Patent ID: 7910206

Claim:
A self-rolling pressure-sensitive adhesive sheet, comprising: a shrinkable film layer which is contractible in at least one axial direction; a restriction layer which restricts a contraction of the shrinkable film layer, said restriction layer being disposed on a side of the shrinkable film layer; and a pressure-sensitive adhesive layer disposed on the side of the restriction layer which is opposite to the side on which the shrinkable film layer is disposed, said self-rolling pressure-sensitive adhesive sheet being a releasable pressure-sensitive adhesive sheet, wherein the restriction layer comprises an elastic layer on the shrinkable film layer side and a non-shrinkable film layer on the side opposite to the shrinkable film layer side, wherein the elastic layer has 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, and wherein the pressure-sensitive adhesive layer or the pressure-sensitive adhesive layer after an adhesiveness decreasing treatment has a pressure-sensitive adhesive power (180° peeling, against a silicon mirror wafer, tensile speed: 300 mm/min) of 6.5 N/10 mm or less, and wherein the self-rolling pressure-sensitive adhesive sheet rolls up in one direction from an end to form one tubular roll or rolls up from two opposing ends toward a center of the two opposing ends to form two tubular rolls, when a heat treatment is applied to the self-rolling pressure-sensitive adhesive sheet at a predetermined temperature within a range of from 70° C. to 180° C., so that the self-rolling pressure-sensitive sheet is stimulated to induce the contraction of the shrinkable film layer.