ADHESIVE SHEET AND METHOD FOR PRODUCING SAME

摘要

A pressure sensitive adhesive sheet containing, on a substrate or a release material, a resin layer that includes a resin part (X) containing a resin as a main component, and a particle part (Y) consisting of fine particles, at least a surface (±) of the resin layer being opposite to the side thereof on which the substrate or the release material is provided having pressure sensitive adhesiveness, wherein one or more concave portions exist on the surface (±), and when the surface (±) of the resin layer is adhered to a smooth surface of a light transmissive adherend having a smooth surface to give a laminate, the pressure sensitive adhesive sheet satisfies the following requirements (1) and (2). Requirement (1): in an environment at 23°C and 50% RH, the areal ratio (S 1 ) of the attached area against the smooth surface of the light transmissive adherend to the surface (±) before heating is 10 to 95%. Requirement (2): after the laminate is statically left in an environment at 80°C for 30 minutes, the area increase rate {[(S 2 - S 1 )/S 1 ] × 100} calculated from the areal ratio (S 2 ) of the attached area after heating of the smooth surface of the light transmissive adherend to the surface (±) and the areal ratio (S 1 ) thereof before heating, is -10 to 20%.