편광자 보호 필름, 편광판 및 액정 표시 장치

• Main Authors: MURATA KOUICHI, NAKASE KATSUKI, FUJITA ATSUSHI, SASAKI YASUSHI
• Format: Patent
• Language: Korean
• Published: 19.05.2020
• 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; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; 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

본 발명은, 액정 패널의 휨을 억제할 수 있는 편광자 보호 필름, 편광판 및 액정 표시 장치를 제공하는 것이다. 편광자의 한쪽의 면에 적층되는 편광자 보호용 폴리에스테르 필름으로서, 이하의 요건 (1) 및 (2)를 만족시키는 편광자 보호용 폴리에스테르 필름: (1) 편광자의 투과축과 평행한 방향에서의, 상기 폴리에스테르 필름의 수축력 F가 800N/m 이상 9000N/m 이하이다, (2) 편광자의 투과축과 평행한 방향에서의, 상기 폴리에스테르 필름의 수축력 F와 편광자의 흡수축과 평행한 방향에서의, 상기 폴리에스테르 필름의 수축력 F의 비(F/F)가 2.5 이상 12.0 이하이다. The purpose of the present invention is to provide a polarizer protective film, a polarizing plate, and a liquid crystal display device which are capable of suppressing warpage of a liquid crystal panel. This polarizer protective polyester film is laminated on one surface of a polarizer, and satisfies conditions (1) and (2) below. (1) In a direction parallel to the transmission axis of the polarizer, the contractile force Ff of the polyester film is 800-9000 N/m, and (2) a ratio (Ff/Fv) of the contractile force Ff of the polyester film in the direction parallel to the transmission axis of the polarizer to the contractile force Fv of the polyester film in a direction parallel to the absorption axis of the polarizer is 2.5 to 12.0.