Loading patent…
AssigneeNitto Denko Corporation
InventorsYasuko Iwakawa, Shuusaku Nakano, Tetsuo Inoue, Shouichi Matsuda
Estimating the term…
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.
A method for producing a polarizing film having a dichroic ratio of 25 or more at a wavelength of 600 nm, comprising the following steps (1) to (3-2):
Dependencies are inferred from the claim text.