MANUFACTURING METHOD OF OPTICAL FILM

摘要

PROBLEM TO BE SOLVED: To provide a manufacturing method of an optical film producing no spot-like flaw on its surface and causing no optical irregularity. SOLUTION: Resin pellets are transported to an extruder using an inert gas with an oxygen concentration of 10 ppm or below as a medium and subjected to melt extrusion molding. The manufacturing method of the optical film and the optical film obtained thereby are also disclosed. COPYRIGHT: (C)2008,JPO&INPIT