Optical adhesive tape

• Main Authors: OKITA, NATSUKO, OCHI, GENKI, NORO, HIROSHI, IKESHIMA, HIROMI, HASHIMOTO, NAOKI
• Format: Patent
• Language: Chinese; English
• Published: 16.10.2022
• Subjects: ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; ADHESIVES; ADVERTISING; CHEMISTRY; CRYPTOGRAPHY; DISPLAY; DISPLAYING; DYES; EDUCATION; 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-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; PAINTS; PERFORMING OPERATIONS; PHYSICS; POLISHES; SEALS; SIGNS; TRANSPORTING; USE OF MATERIALS AS ADHESIVES

The purpose of the present invention is to provide an optical adhesive tape for maintaining an excellent appearance of a tiling display in which a plurality of image display devices are aligned in a tile shape, the optical adhesive tape being capable of maintaining transparency and preventing gaps between the plurality of image display devices from being conspicuous, even in a usage environment. The optical adhesive tape 10A of the present invention has a laminated structure in which are laminated: a base material 1 having a first surface 1a and a second surface 1b; and an adhesive layer 2 laminated to the first surface 1a of the base material 1. A mean dimensional change rate in a transverse direction and a machine direction, when the optical adhesive tape 10A is heated for 500 hours in an environment with a temperature of 60 DEG C and a relative humidity of 90%, is within ±0.15%. A 300% tensile residual stress value of the adhesive layer 2 is 10 N/cm2 or less.