公开(公告)号：US20130280438A1

公开(公告)日：2013-10-24

申请号：US13926549

申请日：2013-06-25

Applicant: Nitto Denko Corporation

Inventor： Yasuko Iwakawa ,  Shuusaku Nakano ,  Tetsuo Inoue ,  Shouichi Matsuda

IPC: G02B5/30

CPC classification number: G02B5/3033 ,  G02F1/133528

Abstract: A method for producing a polarizing film includes a step (1) of preparing a lyotropic liquid crystalline solution having electric conductivity of not more than 50 μS/cm (expressed in terms of 0.05% by weight) and containing a dichroic dye and a solvent, a step (2) of preparing a base material having at least one surface subjected to a hydrophilization treatment, and a step (3) of coating the solution prepared in the step (1) on the hydrophilized surface of the base material prepared in the step (2) at a coating rate of not less than 100 mm/second, and drying the solution. The polarizing film produced in the method has a dichroic ratio of 25 or more at a wavelength of 600 nm.

Abstract translation: 偏光膜的制造方法具有制造电导率为50μS/ cm以下（以0.05重量％表示）并含有二色性染料和溶剂的溶致液晶溶液的工序（1） 制备具有至少一个经过亲水化处理的表面的基材的工序（2）和将工序（1）中制备的溶液涂布在步骤（1）中制备的基材的亲水化表面上的步骤（3） （2），涂布速度不小于100mm /秒，并干燥该溶液。 该方法中产生的偏振膜在波长600nm处的二色性比为25以上。