Method for preparing polarizing film, and polarizing film and polarizer obtained therefrom

Abstract

Provided are a method for preparing a polarizing film, and a polarizing film and a polarizer obtained therefrom. The preparation method includes: subjecting a polyvinyl alcohol (PVA)-based film to swelling, dyeing, crosslinking, and stretching, where a solution used in at least one of the steps of swelling, dyeing, crosslinking or stretching includes an organic aromatic boric acid. In the process of preparing the polarizing film, the introduction of the organic aromatic boric acid can inhibit the polyene reaction of the optical film, thereby enhancing the stability of the polarizing film. Meanwhile, the incorporation of the aromatic group from the organic aromatic boric acid can improve the stability of iodine molecules within the polarizing film, and increase the water resistance and the ultraviolet blocking capability of the polarizing film.

Dependencies are inferred from the claim text.