Patent ID: 9329307
Filing Date: 2016-05-03
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 a given direction being the direction of stretching, said polymer chain including a crystallized portion of polyvinyl alcohol-based resin oriented substantially in said given direction, and said layer of polyvinyl alcohol-based resin surrounding the crystallized portion of said polyvinyl alcohol-based resin 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, whereby the polarizer exhibits an absorbance in the range of from 0.3 to 0.4 and said polyiodine ion complex adsorbed to the crystallized portion of said layer of polyvinyl alcohol-based resin provides the polarizer with dichrosim within a visible light range.