公开(公告)号：US20140044947A1

公开(公告)日：2014-02-13

申请号：US13933055

申请日：2013-07-01

Applicant: NITTO DENKO CORPORATION

Inventor： Hiroaki SAWADA ,  Takeharu KITAGAWA ,  Takashi KAMIJO

IPC: G02B1/08

CPC classification number: G02B1/08 ,  B32B2457/202 ,  C08J5/18 ,  C08J7/04 ,  C08J2385/04 ,  C08J2429/04 ,  G02B5/3033 ,  Y10T428/265

Abstract: A method for producing a polarizer (20) comprises the steps of: (A) stretching a polyvinyl alcohol-based resin layer (10) to obtain a stretched layer (14); (B) immersing the stretched layer (14) in a dyeing liquid (23) containing iodine to obtain a dyed layer (18) in which absorbance thereof determined from a tristimulus value Y is from 0.4 to 1.0 (transmittance T=40% to 10%); and (C) removing a part of iodine adsorbed in the dyed layer (18) so that the absorbance of the dyed layer (18) decreases by 0.03 to 0.7, provided that the absorbance of the dyed layer (18) is controlled so that it does not become less than 0.3.

公开(公告)号：US20160025910A1

公开(公告)日：2016-01-28

申请号：US14874028

申请日：2015-10-02

Applicant: NITTO DENKO CORPORATION

Inventor： Hiroaki SAWADA ,  Takeharu Kitagawa ,  Takashi Kamijo

IPC: G02B5/30

CPC classification number: G02B5/3033 ,  B32B27/08 ,  B32B27/32 ,  B32B27/325 ,  B32B27/34 ,  B32B27/36 ,  B32B27/365 ,  B32B2250/24 ,  B32B2255/10 ,  B32B2255/26 ,  B32B2270/00 ,  B32B2307/21 ,  B32B2307/40 ,  B32B2307/4026 ,  B32B2307/412 ,  B32B2307/416 ,  B32B2307/42 ,  B32B2307/514 ,  B32B2457/20

Abstract: A method for producing a polarizer comprises the steps of: (A) forming a polyvinyl alcohol-based resin layer on a support made of an optically transparent thermoplastic resin; (B) stretching a polyvinyl alcohol-based resin layer together with the support to obtain a stretched layer; (C) immersing the stretched layer in a dyeing liquid containing iodine to obtain a dyed layer in which absorbance thereof determined from a tristimulus value Y is from 0.4 to 1.0 (transmittance T=40% to 10%); and (D) removing a part of iodine adsorbed in the dyed layer so that the absorbance of the dyed layer decreases by 0.03 to 0.7, provided that the absorbance of the dyed layer is controlled so that it does not become less than 0.3. The support may be used as an optical film laminated to the polarizer.

Abstract translation: 偏振片的制造方法包括以下步骤：（A）在由光学透明的热塑性树脂制成的支持体上形成聚乙烯醇类树脂层; （B）与支持体一起拉伸聚乙烯醇系树脂层，得到拉伸层; （C）将拉伸层浸渍在含碘染色液中，得到由三刺激值Y确定的吸光度为0.4〜1.0（透光率T = 40％〜10％）的染色层。 和（D）除去吸附在染色层中的一部分碘，使得染色层的吸光度降低0.03至0.7，条件是染色层的吸光度被控制为不变得小于0.3。 支撑体可以用作层叠到偏振器的光学膜。

公开(公告)号：US20140016198A1

公开(公告)日：2014-01-16

申请号：US13933032

申请日：2013-07-01

Applicant: NITTO DENKO CORPORATION

Inventor： Hiroaki SAWADA ,  Takeharu KITAGAWA ,  Takashi KAMIJO

IPC: G02B5/30

CPC classification number: G02B1/08 ,  B32B2457/202 ,  C08J5/18 ,  C08J7/04 ,  C08J2385/04 ,  C08J2429/04 ,  G02B5/3033 ,  Y10T428/265

Abstract: A method for producing a polarizer (20) comprises the steps of: (A) stretching a polyvinyl alcohol-based resin layer (10) to obtain a stretched layer (14); (B) immersing the stretched layer (14) in a dyeing liquid (23) containing iodine to obtain a dyed layer (18) in which absorbance thereof determined from a tristimulus value Y is from 0.4 to 1.0 (transmittance T=40% to 10%); and (C) removing a part of iodine adsorbed in the dyed layer (18) so that the absorbance of the dyed layer (18) decreases by 0.03 to 0.7, provided that the absorbance of the dyed layer (18) is controlled so that it does not become less than 0.3.

Abstract translation: 一种偏光镜（20）的制造方法，其特征在于，包括以下工序：（A）拉伸聚乙烯醇类树脂层（10），得到拉伸层（14）。 （B）将拉伸层（14）浸渍在含有碘的染色液（23）中，得到由三色刺激值Y求出的吸光度为0.4〜1.0的透明层（18），透光率T = 40〜10 ％）; 以及（C）除去吸附在染色层（18）中的一部分碘，使得染色层（18）的吸光度减少0.03至0.7，只要染色层（18）的吸光度被控制，使得 不会小于0.3。