Patent ID: 9291744
Filing Date: 2016-03-22
CPC Classification: B32B,C08J,G02B,Y10T

Claim Text:
1. A polarizer comprising a stretched layer of polyvinyl alcohol-based resin including iodine adsorbed therein; wherein said layer of polyvinyl alcohol-based resin has a thickness of 0.4 to 7 μm and includes polymer chains oriented substantially in one direction, said polymer chain including a highly oriented crystallized portion, and said layer of polyvinyl alcohol-based resin surrounding the crystallized portion is amorphous; and wherein said iodine adsorbed in said layer of polyvinyl alcohol-based resin is present in said layer of polyvinyl alcohol-based resin in the form of polyiodine ion complex adsorbed to the crystallized portion of said layer of polyvinyl alcohol-based resin to provide the polarizer with a dichroic property, whereby the polarizer exhibits an absorbance of 0.359 to 0.380 and a polarization degree of 99.9% or higher, and the absorbance is determined based on a Y value of an XYZ colorimetric system as defined by JIS Z 8701.