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：US20160084991A1

公开(公告)日：2016-03-24

申请号：US14891492

申请日：2015-01-16

Applicant: NITTO DENKO CORPORATION

Inventor： Toru UMEMOTO ,  Hirofumi KATAMI ,  Hiroyuki TAKAO ,  Takahiro NONAKA ,  Atsushi YASUI ,  Takami HIKITA

IPC: G02B1/111 ,  B32B7/02 ,  B32B37/12 ,  B32B7/12

Abstract: A laminate of optical elements comprises a transparent first optical element, a second optical element, and a transparent pressure-sensitive adhesive layer for bonding the first optical element to the second optical element. The pressure-sensitive adhesive layer comprises a base adhesive zone, a transparent refractive index-adjusting zone. The base adhesive zone is made essentially of a transparent base pressure-sensitive adhesive material and formed over a given range from a first principal surface of the pressure-sensitive adhesive layer facing the first optical element, in a thickness direction of the pressure-sensitive adhesive layer. The a transparent, adherent, refractive index-adjusting zone is formed over a given range from a second principal surface of the pressure-sensitive adhesive layer facing the second optical element.

Abstract translation: 光学元件的层叠体包括透明第一光学元件，第二光学元件和用于将第一光学元件接合到第二光学元件的透明压敏粘合剂层。 压敏粘合剂层包括基底粘合区域，透明折射率调节区域。 基底粘合剂区域基本上由透明基底压敏粘合剂材料制成，并且在压敏粘合剂层的面向第一光学元件的第一主表面的给定范围内，在压敏粘合剂的厚度方向上形成 层。 透明粘附的折射率调节区形成在与第二光学元件相对的压敏粘合剂层的第二主表面的给定范围内。

公开(公告)号：US20230220247A1

公开(公告)日：2023-07-13

申请号：US18009136

申请日：2021-06-09

Applicant: NITTO DENKO CORPORATION

Inventor： Hirofumi KATAMI ,  Masamichi MATSUMOTO ,  Takahiro NONAKA

IPC: C09J7/38 ,  C09J11/06 ,  C09J7/28 ,  B32B15/02 ,  G06F3/041 ,  G06F3/044

CPC classification number: C09J7/385 ,  C09J11/06 ,  C09J7/28 ,  B32B15/02 ,  G06F3/0412 ,  G06F3/044 ,  B32B15/085

Abstract: An object of the present invention is to provide a pressure-sensitive adhesive sheet enables a pressure-sensitive adhesive layer to be formed, wherein the pressure-sensitive adhesive layer has a low dielectric constant, is excellent in level difference conformability while maintaining adhesive strength and adhesion reliability at high temperatures, and suitable for laminating a metal mesh film and the like. The pressure-sensitive adhesive sheet of the present invention is a pressure-sensitive adhesive sheet having a pressure-sensitive adhesive layer, the pressure-sensitive adhesive layer containing an acrylic polymer (A) and a hydrogenated polyolefinic resin (B) that exhibits liquid flowability at 25° C. The pressure-sensitive adhesive layer has a dielectric constant at a frequency of 1 MHz of from 2.3 to 3.5. The pressure-sensitive adhesive sheet has a 180° peel adhesive strength to a glass plate at a tensile speed of 300 mm/minute at 65° C. of 6 N/20 mm or more. In the pressure-sensitive adhesive sheet, the proportion of the 180° peel adhesive strength to a glass plate at a tensile speed of 300 mm/minute at 65° C. to the 180° peel adhesive strength to a glass plate at a tensile speed of 300 mm/minute at 25° C. (180° peel adhesive strength to a glass plate at a tensile speed of 300 mm/minute at 65° C./180° peel adhesive strength to a glass plate at a tensile speed of 300 mm/minute at 25° C.×100) is 30 or more.

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：US20130203941A1

公开(公告)日：2013-08-08

申请号：US13759160

申请日：2013-02-05

Applicant: NITTO DENKO CORPORATION

Inventor： Hirofumi KATAMI ,  Takahiro NONAKA

IPC: C09J133/14

CPC classification number: C09J133/14 ,  C08L33/08 ,  C09J133/066

Abstract: An acrylic pressure-sensitive adhesive tape including an acrylic pressure-sensitive adhesive layer, wherein a 180° peel adhesive force of the acrylic pressure-sensitive adhesive tape to a glass plate is 10 N/20 mm or more and a 180° peel adhesive force of the acrylic pressure-sensitive adhesive tape to an acrylic plate is 10 N/20 mm or more. The acrylic pressure-sensitive adhesive layer contains an acrylic polymer (A), has a gel fraction of 65% or more, and has a 300% tensile residual stress of from 7 to 16 N/cm2.

Abstract translation: 丙烯酸类压敏粘合带，其包含丙烯酸类压敏粘合剂层，其中丙烯酸类压敏粘合带与玻璃板的180°剥离粘合力为10N / 20mm以上180°剥离粘合力 的丙烯酸类压敏粘合带为丙烯酸板为10N / 20mm以上。 丙烯酸类压敏粘合剂层含有丙烯酸类聚合物（A），凝胶分数为65％以上，拉伸残余应力为300％，为7〜16N / cm 2。

公开(公告)号：US20180134922A1

公开(公告)日：2018-05-17

申请号：US15569202

申请日：2016-07-20

Applicant: NITTO DENKO CORPORATION

Inventor： Hirofumi KATAMI ,  Atsushi YASUI

IPC: C09J7/38 ,  H01L51/52 ,  G02B5/30 ,  B32B7/12 ,  B32B7/02

CPC classification number: C09J7/381 ,  B32B7/02 ,  B32B7/12 ,  C08K3/22 ,  C09J7/38 ,  C09J11/04 ,  C09J11/08 ,  C09J201/00 ,  C09J2203/318 ,  C09J2205/102 ,  C09J2433/00 ,  G02B5/3033 ,  G02B5/3083 ,  G02F1/133502 ,  G02F2202/28 ,  H01L51/5246 ,  H01L51/5253 ,  H01L51/5281

Abstract: Provided is a polarizing film laminate comprising: an element substrate; a polarizer; a transparent electroconductive layer patterned so as to function as a touch sensor; and a pressure-sensitive adhesive layer, wherein the adhesive layer comprises: a base adhesive zone made of a transparent base pressure-sensitive adhesive material and formed over a given range from the adhesive layer in a thickness direction of the adhesive layer; and a refractive index adjustment zone formed over a given range from the adhesive layer in the thickness direction and comprising the base adhesive material and material infiltrated into the base adhesive material and different from the base adhesive material, the refractive index adjustment zone having an average refractive index greater than a refractive index of the base adhesive material, and wherein the base adhesive material zone of the adhesive layer is located on the side of the element substrate.

公开(公告)号：US20180051191A1

公开(公告)日：2018-02-22

申请号：US15552706

申请日：2016-07-11

Applicant: NITTO DENKO CORPORATION

Inventor： Hirofumi KATAMI ,  Atsushi YASUI

IPC: C09J7/02 ,  B32B7/12 ,  B32B7/02 ,  C08K3/22 ,  C03C27/10 ,  G06F3/041

CPC classification number: B32B7/12 ,  B32B7/02 ,  B32B27/00 ,  B32B2307/418 ,  C03C27/10 ,  C08K3/22 ,  C08K2201/002 ,  C09J7/10 ,  C09J201/00 ,  C09J2201/134 ,  C09J2201/606 ,  C09J2203/318 ,  C09J2205/102 ,  G02F2202/28 ,  G06F3/041

Abstract: The present invention provides a cover element having a pressure-sensitive adhesive sheet preliminarily laminated thereto, wherein the pressure-sensitive adhesive sheet comprises a pressure-sensitive adhesive layer in which a refractive index adjustment zone having a refractive index greater than that of a base pressure-sensitive adhesive material thereof is formed over a given range from a surface of the pressure-sensitive adhesive layer in a thickness direction thereof, whereby: in a lamination process of a customer which is a supply destination of the cover element, it becomes possible to eliminate a need to distinguish between obverse and reverse sides of the pressure-sensitive adhesive sheet itself; and, when the cover element is bonded to an optical element through the pressure-sensitive adhesive layer, it becomes possible to suppress internal reflection in a laminate formed of these optical elements.

公开(公告)号：US20140322440A1

公开(公告)日：2014-10-30

申请号：US14263282

申请日：2014-04-28

Applicant: NITTO DENKO CORPORATION

Inventor： Takahiro NONAKA ,  Hiroaki KISHIOKA ,  Hirofumi KATAMI

IPC: G02B1/10

CPC classification number: G02B1/10

Abstract: A method for manufacturing an optical member includes forming a printed layer on one surface of a sheet substrate or flat-plate substrate. The method further includes coating one or more pressure-sensitive adhesives selected from the group consisting of a hot melt pressure-sensitive adhesive and an active energy-ray curable pressure-sensitive adhesive on a surface on a printed layer side of the sheet substrate or flat-plate substrate, and forming a pressure-sensitive adhesive layer of the pressure-sensitive adhesive.

Abstract translation: 一种光学构件的制造方法包括在片状基板或平板基板的一个表面上形成印刷层。 该方法还包括将一种或多种选自热熔压敏粘合剂和活性能量射线固化型压敏粘合剂的压敏粘合剂涂布在片状基材的印刷层侧的表面上或平坦 并且形成压敏粘合剂的压敏粘合剂层。

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：US20230099594A1

公开(公告)日：2023-03-30

申请号：US17951378

申请日：2022-09-23

Applicant: NITTO DENKO CORPORATION

Inventor： Masamichi MATSUMOTO ,  Hirofumi KATAMI ,  Sho TAKARADA ,  Ryohei SAWAZAKI ,  Kazuma MITSUI

IPC: C09J133/08 ,  C09J7/28 ,  C09J7/38 ,  B32B7/12

Abstract: An object of the present invention is to provide a pressure-sensitive adhesive composition that enables 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, a pressure-sensitive adhesive layer, a pressure-sensitive adhesive sheet, an optical member, and a touch panel. The pressure-sensitive adhesive composition of the present invention contains an acrylic polymer (A) and a hydrogenated polyolefinic resin (B). The acrylic polymer (A) contains a (meth)acrylic alkyl ester having an alkyl group having 8 or more carbon atoms as a constituent monomer component. The hydrogenated polyolefinic resin (B) contains a hydrogenated polyolefin.