SPONTANEOUSLY WINDING PRESSURE-SENSITIVE ADHESIVE SHEET AND METHOD FOR WORKING ADHEREND USING THE SAME

• Main Authors: NISHIO AKINORI, KIUCHI KAZUYUKI
• Format: Patent
• Language: English
• Published: 13.05.2010
• Subjects: ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; ADHESIVES; BASIC ELECTRIC ELEMENTS; CHEMISTRY; DYES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; PAINTS; POLISHES; SEMICONDUCTOR DEVICES; USE OF MATERIALS AS ADHESIVES

PROBLEM TO BE SOLVED: To provide a spontaneously winding pressure-sensitive adhesive sheet for temporary fixing which can prevent an adherend from "cracking" and "chipping" in adherend working, can suppress the warpage of the adherend after working, and can easily be peeled after grinding without damaging the adherend or leaving paste. SOLUTION: The spontaneously winding pressure-sensitive adhesive sheet includes a laminate of a heat-shrinkable base material layer having shrinkability at least in a uniaxial direction and an active energy ray-curable pressure-sensitive adhesive layer which cures upon irradiation with active energy rays and makes the product of a tensile modulus of elasticity and a thickness at 80°C 5×103to <1×105N/m. When a stimulus of heat is applied to the sheet, the sheet winds spontaneously from one end in one direction or from opposite two ends toward the center to form one or two cylindrical wound bodies. COPYRIGHT: (C)2010,JPO&INPIT