| 摘要 |
Provided is a pressure-sensitive adhesive sheet that maintains a high adhesive force and adhesion reliability (particularly, repulsion resistance and holding power) when the sheet is bonded, and can be easily peeled off from an adherend to easily separate and disassociate a bonded portion when the sheet is peeled off from the adherend. Solution The pressure-sensitive adhesive sheet according to the present invention is a pressure-sensitive adhesive sheet having an adhesive layer on at least one surface of a substrate, wherein the substrate is a heat-shrinkable film, and the adhesive layer comprises an adhesive composition comprising an acrylic copolymer and a thermally expandable micro particle, the acrylic copolymer comprising a monomer mixture of the following monomers (a1), (a2), and (a3) in the following contents as a constituent: (a1) an alkyl (meth)acrylate monomer having an alkyl group having 4 to 12 carbon atoms and having a glass transition temperature less than 0° C. when the monomer is formed into a homopolymer: 40 to 90% by weight, (a2) a monomer having at least one nitrogen atom and one ethylenically unsaturated bond within the molecule: 5 to 40% by weight, and (a3) a monomer having one ethylenically unsaturated bond within the molecule and having a glass transition temperature of not less than 0° C. when the monomer is formed into a homopolymer ((a2) is excluded): 0 to 40% by weight (the content (% by weight) represents the content of each monomer based on the total weight of the monomers (a1), (a2), and (a3) (100% by weight)).
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