| 摘要 |
Provided is a thermally removable pressure-sensitive adhesive sheet that is produced using a plant-derived raw material, is global environmentally-friendly, has stable adherability before foaming by heating, and has good peelability after foaming by heating. The thermally removable pressure-sensitive adhesive sheet includes a substrate and a pressure-sensitive adhesive layer that is provided on at least one side of the substrate and made from a polyester-based pressure-sensitive adhesive composition containing a polyester including at least a lactic acid unit, a dibasic acid unit, and a glycol unit, a foaming agent, and a crosslinking agent, wherein the dibasic acid unit includes a dimer acid, the polyester has a weight average molecular weight of 20,000 to 200,000 and a glass transition temperature of -70 to -20°C as measured using a differential scanning calorimeter at a temperature rise rate of 20°C/minute, and the polyester has a hydroxyl value of 1 to 60 mgKOH/g. |
