公开(公告)号：US10437095B2

公开(公告)日：2019-10-08

申请号：US15510703

申请日：2016-06-24

Applicant: NITTO DENKO CORPORATION

Inventor： Toshiyuki Iida ,  Takeharu Kitagawa

IPC: G02F1/1335 ,  G02F1/13363 ,  G02B5/30 ,  G02F1/1333

Abstract: As a result of a reduction in thickness of an IPS liquid crystal display panel, curl has started to occur in a structure where an optical film such as a polarizer or a retardation film is laminated to the IPS liquid crystal display panel. The present invention is directed to thinning a polarizer which is easily expandable and contractable, and thinning a retardation film located between the polarizer and an IPS liquid crystal display panel to enable the polarizer to come closer to the IPS liquid crystal display panel than ever before to thereby prevent curl of the IPS liquid crystal display panel.

公开(公告)号：US09921342B2

公开(公告)日：2018-03-20

申请号：US14856635

申请日：2015-09-17

Applicant: NITTO DENKO CORPORATION

Inventor： Takeharu Kitagawa ,  Yuki Kida

IPC: G02B1/14 ,  G02B5/30

CPC classification number: G02B1/14 ,  G02B5/3033

Abstract: A polarizing plate of the present invention includes: a first adhesion layer, a transparent protective layer, a second adhesion layer, and a polarizing film in the stated order, wherein: the first adhesion layer has a thickness of 10 μm or more; the transparent protective layer has a thickness of 30 μm or less; the transparent protective layer has a moisture permeability of 200 g/m2/24 hr or less; the second adhesion layer has a bulk water absorption ratio of 10 wt % or less; the polarizing film has a thickness of 10 μm or less; and the polarizing film has a boric acid content of 18 wt % or less with respect to a weight of the polarizing film.

公开(公告)号：US09405050B2

公开(公告)日：2016-08-02

申请号：US14920322

申请日：2015-10-22

Applicant: NITTO DENKO CORPORATION

Inventor： Akinori Izaki ,  Takeharu Kitagawa ,  Shusaku Goto ,  Takashi Kamijo ,  Tomohiro Mori ,  Minoru Miyatake

IPC: G02B5/30 ,  B29C55/02 ,  B29C55/06 ,  B05D5/06 ,  C08J7/04 ,  B29D11/00 ,  B29K29/00 ,  G02F1/1335 ,  B29K67/00

Abstract: The present invention provides a thin polarizing film which has only a small environmental load and has excellent optical characteristics.The thin polarizing film is produced by forming a polyvinyl alcohol-based resin layer on a thermoplastic resin substrate. The thin polarizing film has a thickness of 10 μm or less, a single axis transmittance of 42.0% or more, a polarization degree of 99.95% or more, and an iodine content of 17.6 grams per 400×700 square millimeters or less, which is measured by an ion chromatography method.

公开(公告)号：US20160084995A1

公开(公告)日：2016-03-24

申请号：US14854150

申请日：2015-09-15

Applicant: NITTO DENKO CORPORATION

Inventor： Takeharu Kitagawa

IPC: G02B1/14 ,  G02F1/1335 ,  B32B7/12 ,  G02B5/30

CPC classification number: G02B1/14 ,  B32B7/02 ,  B32B7/12 ,  B32B27/08 ,  B32B27/18 ,  B32B27/306 ,  B32B27/308 ,  B32B27/32 ,  B32B27/325 ,  B32B27/36 ,  B32B2250/24 ,  B32B2307/412 ,  B32B2307/42 ,  B32B2307/514 ,  B32B2307/7246 ,  B32B2307/7265 ,  B32B2457/202 ,  B32B2551/00 ,  G02B5/3033

Abstract: A polarizing plate of the present invention includes: a polarizing film; and a transparent protective layer provided on at least one surface of the polarizing film, wherein: the polarizing film and the transparent protective layer are laminated through a first adhesion layer; the polarizing film has a thickness of 10 μm or less; the transparent protective layer has a total thickness 6 or less times as large as the thickness of the polarizing film; the transparent protective layer has a moisture permeability of 200 g/m2/24 hr or less; and the first adhesion layer has a bulk water absorption ratio of 10 wt % or less.

Abstract translation: 本发明的偏振片包括：偏光膜; 以及透明保护层，设置在所述偏振膜的至少一个表面上，其中：所述偏振膜和所述透明保护层通过第一粘合层层压; 偏光膜的厚度为10μm以下， 透明保护层的总厚度为偏振片的厚度的6倍以下; 透明保护层的透湿性为200g / m 2/24小时以下， 并且第一粘合层的体积吸水率为10重量％以下。

公开(公告)号：US10551540B2

公开(公告)日：2020-02-04

申请号：US14900568

申请日：2014-06-20

Applicant: NITTO DENKO CORPORATION

Inventor： Takeharu Kitagawa ,  Yuki Kida ,  Shinsuke Akizuki ,  Atsushi Yasui ,  Yusuke Toyama ,  Takaaki Ishii

IPC: C09J133/06 ,  C09J5/06 ,  C09J7/38 ,  C09J7/40 ,  C09J7/22 ,  C08L33/06 ,  C08K5/13 ,  C08K5/14 ,  G02B5/30 ,  B32B7/12 ,  C09J7/10 ,  G02F1/1335 ,  C08K5/00

Abstract: Provided are a separator-attached adhesive layer structure which comprises a separator having moderate light peelability with respect to an adhesive layer and exhibits excellent processability and durability, and a production method therefor. The production method comprises: a first step of forming a layer of an adhesive composition containing a (meth)acryl-based polymer, a peroxide and a phenolic antioxidant, on a release treatment surface of a separator subjected to a release treatment; and a second step of, after completion of the first step, heating the adhesive composition to cause cross-linking therein so as to be formed as an adhesive layer.

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：US09488756B2

公开(公告)日：2016-11-08

申请号：US15068995

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

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：US09453953B2

公开(公告)日：2016-09-27

申请号：US14920322

申请日：2015-10-22

Applicant: NITTO DENKO CORPORATION

Inventor： Akinori Izaki ,  Takeharu Kitagawa ,  Shusaku Goto ,  Takashi Kamijo ,  Tomohiro Mori ,  Minoru Miyatake

IPC: G02B5/30 ,  B29C55/02 ,  B29C55/06 ,  B05D5/06 ,  C08J7/04 ,  B29D11/00 ,  B29K29/00 ,  G02F1/1335 ,  B29K67/00

CPC classification number: G02B5/305 ,  B05D5/06 ,  B29C55/026 ,  B29C55/06 ,  B29D11/00644 ,  B29K2029/04 ,  B29K2067/003 ,  B29K2995/0034 ,  C08J7/047 ,  C08J2323/20 ,  C08J2367/02 ,  C08J2429/04 ,  G02B5/3033 ,  G02F1/133528

Abstract: The present invention provides a thin polarizing film which has only a small environmental load and has excellent optical characteristics.The thin polarizing film is produced by forming a polyvinyl alcohol-based resin layer on a thermoplastic resin substrate. The thin polarizing film has a thickness of 10 μm or less, a single axis transmittance of 42.0% or more, a polarization degree of 99.95% or more, and an iodine content of 17.6 grams per 400×700 square millimeters or less, which is measured by an ion chromatography method.

Abstract translation: 薄偏光膜通过在热塑性树脂基板上形成聚乙烯醇类树脂层来制造。 薄偏光膜的厚度为10μm以下，单轴透射率为42.0％以上，偏光度为99.95％以上，碘含量为17.6克/ 400×700平方毫米以下，为 通过离子色谱法测定。

公开(公告)号：US09442235B2

公开(公告)日：2016-09-13

申请号：US14200721

申请日：2014-03-07

Applicant: NITTO DENKO CORPORATION

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

IPC: 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.

Abstract translation: 一种制造光学膜层叠体的连续卷筒纸的方法，可用于将包括偏振膜的光学膜片层压并且形成为与所述光学板相对应的尺寸的光学膜片的工艺，以提供给被馈送的光学板的表面 公开了层压位置。 通过对形成在基板上的热塑性树脂基板和PVA型树脂层的层叠体进行单轴2阶段拉伸，将PVA类树脂层的厚度缩小到10μm以下，制作偏光膜， 二色性材料被吸收在PVA型树脂层中。 载体膜通过粘合剂层可释放地附着到包括偏振膜的光学膜层压板的连续幅材上。 对光学膜层叠体和粘合剂层进行缺陷检查。