公开(公告)号：US20210260851A1

公开(公告)日：2021-08-26

申请号：US17252387

申请日：2019-05-20

Applicant: NITTO DENKO CORPORATION

Inventor： Hiroshi Tomohisa ,  Hirofumi Katami ,  Hironori Yaginuma

IPC: B32B7/023 ,  H01L27/32 ,  G02B5/30 ,  B32B27/30 ,  B32B37/12 ,  C09J7/38 ,  C09J11/06 ,  G02B5/22 ,  C08K5/00

Abstract: There is provided an optical laminate that can suppress the deterioration of the optical characteristics of a retardation layer. An optical laminate according to an embodiment of the present invention includes: a UV-absorbing adhesion layer; a protective layer; a polarizer; and a retardation layer. The retardation layer contains a liquid crystal compound. The UV-absorbing adhesion layer and the polarizer are arranged on a viewer side with respect to the retardation layer, and the UV-absorbing adhesion layer contains a base polymer, a UV absorber, and a dye compound whose absorption spectrum has a maximum absorption wavelength present in a wavelength region of from 380 nm to 430 nm.

公开(公告)号：US10569505B2

公开(公告)日：2020-02-25

申请号：US15569244

申请日：2016-07-20

Applicant: NITTO DENKO CORPORATION

Inventor： Hirofumi Katami ,  Atsushi Yasui

IPC: B32B7/02 ,  C09J11/04 ,  C09J201/00 ,  G02B5/30 ,  C09J7/20 ,  B32B7/12

Abstract: Provided is a polarizing film laminate comprising a pressure-sensitive adhesive layer, and a polarizing film 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 one principal surface of the adhesive layer in a thickness direction of the adhesive layer; and a refractive index adjustment zone formed over a given range from the other principal surface of the adhesive layer in the thickness direction and comprising the base pressure-sensitive adhesive material and material infiltrated into the base pressure-sensitive adhesive material and different from the base pressure-sensitive adhesive material, the refractive index adjustment zone having an average refractive index greater than a refractive index of the base pressure-sensitive adhesive material, and wherein the base pressure-sensitive adhesive material zone of the pressure-sensitive adhesive layer is located on the side of the polarizing film.

公开(公告)号：US20170121565A1

公开(公告)日：2017-05-04

申请号：US15301874

申请日：2015-03-27

Applicant: NITTO DENKO CORPORATION

Inventor： Atsushi Yasui ,  Hirofumi Katami ,  Masaki Mizutani

IPC: C09J7/02 ,  B32B7/12 ,  B32B27/06 ,  G09F9/35 ,  G02F1/1333 ,  G02F1/1335 ,  G02B1/16 ,  G06F3/044 ,  C09J133/06 ,  G02B5/30

CPC classification number: B32B7/12 ,  B32B27/06 ,  B32B2307/412 ,  B32B2307/42 ,  C09J7/385 ,  C09J133/066 ,  C09J2203/318 ,  G02B1/16 ,  G02B5/3033 ,  G02B5/3041 ,  G02F1/13338 ,  G02F1/133528 ,  G02F2202/22 ,  G06F3/041 ,  G06F3/044 ,  G09F9/35 ,  C08F2220/1858 ,  C08F226/10 ,  C08F220/20

Abstract: A transparent resin layer (A) having a surface resistance of 1.0×1013Ω/□ or less is placed more on the viewer side than the most viewer side polarizing film (1) in an image display device (B). The transparent resin layer (A) can be made from a transparent pressure-sensitive adhesive or a transparent liquid resin. Without degrading the reliability of the most viewer side polarizing film (1), the transparent resin layer (A) can impart an antistatic function at such a level as not to reduce the sensitivity of a touch panel.

公开(公告)号：US20140227502A1

公开(公告)日：2014-08-14

申请号：US14172141

申请日：2014-02-04

Applicant: NITTO DENKO CORPORATION

Inventor： Hirofumi Katami ,  Takahiro Nonaka ,  Hiroaki Kishioka

IPC: C09J7/02 ,  C08K5/3475

CPC classification number: G06F3/041 ,  B32B2457/202 ,  B32B2457/208 ,  C08K5/005 ,  C08K5/3475 ,  C09J7/29 ,  C09J7/385 ,  C09J133/066 ,  C09J139/06 ,  C09J2201/606 ,  C09J2203/318 ,  C09J2205/102 ,  C09J2400/163 ,  C09J2433/00 ,  G02F1/13338 ,  G06F2203/04103 ,  Y10T428/1036 ,  Y10T428/105 ,  Y10T428/1059 ,  Y10T428/1077 ,  Y10T428/2887

Abstract: Provided are an optical component capable of suppressing the occurrence of undulations, having an excellent corrosion inhibition effect while maintaining a high level of adhesion reliability and transparency, as well as a pressure-sensitive adhesive layer and a pressure-sensitive adhesive sheet that can produce such an optical component efficiently and at a low cost. The present invention provides an optical pressure-sensitive adhesive layer comprising a base polymer and a rust inhibitor, characterized in that the base polymer does not or substantially does not contain an acid group-containing monomer as a constituent monomer component, and that an 85° C. modulus of elasticity is not less than 5.0×104 Pa.

Abstract translation: 提供能够抑制起伏的发生的光学部件，在保持高水平的粘合可靠性和透明性的同时具有优异的防腐蚀效果，以及可以生产这样的粘合剂层和压敏粘合片 光学部件有效且成本低廉。 本发明提供一种包含基础聚合物和防锈剂的光学粘合剂层，其特征在于，所述基础聚合物不含或基本上不含有含酸基的单体作为构成单体组分，并且85° C.弹性模量不小于5.0×104 Pa。

公开(公告)号：US20140226085A1

公开(公告)日：2014-08-14

申请号：US14172193

申请日：2014-02-04

Applicant: NITTO DENKO CORPORATION

Inventor： Hirofumi Katami ,  Takahiro Nonaka ,  Hiroaki Kishioka

IPC: G02F1/1333 ,  G06F3/041 ,  C09J139/06

CPC classification number: G02F1/13338 ,  B32B2457/202 ,  B32B2457/208 ,  C08L33/04 ,  C08L2312/00 ,  C08L2312/06 ,  C08L2312/08 ,  C09J133/066 ,  C09J139/06 ,  G06F2203/04103 ,  Y10T428/1036 ,  Y10T428/105 ,  Y10T428/1059 ,  Y10T428/1077

Abstract: Provided are an optical component having an excellent corrosion inhibition effect while maintaining a high level of adhesion reliability and transparency, as well as a pressure-sensitive adhesive composition and a pressure-sensitive adhesive sheet that can produce such an optical component efficiently and at a low cost. The pressure-sensitive adhesive composition according to the present invention includes a rust inhibitor and a base polymer, characterized in that the base polymer does not or substantially does not contain an acid group-containing monomer as a constituent monomer component. Further provided is a pressure-sensitive adhesive sheet having a pressure-sensitive adhesive layer formed from such pressure-sensitive adhesive composition.

Abstract translation: 提供了具有优异的防腐蚀效果的光学部件，同时保持高水平的粘合可靠性和透明度，以及可以有效地和低成本地生产这种光学部件的压敏粘合剂组合物和压敏粘合片 成本。 根据本发明的压敏粘合剂组合物包括防锈剂和基础聚合物，其特征在于，所述基础聚合物不含或基本上不含有含酸基的单体作为构成单体成分。 还提供了一种具有由这种压敏粘合剂组合物形成的压敏粘合剂层的压敏粘合片。

公开(公告)号：US10852455B2

公开(公告)日：2020-12-01

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 ,  B32B7/12 ,  B32B27/08 ,  B32B27/36 ,  B32B27/06 ,  B32B7/02 ,  B32B37/12 ,  C09J7/38 ,  C09J11/02 ,  C09J11/04 ,  C09J5/02 ,  B29D11/00

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.

公开(公告)号：US10023766B2

公开(公告)日：2018-07-17

申请号：US15545124

申请日：2016-07-11

Applicant: NITTO DENKO CORPORATION

Inventor： Hirofumi Katami ,  Toru Umemoto ,  Hiroyuki Takao ,  Atsushi Yasui

IPC: B32B7/12 ,  C09J7/02 ,  B05D1/28 ,  C09J201/00 ,  C23C14/08

Abstract: As one sensor layer structure for a capacitive touch panel, a layer structure in which a transparent electroconductive layer is formed on each of opposite surfaces of a single film substrate, so-called GFD structure, is used. In the structure, for sufficiently suppressing internal reflection from the transparent electroconductive layer, it is necessary to employ a technique of forming one or more refractive index adjustment (IM) layers on each of the opposite surfaces of the single film substrate. This causes a problem that production yield is likely to deteriorate, and a production cost is increased. The present invention is directed to solving such a problem and, specifically, to laminating a refractive index adjustment zone-formed pressure-sensitive adhesive layer capable of being produced easily and at low cost, to each transparent electroconductive layer of a double-sided transparent electroconductive film, so as to effectively suppress internal reflection in the resulting laminate.

公开(公告)号：US10369768B2

公开(公告)日：2019-08-06

申请号：US15552706

申请日：2016-07-11

Applicant: NITTO DENKO CORPORATION

Inventor： Hirofumi Katami ,  Atsushi Yasui

IPC: B32B7/12 ,  B32B7/02 ,  C08K3/22 ,  G06F3/041 ,  B32B27/00 ,  C03C27/10 ,  C09J201/00 ,  C09J7/10

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：US10259193B2

公开(公告)日：2019-04-16

申请号：US15545069

申请日：2016-07-11

Applicant: NITTO DENKO CORPORATION

Inventor： Hirofumi Katami ,  Toru Umemoto ,  Hiroyuki Takao ,  Atsushi Yasui

IPC: B32B7/02 ,  H01B5/14 ,  B32B17/10 ,  B32B7/12 ,  H01B1/08 ,  G02B5/02

Abstract: In the case where a pressure-sensitive adhesive sheet comprising a pressure-sensitive adhesive layer having a refractive index adjustment zone is provided in such a manner that two PET separators are laminated to opposite surfaces of the pressure-sensitive adhesive layer, it is difficult to distinguish between obverse and reverse sides of the pressure-sensitive adhesive sheet itself. The present invention is directed to solving the above problems and, specifically, to offering a pressure-sensitive adhesive sheet having a refractive index adjustment zone capable of being easily produced at low cost, in a state in which it is preliminarily laminated with a substrate provided with an electroconductive layer, thereby making it possible to resolve complexity in handling (to easily distinguish between one surface defined by the refractive index adjustment zone and the other surface defined by the remaining zone).

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.