公开(公告)号：US09618668B2

公开(公告)日：2017-04-11

申请号：US13728473

申请日：2012-12-27

Applicant: NITTO DENKO CORPORATION

Inventor： Takeharu Kitagawa ,  Takuya Nakazono ,  Shusaku Goto ,  Minoru Miyatake ,  Tomohiro Mori ,  Takashi Kamijo

IPC: G02B5/30 ,  B32B41/00

CPC classification number: G02B5/305 ,  B32B41/00 ,  B32B2457/20 ,  G02B5/3033

Abstract: A method of producing a roll of an optical film laminate strip including a polarizing film includes the steps of: forming a continuous web of optical film laminate including a polarizing film which consists of a polyvinyl alcohol type resin layer and has a thickness of 10 μm or less, wherein the polarizing film is formed by performing an stretching sub-step of subjecting a laminate comprising a continuous web of thermoplastic resin substrate and a polyvinyl alcohol type resin layer formed on the substrate, to a uniaxial stretching in a lengthwise direction of the laminate based on 2-stage stretching consisting of preliminary in-air stretching and in-boric-acid-solution stretching; cutting the continuous web of optical film laminate along a direction parallel to the length direction to form at least one continuous web of laminate strip having a given width; and winding the continuous web of laminate strip having the given width into a roll.

公开(公告)号：US09459390B2

公开(公告)日：2016-10-04

申请号：US14918186

申请日：2015-10-20

Applicant: NITTO DENKO CORPORATION

Inventor： Takeharu Kitagawa ,  Takuya Nakazono ,  Shusaku Goto ,  Minoru Miyatake ,  Tomohiro Mori ,  Takashi Kamijo

IPC: B32B41/00 ,  G02B5/30 ,  G02B1/08 ,  G02B27/28

CPC classification number: G02B5/305 ,  G02B1/08 ,  G02B5/3033 ,  G02B27/288 ,  Y10T428/1041 ,  Y10T428/14 ,  Y10T428/15

Abstract: A method of producing a roll of a continuous web of an optical film laminate, usable in a process of laminating an optical film sheet including a polarizing film and formed to a size corresponding to that an optical panel to a surface of the optical panel being fed to a lamination position, is disclosed. The polarizing film is prepared by subjecting a laminate including a thermoplastic resin substrate and a PVA type resin layer formed on the substrate, to uniaxial 2-stage stretching to reduce a thickness of the PVA type resin layer to 10 μm or less, and causing a dichroic material to be absorbed in the PVA type resin layer. A carrier film is releasably attached to the continuous web of optical film laminate including the polarizing film, through an adhesive layer. A defect inspection is performed for the optical film laminate and the adhesive layer.

公开(公告)号：US20160195645A1

公开(公告)日：2016-07-07

申请号：US15069004

申请日：2016-03-14

Applicant: NITTO DENKO CORPORATION

Inventor： Atsushi Yasui ,  Yuusuke Toyama ,  Tomoyuki Kimura ,  Masayuki Satake ,  Shusaku Goto ,  Takeharu Kitagawa ,  Minoru Miyatake ,  Tomohiro Mori ,  Takashi Kamijo

IPC: G02B1/16 ,  B32B27/30 ,  G02F1/1335 ,  B32B27/08 ,  G02B1/14 ,  G02B5/30

CPC classification number: G02B1/16 ,  B32B23/08 ,  B32B23/20 ,  B32B27/08 ,  B32B27/306 ,  B32B27/308 ,  B32B27/36 ,  B32B2250/02 ,  B32B2250/03 ,  B32B2250/04 ,  B32B2250/40 ,  B32B2255/10 ,  B32B2255/26 ,  B32B2307/21 ,  B32B2307/4026 ,  B32B2307/412 ,  B32B2307/42 ,  B32B2307/516 ,  B32B2307/702 ,  B32B2307/704 ,  B32B2307/706 ,  B32B2307/708 ,  B32B2457/202 ,  C08K3/105 ,  C08K3/24 ,  C09J7/22 ,  C09J7/29 ,  C09J7/38 ,  C09J133/066 ,  C09J2201/606 ,  C09J2203/318 ,  C09J2205/102 ,  C09J2433/00 ,  G02B1/08 ,  G02B1/14 ,  G02B5/3025 ,  G02B5/3033 ,  G02B5/305 ,  G02F1/133533 ,  C08F2220/1825 ,  C08F2220/185 ,  C08F220/20 ,  C08F2220/301 ,  C08F220/06

Abstract: A pressure-sensitive adhesive layer-attached polarizing film of the invention includes: a polarizing film; and a pressure-sensitive adhesive layer provided on the polarizing film, wherein the polarizing film includes a polarizer and a transparent protective film provided on only one side of the polarizer, the pressure-sensitive adhesive layer is provided on a side of the polarizer where the transparent protective film is absent, and the pressure-sensitive adhesive layer is made of a pressure-sensitive adhesive composition containing a (meth)acryl-based polymer (A) and an alkali metal salt (B). The pressure-sensitive adhesive layer-attached polarizing film has a pressure-sensitive adhesive layer with an antistatic function and satisfactory durability and whose optical properties are less likely to be degraded.

Abstract translation: 本发明的带有粘合剂层的偏光膜包括：偏光膜; 以及设置在所述偏振膜上的压敏粘合剂层，其中所述偏振膜包括偏振片和仅设置在所述偏振片一侧的透明保护膜，所述粘合剂层设置在所述偏振片的一侧， 透明保护膜不存在，并且压敏粘合剂层由含有（甲基）丙烯酸类聚合物（A）和碱金属盐（B）的压敏粘合剂组合物制成。 带有粘合剂层的偏光膜具有抗静电功能和令人满意的耐久性的粘合剂层，其光学性能不太可能劣化。

公开(公告)号：US09354373B2

公开(公告)日：2016-05-31

申请号：US14095517

申请日：2013-12-03

Applicant: NITTO DENKO CORPORATION

Inventor： Shusaku Goto ,  Takeshi Saitou ,  Masashi Shinagawa ,  Yuuki Nakano ,  Minoru Miyatake

IPC: G02B5/30 ,  B32B37/12 ,  B29C55/02 ,  B32B38/10 ,  B32B38/14 ,  B32B37/24 ,  B32B38/00 ,  B29K29/00

CPC classification number: G02B5/305 ,  B29C55/026 ,  B29K2029/04 ,  B32B37/12 ,  B32B38/10 ,  B32B38/14 ,  B32B2037/1253 ,  B32B2037/1276 ,  B32B2037/243 ,  B32B2038/0028 ,  B32B2307/42 ,  B32B2309/105 ,  B32B2457/202

Abstract: A method of producing a polarizing plate according to an embodiment of the present invention includes: stretching and dyeing a laminate including a resin substrate and a polyvinyl alcohol-based resin layer formed on one side of the resin substrate to produce a polarizing film on the resin substrate; laminating a first protective film on the polarizing film on an opposite side to the resin substrate; and peeling the resin substrate, followed by laminating a second protective film on the polarizing film on a side from which the resin substrate has been peeled. The laminating of at least one of the first protective film and the second protective film is performed through an adhesive having a moisture content of 10% or less.

Abstract translation: 根据本发明的实施方式的偏振片的制造方法包括：在树脂基板的一面上形成树脂基板和聚乙烯醇类树脂层的层叠体的拉伸和染色，以在树脂上形成偏振膜 基质; 在与树脂基板相反的一侧的偏振膜上层压第一保护膜; 剥离树脂基板，然后在剥离树脂基板的一侧的偏光膜上层叠第二保护膜。 第一保护膜和第二保护膜中的至少一个的层压通过水分含量为10％以下的粘合剂进行。

公开(公告)号：US20140139919A1

公开(公告)日：2014-05-22

申请号：US14056178

申请日：2013-10-17

Applicant: NITTO DENKO CORPORATION

Inventor： Shusaku Goto ,  Yuuki Nakano ,  Kentaro Ikeshima ,  Nobuyuki Haida ,  Minoru Miyatake ,  Osamu Kaneko

IPC: G02B5/30 ,  B29D11/00

CPC classification number: G02B5/3033 ,  B29D11/00644 ,  B32B37/24 ,  B32B38/0012 ,  B32B38/10 ,  B32B2037/243 ,  B32B2038/0028 ,  B32B2307/42 ,  B32B2457/202 ,  B32B2551/00 ,  G02B1/08 ,  G02B1/14 ,  G02B5/30 ,  G02B5/305

Abstract: A method of manufacturing a polarizing plate according to an embodiment of the present invention includes: stretching and dyeing a laminate having a resin substrate and a polyvinyl alcohol-based resin layer formed on at least one side of the resin substrate to produce a polarizing film on the resin substrate; laminating an optically functional film on the laminate on a polarizing film side to produce an optically functional film laminate; and peeling the resin substrate from the optically functional film laminate. The peeling is performed so that an angle α formed between a surface of the optically functional film laminate immediately before the peeling and a peeling direction of the resin substrate is smaller than an angle β formed between the surface of the optically functional film laminate immediately before the peeling and a peeling direction of the polarizing film.

Abstract translation: 根据本发明的实施方式的偏光板的制造方法包括：在树脂基板的至少一面形成有树脂基板和聚乙烯醇系树脂层的层压体的拉伸和染色，以在 树脂基板; 在偏振膜侧的层压体上层叠光学功能膜，制作光学功能性膜层叠体; 以及从光学功能膜层压体剥离树脂基板。 进行剥离，使得在剥离之前的光学功能膜层叠体的表面与树脂基板的剥离方向之间形成的角度α小于角度＆bgr; 在剥离前的光学功能性膜层叠体的表面与偏振膜的剥离方向之间形成。

公开(公告)号：US20130216805A1

公开(公告)日：2013-08-22

申请号：US13846168

申请日：2013-03-18

Applicant: NITTO DENKO CORPORATION

Inventor： Atsushi Yasui ,  Yuusuke Toyama ,  Takaaki Ishii ,  Masakuni Fujita ,  Tomoyuki Kimura ,  Masayuki Satake ,  Shusaku Goto ,  Takeharu Kitagawa ,  Minoru Miyatake ,  Tomohiro Mori ,  Takashi Kamijo

IPC: G02B5/30 ,  B05D5/10 ,  C09J7/02

CPC classification number: G02B5/3025 ,  B05D5/10 ,  C09J7/385 ,  G02B5/3033 ,  Y10T156/10 ,  Y10T428/1059

Abstract: A pressure-sensitive adhesive optical film of the invention comprises an optical film and a pressure-sensitive adhesive layer provided on the optical film, wherein the pressure-sensitive adhesive layer has a thickness (μm) standard deviation of 0.12 μm or less. The pressure-sensitive adhesive optical film makes it possible to reduce the problem of visible unevenness caused by a pressure-sensitive adhesive layer.

公开(公告)号：US11269212B2

公开(公告)日：2022-03-08

申请号：US16127585

申请日：2018-09-11

Applicant: NITTO DENKO CORPORATION

Inventor： Takehito Fuchida ,  Shusaku Goto ,  Katsunori Takada ,  Yoshitsugu Kitamura

IPC: G02F1/1335 ,  G02B5/30 ,  G02B5/02 ,  G02F1/13363

Abstract: An object of the present invention is to provide a polarizer having a neutralized hue without any increase in transmittance. A polarizer of the present invention having a transmittance parameter represented by the equation (1) of 0.8 or more and a hue parameter represented by the equation (2) of 5 or less: Transmittance parameter=T420/T550  (1) in the equation (1), T420 represents a parallel transmittance at a wavelength of 420 nm and T550 represents a parallel transmittance at a wavelength of 550 nm; Hue parameter=(a2+b2)  (2) in the equation (2), a represents a parallel hue value ‘a’ and b represents a parallel hue value ‘b’.

公开(公告)号：US09864101B2

公开(公告)日：2018-01-09

申请号：US15218083

申请日：2016-07-25

Applicant: NITTO DENKO CORPORATION

Inventor： Nobuyuki Haida ,  Shusaku Goto ,  Takeharu Kitagawa

IPC: G02B1/04 ,  G02B5/30 ,  G02B1/08 ,  G02F1/1335

CPC classification number: G02B1/04 ,  G02B1/08 ,  G02B5/3033 ,  G02B5/3083 ,  G02F1/133528 ,  C08L29/04

Abstract: Provided a polarizing film which comprising a substrate and a PVA-based resin, wherein it has good adhesion between the substrate and the PVA-based resin to allow the PVA-based resin to become less likely to be peeled off from the substrate during stretching and/or conveyance, and exhibits excellent appearance, wherein the polarizing film is obtained by providing a layer of a PVA-based resin on a substrate and stretching the substrate and the PVA-based resin layer together. The PVA-based resin contains a modified PVA, wherein the modified PVA exists in an amount allowing a modification rate with respect to the entire PVA-based resin to be in a range of 0.04 mol % to 1.4 mol %.

公开(公告)号：US09744750B2

公开(公告)日：2017-08-29

申请号：US14639818

申请日：2015-03-05

Applicant: NITTO DENKO CORPORATION

Inventor： Takeharu Kitagawa ,  Takuya Nakazono ,  Shusaku Goto ,  Minoru Miyatake ,  Tomohiro Mori ,  Takashi Kamijo

IPC: B29C65/52 ,  B29C65/54 ,  B32B37/12 ,  B32B37/20 ,  B32B38/04 ,  B32B38/10 ,  B32B38/18 ,  B32B41/00 ,  B32B43/00 ,  B32B37/00 ,  B29C55/02 ,  B29C55/06 ,  G02B5/30 ,  B29K29/00 ,  B29K67/00 ,  B32B37/18 ,  B32B38/00 ,  B32B37/24

CPC classification number: B32B37/0046 ,  B29C55/023 ,  B29C55/026 ,  B29C55/065 ,  B29K2029/04 ,  B29K2067/003 ,  B29K2995/0034 ,  B32B37/025 ,  B32B37/12 ,  B32B37/18 ,  B32B37/182 ,  B32B37/203 ,  B32B38/0004 ,  B32B38/04 ,  B32B38/10 ,  B32B38/145 ,  B32B38/18 ,  B32B2037/243 ,  B32B2038/045 ,  B32B2307/42 ,  B32B2309/72 ,  B32B2457/20 ,  B32B2457/202 ,  B32B2457/206 ,  B32B2457/208 ,  B32B2551/00 ,  G02B5/305 ,  Y10T156/1059 ,  Y10T156/1062 ,  Y10T156/1082 ,  Y10T156/12 ,  Y10T156/1322

Abstract: A method of producing an optical panel assembly including the polarizing film in a continuous manner by laminating a polarizing film to a surface of a rectangular-shaped optical panel, is disclosed. The polarizing film is formed by performing a step of subjecting a laminate including a continuous web of a thermoplastic resin substrate and a PVA type resin layer formed on the substrate, to a 2-stage stretching consisting of a preliminary in-air stretching and an in-boric-acid-solution stretching, to reduce a thickness of the PVA type resin layer to 10 μm or less, and a step of causing a dichroic material to be absorbed in the PVA type resin layer.

公开(公告)号：US20170090087A1

公开(公告)日：2017-03-30

申请号：US15271973

申请日：2016-09-21

Applicant: NITTO DENKO CORPORATION

Inventor： Shusaku Goto ,  Masahiro Yaegashi

IPC: G02B5/30 ,  C09D129/04

CPC classification number: G02B5/3033 ,  C08L2205/02 ,  C09D129/04 ,  C08L29/14 ,  C08K3/01

Abstract: There is provided a polarizer having a non-polarization portion and excellent in uniformity. A polarizer according to an embodiment of the present invention includes a resin film containing iodine, the polarizer having formed therein a transparent portion having a transmittance higher than that of another portion, wherein: the resin film contains a polyvinyl alcohol-based resin; and a saponification degree of the polyvinyl alcohol-based resin of the transparent portion is higher than a saponification degree of the polyvinyl alcohol-based resin of the another portion.