Adhesive sheet, article and method for producing article

An adhesive sheet comprising:

• a first face;
• and
• a second face,
• wherein:
• the first face and the second face are opposite to each other,
• the first face includes a thermally expandable thermosetting adhesive layer A containing a thermosetting resin and an expansion agent,
• the second face includes a thermally expandable thermosetting adhesive layer B containing a thermosetting resin and an expansion agent and having a different composition from a composition of the thermally expandable thermosetting adhesive layer A,
• the thermally expandable thermosetting adhesive layer B is laminated on one face of the thermally expandable thermosetting adhesive layer A directly or through another layer,
• the first face has a higher shear adhesive strength than a shear adhesive strength of the second face,
• the thermally expandable thermosetting adhesive layer A and the thermally expandable thermosetting adhesive layer B each have a thickness direction expansion rate of 130% or more after heating at 150° C. for 60 minutes, and
• the shear adhesive strength of the second face of the adhesive sheet before thermal expansion is less than 0.5 MPa.