Optical film method of manufacture thereof and sheet polarizer

• Main Authors: OKADA YASUMASA, OGINO KENTARO, KOBAYASHI HITOSHI, TABATA HIRONORI, NISHIMURA KATSUMI, NOZATO SHOJI, SAWADA TAKAHIKO
• Format: Patent
• Language: English; Korean
• Published: 15.02.2003
• Edition: 7
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; CHEMISTRY; COMPOSITIONS BASED THEREON; GENERAL PROCESSES OF COMPOUNDING; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL; WORKING-UP

PURPOSE: Provided are an optical film which exhibits a small residual phase difference and a minimized variation of an optical axis, a method for manufacture thereof, and a sheet polarizer. CONSTITUTION: The optical film is made by melt extrusion using a noncrystalline thermoplastic resin, and has a...