OPTICAL FILM, METHOD FOR PRODUCING THE SAME, POLARIZING PLATE EMPLOYING OPTICAL FILM, AND DISPLAY

摘要

A method for producing an optical film by solution spreading film formation method in which occurrence of conveyance trouble of stripped film, failure of a film due to pushing, and failure in condense due surface temperature drop of a roll are prevented, and an optical film excellent in transparency and planarity in which haze of the film is not increased even in case of high drawing and the contrast is enhanced when it is incorporated in a liquid crystal display. A polarizing plate and a display are also provided. The method for producing an optical film comprises a step for forming a spread film (web) by spreading resin solution (dope) on a metal support and stripping it from the metal support after a portion of solvent is evaporated, a step for drying the stripped web while gripping the opposite ends thereof and carrying the web without drawing, and a step for drawing the web in the lateral direction wherein the quantity of residual solvent contained in the web is reduced by 5-15 mass% before the opposite ends of the web are gripped in the next step.