| abstract |
An adhesive sheet (11), wherein the adhesive sheet (11) comprises an acrylic base polymer having a crosslinked structure and an acrylic oligomer having a glass transition temperature of 60 ℃ or higher. Storage elastic modulus G 'of adhesive sheet at 25 ℃ and 1 Hz' 25 A loss tangent tan delta at 5kPa to 75kPa, 25 ℃ and 1Hz 25 A loss tangent tan delta of 0.2 to 0.45 at 100 ℃ and 1Hz 100 0.2 to 0.45, tan delta 25 And tan delta 100 The difference is-0.09 to 0.09, and the glass transition temperature is-15 ℃ or lower. |