POLARIZING FILM WITH ADHESIVE LAYER AND IMAGE DISPLAY DEVICE

• Main Authors: YASUI ATSUSHI, TOYAMA YUSUKE, FUJIWARA ARATA, KIMURA TOMOYUKI
• Format: Patent
• Language: English; Japanese
• Published: 20.12.2018
• Subjects: ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; ADHESIVES; CHEMISTRY; 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; DYES; FREQUENCY-CHANGING; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; NON-LINEAR OPTICS; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; OPTICAL ANALOGUE/DIGITAL CONVERTERS; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICAL LOGIC ELEMENTS; OPTICS; PAINTS; PHYSICS; POLISHES; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; USE OF MATERIALS AS ADHESIVES

To provide a polarizing film with an adhesive layer, which has an adhesive layer having an antistatic function and sufficient durability, and which shows little degradation in optical characteristics.SOLUTION: Disclosed is a polarizing film with an adhesive layer which includes a polarizing film and the adhesive layer provided on the polarizing film. The polarizing film has a transparent protective film on only one side of a polarizer. The adhesive layer is provided on the side of the polarizer in which the transparent protective film is not present. The adhesive layer is formed from an adhesive composition containing a (meth)acrylic polymer (A) and an onium-fluorine-containing imide anionic salt (B). The polarizing film with the adhesive layer satisfies such a condition that a change amount ΔP obtained from polarization degrees measured before and after the polarizing film with the adhesive layer is kept in an apparatus with controlled temperature and humidity at 60°C and 90% RH for 500 hours, is 0.13 or less.SELECTED DRAWING: None 【課題】帯電防止機能を有し、かつ耐久性を満足する粘着剤層を有し、光学特性の劣化が小さい粘着剤層付偏光フィルムを提供すること。【解決手段】偏光フィルムと、当該偏光フィルムに設けられた粘着剤層を有する粘着剤層付偏光フィルムであって、前記偏光フィルムは、偏光子の片側にのみ透明保護フィルムを有し、前記粘着剤層は、前記透明保護フィルムを有しない側の偏光子に設けられており、かつ前記粘着剤層は、（メタ）アクリル系ポリマー（Ａ）およびオニウム−フッ素含有イミドアニオン塩（Ｂ）を含有する粘着剤組成物から形成されたものであり、前記粘着剤層付偏光フィルムは、６０℃／９０％ＲＨの恒温恒湿機に５００時間投入前と投入後に測定した偏光度から求められる変化量ΔＰが０．１３以下を満足することを特徴とする粘着剤層付偏光フィルム。【選択図】なし