POLARIZING FILM AND PRODUCTION METHOD OF THE SAME, OPTICAL FILM AND IMAGE DISPLAY DEVICE

PROBLEM TO BE SOLVED: To provide a production method of a polarizing film by which the polarizing film can be prevented from curling while adhesion performance of an adhesive layer between a polarizer and a transparent protective film is increased.SOLUTION: The present invention provides a productio...

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Bibliographische Detailangaben
Hauptverfasser:	SHUDO SHUNSUKE, OMINE TOSHIKI, KUNISHIMA KENTARO, SHINAGAWA MASA, YAMAZAKI TATSUYA, SAITO TAKESHI, IKEDA TETSURO, TSUCHINAGA MAKOTO
Format:	Patent
Sprache:	eng ; jpn
Schlagworte:	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 NON-LINEAR OPTICS OPTICAL ANALOGUE/DIGITAL CONVERTERS OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS OPTICAL LOGIC ELEMENTS OPTICS PHYSICS TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a production method of a polarizing film by which the polarizing film can be prevented from curling while adhesion performance of an adhesive layer between a polarizer and a transparent protective film is increased.SOLUTION: The present invention provides a production method of a polarizing film having a first transparent protective film disposed on one surface of a polarizer and a second transparent protective film disposed on the other surface via an adhesive layer. The method includes an adhesion step of adhering the polarizer to the first transparent protective film and adhering the polarizer to the second transparent protective film via the adhesive layer that is obtained by first irradiating the first transparent protective film side with active energy rays and then irradiating the second transparent protective film side with active energy rays to cure an active energy ray-curable adhesive composition. The first transparent protective film has a transmittance of less than 5% for rays at a wavelength of 365 nm; and the second transparent protective film has a transmittance of 80% or more for rays at a wavelength of 365 nm.SELECTED DRAWING: Figure 2 【課題】偏光子と透明保護フィルムとの間の接着剤層の接着性能を高めつつ、偏光フィルムのカールを防止可能な偏光フィルムの製造方法を提供すること。【解決手段】接着剤層を介して、偏光子の片面に第１透明保護フィルム、他面に第２透明保護フィルムが設けられている偏光フィルムの製造方法であって、最初に、第１透明保護フィルム側から活性エネルギー線を照射し、次いで第２透明保護フィルム側から活性エネルギー線を照射して、活性エネルギー線硬化型接着剤組成物を硬化させることにより得られた接着剤層を介して、偏光子および第１透明保護フィルム、ならびに偏光子および第２透明保護フィルムを接着させる接着工程を含み、第１透明保護フィルムは、波長３６５ｎｍの光線透過率が５％未満であり、第２透明保護フィルムは、波長３６５ｎｍの光線透過率が８０％以上である偏光フィルムの製造方法。【選択図】図２