公开(公告)号：US20230102451A1

公开(公告)日：2023-03-30

申请号：US17951362

申请日：2022-09-23

Applicant: Nitto Denko Corporation

Inventor： Masamichi MATSUMOTO ,  Hirofumi Katami ,  Sho Takarada ,  Ryohei Sawazaki ,  Kazuma Mitsui

IPC: C09J7/38 ,  C09J133/08 ,  G06F3/041 ,  C09J123/02

Abstract: An object of the present invention is to provide a pressure-sensitive adhesive sheet, an optical member, and a touch panel that enable a pressure-sensitive adhesive layer to be formed, the pressure-sensitive adhesive layer allowing the appearance of a display device and an input device to be unlikely to deteriorate even under low pressure conditions. The pressure-sensitive adhesive sheet has a pressure-sensitive adhesive layer, and the number of the voids having a diameter of 300 μM or more in the following low pressure test is less than 10, and the number of the voids having a diameter of not less than 50 less than 300 μM in the following low pressure test is less than 20.

公开(公告)号：US20220106501A1

公开(公告)日：2022-04-07

申请号：US17492843

申请日：2021-10-04

Applicant: NITTO DENKO CORPORATION

Inventor： Shinya Yamamoto ,  Sho Takarada ,  Takahiro Nonaka

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

Abstract: Pressure sensitive adhesive sheet has a shear storage elastic modulus of 3×104 Pa or more at 80° C. In the pressure sensitive adhesive sheet, an absolute value of a difference ΔG′ between a shear storage elastic modulus at 25° C. after a weather resistance test and a shear storage elastic modulus at 25° C. before the weather resistance test is 5×104 Pa or less, wherein the weather resistance test is conducted by applying light from a xenon lamp with an irradiation intensity of 0.63 W/cm2 at a wavelength of 340 nm for 500 hours. An increment in the amount of transmitted light b* before and after the weather resistance test is preferably 0.5 or less.

公开(公告)号：US20210357061A1

公开(公告)日：2021-11-18

申请号：US17285352

申请日：2020-10-02

Applicant: Nitto Denko Corporation

Inventor： Yasutaka Ishihara ,  Takanobu Yano ,  Sho Takarada

IPC: G06F3/041 ,  B32B27/08

Abstract: A flexible image display device includes a window member, a first member, a first laminate or a first touch-sensor-equipped panel member, and a plurality layers of tacky members. The first laminate is a laminate of a second member and a member 3A (including a panel member). When the first laminate is included, one of the first and second members is an optical film, and the other is an optical film or a touch sensor. The plurality layers of tacky members at least include three layers each disposed between the members. When the first touch-sensor-equipped panel member is included, the first member is an optical film, and the plurality layers of tacky members at least include two layers each disposed between the members. E0×T0≤0.32 (E0: elastic modulus (GPa) of the window member, T0: thickness (mm) of the window member).