Manufacturing method of high-durability polaroid

Abstract

The invention discloses a manufacturing method of a high-durability polaroid, and belongs to the technical field of polaroids. The transition high-valence metal cation additive is added in the polaroid manufacturing process, and polar bonds and coordinate bonds are formed by the transition high-valence metal cation additive and hydroxyl groups of PVA by means of the characteristic that the transition high-valence metal cation additive can generate polynuclear hydroxyl bridge complex ions through hydrolytic polymerization, so that the crosslinking strength of PVA is enhanced. Meanwhile, the high-valence metal ions have high coordination ability and good high-temperature stability, and can promote generation and stability of linear polyiodide ions, so that the polarizing film with excellent durability, especially the polarizing film with excellent thermal stability, can be prepared. And the phenomena of polarization degree reduction, cracks and red light leakage caused by boric acid reduction or linear I5-instability at high temperature are effectively solved.