Patent ID: 8455083

Claim:
A pressure-sensitive adhesive sheet comprising: a base material; and a pressure-sensitive adhesive layer and formed therein with a plurality of through-holes passing through from one surface to the other surface, the base material comprising a first layer positioned on a pressure-sensitive adhesive layer-side and a second layer positioned on a side opposite to the pressure-sensitive adhesive layer, the first layer comprising a resin composition, the resin composition containing: 50 to 88 wt % of a polyolefin-based resin (A); 10 to 48 wt % of a styrene-based resin and/or an acrylic-based resin (B) excluding the polyolefin-based resin (A); and 2.0 to 30 wt % of a pigment (C), the second layer containing a polyolefin-based ionomer resin (D) as a main constituent, and the ratio of thickness between the first layer and the second layer being 80:20 to 97:3.0.