Double-sided pressure-sensitive adhesive sheet

摘要

The present invention provides a double-sided pressure-sensitve adhesive sheet excellent in waterproof property (water stopping property) and impact resistance. The present invention relates to a double-sided pressure-sensitive adhesive sheet including a polyolefin foam substrate and an acrylic pressure-sensitive adhesive layer on both surfaces of the polyolefin foam substrate, wherein the polyolefin foam substrate has a volume percentage of closed cells of 70% or more and a degree of crosslinking of from 3 to 60 wt%, and the acrylic pressure-sensitive adhesive layer is formed from a pressure-sensitive adhesive composition containing: an acrylic polymer formed from a component including, as an essential monomer component thereof, an alkyl (meth)acrylate having a linear or branched alkyl group; and a tackifying resin.