METHOD OF PRODUCING OPTICAL FILM, OPTICAL FILM, POLARIZING PLATE AND IMAGE DISPLAY DEVICE

• Main Author: MICHIHATA, ISAMU
• Format: Patent
• Language: English; French; Japanese
• Published: 17.07.2008
• Subjects: AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; 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; INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULARARTICLES; INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS; NON-LINEAR OPTICS; OPTICAL ANALOGUE/DIGITAL CONVERTERS; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICAL LOGIC ELEMENTS; OPTICS; 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; TRANSPORTING; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

It is intended to provide a method of producing an optical film which is widely usable for improving contrast. This object can be achieved by providing a method of producing an optical film which contains a resin and an additive, characterized by comprising heat melting and kneading the resin with the additive to form a hot molten matter, and casting a resin solution having been prepared by dissolving this hot molten matter in a solvent to thereby give an optical film. L'invention concerne un procédé de fabrication d'un film optique est largement utilisable pour améliorer le contraste. Cet objectif peut être atteint en utilisant procédé de fabrication d'un film optique qui contient une résine et un adhésif. Ledit procédé est caractérisé en ce qu'il comporte les opérations consistant à faire fondre par la chaleur et à malaxer la résine avec l'additif pour former une matière fondue chaude et à couler une solution de résine préparée par dissolution de cette matière fondue chaude dans un solvant pour produire un film optique.