OPTICAL LAMINATED FILM MANUFACTURING METHOD

摘要

Provided is an optical laminated film manufacturing method for manufacturing an optical laminated film in which a polarizing film is stacked on a stretched film having a stretch axis in one in-plane direction, wherein the optical laminated film manufacturing method is characterized by the following: including a rubbing step for rubbing the surface of the stretch film in a prescribed rubbing direction and a polarizing film forming step for coating a liquid crystalline solution including a dichroic material on the surface of the stretch film that was rubbed in the rubbing step, and for forming the polarizing film by orienting the dichroic material in a direction orthogonal to the rubbing direction; that the stretch axis of the stretch film and the orthogonal direction form the rubbing angle; and that the rubbing direction in the rubbing step is determined on the basis of a rubbing angle that is larger than the intersection angle formed by the stretch axis of the stretch film and an absorption axis of the polarizing film.