesive force greater than adhesive force of the first acrylic adhesive layer.