ADHESIVE SHEET FOR IMAGE DISPLAY DEVICE, METHOD FOR MANUFACTURING IMAGE DISPLAY DEVICE, AND IMAGE DISPLAY DEVICE

• Main Authors: MUKAIGAITO KOHEI, MANSEI YOICHIRO, NAKAMURA TOMOYUKI, FURUZONO YOSHITOSHI, HOSHI YOSUKE
• Format: Patent
• Language: English; Japanese
• Published: 09.05.2016
• Subjects: ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; ADHESIVES; ADVERTISING; CHEMISTRY; 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; DYES; EDUCATION; FREQUENCY-CHANGING; LABELS OR NAME-PLATES; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; 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 LOGIC ELEMENTS; OPTICS; PAINTS; PERFORMING OPERATIONS; PHYSICS; POLISHES; SEALS; SIGNS; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; TRANSPORTING; USE OF MATERIALS AS ADHESIVES

PROBLEM TO BE SOLVED: To provide an adhesive sheet for image display devices provided with an adhesive layer which, even when a step formed in an object to be adhered is high, has the excellent ability of filling up the step, and which excels in adhesiveness and reliability even when a hardening reaction by ultraviolet irradiation, etc., after pasting is nonexistent, a method for manufacturing an image display device using the adhesive sheet, and the image display device.SOLUTION: Provided is an adhesive sheet for image display devices having at least one adhesive layer including a (meth)acryloyl group, the adhesive layer differing in the content of the (meth)acryloyl group between the surface and the reverse side. Also provided is a method of manufacturing the adhesive sheet for image display devices having a step for irradiating one plane of the adhesive layer with an ultraviolet ray after the adhesive layer is processed into a sheet and differentiating the content of the (meth)acryloyl group between the surface and the reverse side of the adhesive layer.SELECTED DRAWING: Figure 1 【課題】 被着物上に形成される段差が高い場合であっても、段差への埋め込み性に優れ、貼り合わせ後に紫外線照射等による硬化反応がなくとも接着性及び信頼性にも優れる粘着層を備える画像表示装置用粘着シート及びそれを用いた画像表示装置の製造方法及び画像表示装置を提供する。【解決手段】 （メタ）アクリロイル基を含む粘着層を少なくとも1層有し、前記粘着層はおもて面と裏面の（メタ）アクリロイル基含有量が異なる粘着層である、画像表示装置用粘着シート。粘着層をシート状に加工した後、粘着層の一方の面から紫外線を照射し粘着層のおもて面と裏面の（メタ）アクリロイル基含有量が異なるようにする工程を有する前記の画像表示装置用粘着シートの製造方法。【選択図】 図１