PRESSURE-SENSITIVE ADHESIVE SHEET WITH SPONTANEOUSLY ROLLING PROPERTY

• Main Authors: KIUCHI KAZUYUKI, NISHIO AKINORI
• Format: Patent
• Language: English; Korean
• Published: 07.07.2011
• Subjects: ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; ADHESIVES; BASIC ELECTRIC ELEMENTS; CHEMISTRY; DYES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; 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; POLISHES; SEMICONDUCTOR DEVICES; TRANSPORTING; USE OF MATERIALS AS ADHESIVES

The pressure-sensitive adhesive sheet with spontaneously rolling property of the invention is a pressure-sensitive adhesive sheet comprising a contractible film layer, an elastic layer, a rigid film layer, an intermediate layer, and a pressure-sensitive adhesive layer satisfying the following requirements and laminated in this order, which is capable of undergoing spontaneous rolling from one end part in one direction or from opposing two end parts toward a center to form one or two cylindrical rolls when a stimulus causing a contraction is applied: the elastic layer having a thickness of from 15 to 150 µm and a shear modulus at 80°C of from 1×10 4 Pa to 5×10 6 Pa, the intermediate layer having a shear modulus at 23°C of from 1×10 4 Pa to 4×10 7 Pa, and the pressure-sensitive adhesive layer having a pressure-sensitive adhesive strength of the pressure-sensitive adhesive layer or the pressure-sensitive adhesive layer after an adhesion reducing treatment (180° peeling, vs. silicon mirror wafer, tensile rate: 300 mm/minute) of 6.5 N/10 mm or less.