公开(公告)号：US20230072725A1

公开(公告)日：2023-03-09

申请号：US17800137

申请日：2021-02-04

Applicant: NITTO DENKO CORPORATION

Inventor： Shinya YAMAMOTO ,  Tomohiro YAMASHITA ,  Sho TAKARADA ,  Takahiro NONAKA ,  Katsunori TAKADA ,  Yusuke TOYAMA

IPC: G02B5/30 ,  G02B7/00 ,  G02B1/14

Abstract: A polarizing film having a pressure-sensitive adhesive layer, said polarizing film comprising a polarizer film and a first transparent protective film, wherein a first pressure-sensitive adhesive layer is provided on the first transparent protective film side of the polarizing film. The polarizer film has a film thickness of 20 μm or less; the first pressure-sensitive adhesive layer is used for the bonding of a front transparent member that is arranged at the viewing side of an image display device, while having a difference between the saturation moisture percentage (A) at 80° C. at 85% R.H. and the saturation moisture percentage (B) at 25° C. at 50% R.H., namely ((A)−(B)) of 1.0% by weight or more. This polarizing film having a pressure-sensitive adhesive layer is able to suppress decrease in the single transmittance of the polarizing film in a high temperature environment.

公开(公告)号：US20160209566A1

公开(公告)日：2016-07-21

申请号：US15000322

申请日：2016-01-19

Applicant: NITTO DENKO CORPORATION

Inventor： Atsushi YASUI ,  Shou TAKARADA ,  Masaki MIZUTANI ,  Hirofumi KATAMI ,  Shinya YAMAMOTO

IPC: G02B5/30 ,  G02F1/1335

CPC classification number: G02B5/3033 ,  G02F1/133528 ,  G02F2202/28

Abstract: A double-sided pressure-sensitive-adhesive-layer-attached polarizing film which is good in yield ratio, and satisfies step-absorbing capability provided that the film is a double-sided pressure-sensitive-adhesive-layer-attached polarizing film having a pressure-sensitive adhesive layer on each of the two surfaces of a polarizing film which is provided nearest to a viewer-side of an image display device among at least one polarizing film used in the device, and having the structure and properties as described.

Abstract translation: 具有良好的屈服比，并且满足阶段吸收能力的双面压敏粘合剂层附着偏光膜，只要该膜是双面粘合剂粘合剂层的偏振膜，其具有 在装置中使用的至少一个偏振膜中，最靠近图像显示装置的观察者侧的偏振膜的两个表面的每个表面上具有压敏粘合剂层，并且具有如上所述的结构和性质。

公开(公告)号：US20160237319A1

公开(公告)日：2016-08-18

申请号：US15042690

申请日：2016-02-12

Applicant: NITTO DENKO CORPORATION

Inventor： Shou TAKARADA ,  Masaki MIZUTANI ,  Atsushi YASUI ,  Shinya YAMAMOTO

IPC: C09J7/02 ,  B32B27/26 ,  B32B27/30 ,  G02B5/30 ,  B32B27/08

CPC classification number: B32B27/08 ,  B32B7/02 ,  B32B7/06 ,  B32B7/12 ,  B32B27/308 ,  B32B27/32 ,  B32B27/36 ,  B32B2250/24 ,  B32B2255/10 ,  B32B2255/26 ,  B32B2270/00 ,  B32B2307/4026 ,  B32B2307/42 ,  B32B2307/51 ,  B32B2307/514 ,  B32B2307/7145 ,  B32B2307/732 ,  B32B2307/748 ,  B32B2457/00 ,  B32B2457/208 ,  B32B2551/00 ,  C09D123/06 ,  C09J7/385 ,  C09J133/08 ,  C09J2201/36 ,  C09J2203/318 ,  G02B5/3025

Abstract: The optical film with pressure sensitive adhesive comprises an optical film and a front-side pressure sensitive adhesive sheet. The front-side pressure sensitive adhesive sheet is a laminated pressure sensitive adhesive sheet and includes a first pressure sensitive adhesive layer disposed in contact with the optical film, and a second pressure sensitive adhesive layer disposed at the furthest from the optical film. The first pressure sensitive adhesive layer has a storage elastic modulus of 9×103 Pa or less at 150° C., and a ratio G′20/G′150 of 20 or more, where G′20 is a storage elastic modulus at 20° C. and G′150 is a storage elastic modulus at 150° C. The second pressure sensitive adhesive layer has a storage elastic modulus of 4×105 Pa or less at 20° C., and a storage elastic modulus of 1×104 Pa or more at 150° C.

Abstract translation: 具有压敏粘合剂的光学膜包括光学膜和前侧压敏粘合片。 前侧压敏粘合片是层叠压敏粘合片，并且包括与光学膜接触设置的第一压敏粘合剂层和设置在距离光学膜最远的第二压敏粘合剂层。 第一压敏粘合剂层在150℃下的储能弹性模量为9×10 3 Pa以下，G'20 / G'150为20以上，G'20为20时的储能弹性模量 ℃，G'150是150℃下的储能弹性模量。第二压敏粘合剂层在20℃下的储能弹性模量为4×10 5 Pa以下，储存弹性模量为1×10 4 Pa以上150℃

公开(公告)号：US20240182756A1

公开(公告)日：2024-06-06

申请号：US18284135

申请日：2022-03-24

Applicant: NITTO DENKO CORPORATION

Inventor： Shuhei FUKUTOMI ,  Hirofumi KATAMI ,  Shinya YAMAMOTO

IPC: C09J7/38 ,  C09J11/06 ,  C09J133/14

CPC classification number: C09J7/385 ,  C09J11/06 ,  C09J133/14

Abstract: An object of the present invention is to provide a radiation curable pressure-sensitive adhesive sheet with excellent storage stability, which can suppress the progress of curing during storage and maintain excellent level difference absorbability and stress relaxation properties for a long time. A radiation curable pressure-sensitive adhesive sheet 1 of the present invention has a pressure-sensitive adhesive layer 10 that is cured by irradiation with radiation. The pressure-sensitive adhesive layer 10 contains a photopolymerization initiator 11a and a crosslinking agent 11b, and the curing by irradiation with radiation is curing by a reaction between the photopolymerization initiator 11a and the crosslinking agent 11b. In the radiation curable pressure-sensitive adhesive sheet 1 of the present invention, when the pressure-sensitive adhesive layer 10 is stored at 50° C. for 4 weeks, a rate of change in residual stress (N/cm2) expressed by the following equation is 70% or less.


Residual stress change rate (%)=(residual stress after storage at 50° C. for 4 weeks−initial residual stress)/(initial residual stress)×100

公开(公告)号：US20160002505A1

公开(公告)日：2016-01-07

申请号：US14771524

申请日：2014-03-12

Applicant: NITTO DENKO CORPORATION

Inventor： Masaki MIZUTANI ,  Yuki HASEGAWA ,  Yusuke MOTEGI ,  Shou TAKARADA ,  Shinya YAMAMOTO ,  Takami HIKITA

IPC: C09J133/14 ,  G06F3/041 ,  C09J165/00

CPC classification number: C09J133/14 ,  C08F220/18 ,  C09J7/385 ,  C09J133/08 ,  C09J165/00 ,  C09J2203/318 ,  G06F3/0414 ,  C08F2220/1858 ,  C08F226/08 ,  C08F220/14 ,  C08F220/20

Abstract: The pressure sensitive adhesive of the present invention includes an acryl-based base polymer and a hydrogenated terpene phenolic resin having a softening point of 70° C. to 150° C. The hydrogenated terpene phenolic resin preferably has a terpene molar ratio of 0.1 to 0.7. The content of acryl-based base polymer is preferably 45 to 95 parts by weight based on total 100 parts by weight of the pressure sensitive adhesive composition. In addition, total content of the acryl-based base polymer and the hydrogenated terpene phenolic resin is preferably 70 parts by weight or more. The pressure sensitive adhesive of the present invention is hardly clouded even under a high-temperature and high-humidity environment, and has level difference followability, thus can be used by disposing between a front transparent plate and a touch panel, between a front transparent plate and an image display panel or between a touch panel and an image display panel.

Abstract translation: 本发明的压敏粘合剂包括丙烯酸类基础聚合物和软化点为70℃至150℃的氢化萜烯酚醛树脂。氢化萜烯酚醛树脂优选具有0.1至0.7的萜烯摩尔比 。 丙烯酸系基础聚合物的含量相对于100重量份的压敏粘合剂组合物优选为45〜95重量份。 此外，丙烯酸系基础聚合物和氢化萜烯酚醛树脂的总含量优选为70重量份以上。 即使在高温高湿环境下，本发明的压敏粘合剂几乎不会变得混浊，并且具有水平差的追随性，因此可以通过在前透明板和触摸面板之间设置在前透明板 以及图像显示面板或触摸面板与图像显示面板之间。

公开(公告)号：US20230203347A1

公开(公告)日：2023-06-29

申请号：US17914591

申请日：2021-03-24

Applicant: NITTO DENKO CORPORATION

Inventor： Hirofumi KATAMI ,  Hirotaka OHARA ,  Shuhei FUKUTOMI ,  Shinya YAMAMOTO ,  Takahiro NONAKA

IPC: C09J7/38 ,  C09J7/20 ,  C09J11/02 ,  B32B7/12 ,  B32B27/18

CPC classification number: C09J7/38 ,  C09J7/20 ,  C09J11/02 ,  B32B7/12 ,  B32B27/18 ,  C09J2301/50 ,  B32B2307/412 ,  B32B2307/748

Abstract: A method for producing a pressure-sensitive adhesive sheet according to the present invention includes: forming a pressure-sensitive adhesive layer 10 formed of a transparent base pressure-sensitive adhesive material on a support S; curing the pressure-sensitive adhesive layer 10; providing a solution 12 of an additive 11; applying the solution 12 to one of opposite surfaces of the cured pressure-sensitive adhesive layer 10a to cause the additive contained in the solution 12 to infiltrate from the one surface in a thickness direction of the pressure-sensitive adhesive layer 10a; and drying the pressure-sensitive adhesive layer 10a.

公开(公告)号：US20220282129A1

公开(公告)日：2022-09-08

申请号：US17688233

申请日：2022-03-07

Applicant: NITTO DENKO CORPORATION

Inventor： Shinya YAMAMOTO ,  Sho TAKARADA ,  Naofumi KOSAKA ,  Takahiro NONAKA

IPC: C09J7/38

Abstract: Provided is an optical pressure-sensitive adhesive composition that gives a pressure-sensitive adhesive layer having such heating reworkability as to be easily removed from a component such as cover glass at a temperature higher than the service temperature of an image display device. The optical pressure-sensitive adhesive composition of the present invention gives a release force X of 4.0 N/20 mm or less, where the release force X is a release force determined by applying a film to a glass plate through a pressure-sensitive adhesive layer made from the optical pressure-sensitive adhesive composition, and puling the film at a temperature of 100° C., a peel angle of 180 degrees, and a tensile speed of 50 mm/min.