| abstract |
An adhesive sheet comprising a base material and an adhesive layer, wherein the base material does not contain chlorine atoms, any one direction in a plan view of the base material is used as a reference direction, and the plan view and the reference direction are adjusted. The angles formed are 0°, 10°, 20°, 30°, 40°, 50°, 60°, 70°, 80°, 90°, 100°, 110°, 120°, 130°, 140°, Among the 18 directions of 150°, 160°, and 170°, the direction with the smallest increase in tensile stress obtained by subtracting the tensile stress at 100% elongation from the tensile stress at 200% elongation is set as the first In one measurement direction, in the first measurement direction, the tensile stress from 10% elongation to 100% elongation is in the range of 8 to 30 MPa, and in the first measurement direction, from elongation The tensile stress from 100% to 200% elongation is in the range of 10 to 40 MPa. The above-mentioned adhesive sheet has good expandability. |