METHOD AND DEVICE FOR TREATING OPTICAL FILM AND METHOD OF MANUFACTURING OPTICAL FILM

摘要

A method and a device for treating an optical film capable of reducing coating troubles such as horizontal step irregularity and coating stripes which are liable to occur when a functional layer such as a reflection preventive layer is applied onto a long film. The method is characterized in that a liquid on the surface of the long film is removed after the long film being carried is rubbed against an elastic body wetted with the liquid. The method is further characterized in that the coefficient of static friction on the surface of the elastic body is 0.2 to 0.9.