POLYVINYL ALCOHOL POLYMER FILM AND POLARIZATION FILM

• Main Authors: ISOZAKI TAKANORI, HARITA SHIGEYUKI
• Format: Patent
• Language: English; Korean
• Published: 25.11.2010
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; CHEMISTRY; COMPOSITIONS BASED THEREON; DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING; FREQUENCY-CHANGING; GENERAL PROCESSES OF COMPOUNDING; METALLURGY; NON-LINEAR OPTICS; OPTICAL ANALOGUE/DIGITAL CONVERTERS; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICAL LOGIC ELEMENTS; OPTICS; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; PHYSICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL; WORKING-UP

PURPOSE: A polyvinyl alcohol-based film, a manufacturing method thereof, and a polarizing film including thereof are provided to prevent wrinkles from being generated during an extension process of the film. CONSTITUTION: A manufacturing method of a polyvinyl alcohol-based film comprises a step of drying the polyvinyl alcohol-based film while passing the film through a first drying surface and a second drying surface. The length of the first drying surface is 8~200 meters. The moisture content of the polyvinyl alcohol-based film when separating the film from the first drying surface, is 10~50wt%.