Cellulose acylate film, stretched cellulose acylate film, and method and apparatus for producing the same

摘要

According to the present invention, a cellulose acylate film difficult to be broken even if the stretching ratio is increased upon stretching and whose retardation (Re) is easily controllable to a desired value can be produced by melt film forming. Accordingly, a stretched cellulose acylate film highly oriented and having an appropriate retardation (Re) required from liquid crystal display device manufacturers can be produced.