| abstract |
Disclosed is an adhesive sheet having an expandable adhesive layer 2 on one side or both sides of a base 1, wherein the base is composed of a laminate having a laminated structure in which a resin film and a non-woven fabric, or a resin film and a paper, or a resin film and a resin film are laminated with an adhesive for lamination, the expandable adhesive layer contains containing an epoxy resin comprising a polyfunctional epoxy resin, a phenol resin as a curing agent, an imidazole-based compound as a curing catalyst and a temperature-sensitive foaming agent, a bending moment according to JIS P 8125 of the adhesive sheet before foaming and curing of the expandable adhesive layer is 40 to 600 gf•cm. |