LAMINATE, OPTICAL FILM, POLARIZING PLATE, AND IMAGE DISPLAY DEVICE

• Main Authors: KUWABARA HIROKI, MATSUMOTO AYAKO, YOKOTA TOMOAKI, TAMURA AKIO, IIZUMI TAKASHI, WATANABE SOICHIRO
• Format: Patent
• Language: English; Japanese
• Published: 25.12.2023
• Subjects: ADVERTISING; CHEMISTRY; COMPOSITIONS BASED THEREON; CRYPTOGRAPHY; 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; DISPLAY; DISPLAYING; EDUCATION; ELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR; ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; FREQUENCY-CHANGING; LABELS OR NAME-PLATES; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; METALLURGY; NON-LINEAR OPTICS; OPTICAL ANALOGUE/DIGITAL CONVERTERS; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICAL LOGIC ELEMENTS; OPTICS; ORGANIC MACROMOLECULAR COMPOUNDS; PHYSICS; SEALS; SIGNS; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; THEIR PREPARATION OR CHEMICAL WORKING-UP

To provide a laminate excellent in both peelability and liquid crystal alignment of a base material, an optical film, a polarizing plate, and an image display device.SOLUTION: A laminate has a first base material, and a first retardation layer provided adjacent to the first base material. The first base material is a temporary support for transfer. The first retardation layer is a layer obtained by fixing a liquid crystal compound that contains a polymer not having a photo-alignment group and is horizontally aligned. When the secondary ion intensity of the polymer in the first retardation layer is measured by a time-of-flight secondary ion mass spectrometry while irradiating, with an ion beam, from a surface of the first retardation layer facing the first base material toward a surface on the opposite side of the first base material, an average value IB1 of the secondary ion intensity derived from the polymer in a base material-side surface layer area is larger than an average value IA1 of the secondary ion intensity derived from the polymer in an air-side surface layer area.SELECTED DRAWING: None 【課題】本発明は、基材の剥離性および液晶配向性のいずれにも優れた積層体、光学フィルム、偏光板および画像表示装置を提供することを課題とする。【解決手段】第１基材と、第１基材に隣接して設けられる第１位相差層と、を有する積層体であって、第１基材が、転写用の仮支持体であり、第１位相差層が、光配向性基を有さないポリマーを含有する、水平配向した液晶化合物を固定してなる層であり、第１位相差層の第１基材側の表面から第１基材と反対側の表面に向かって、イオンビームを照射しながら飛行時間型二次イオン質量分析法で第１位相差層中におけるポリマーの二次イオン強度を測定した際に、空気側表層領域におけるポリマー由来の二次イオン強度の平均値ＩＡ１よりも、基材側表層領域におけるポリマー由来の二次イオン強度の平均値ＩＢ１が大きい、積層体。【選択図】なし