| 摘要 |
<p>A radiation-cure removal type pressure-sensitive adhesive sheet which has highly stable pressure-sensitive adhesive properties and has excellent strippability after irradiation with radiation is provided using a plant-derived starting material. The radiation-cure removal type pressure-sensitive adhesive sheet includes a pressure-sensitive adhesive layer formed from a polyester-based pressure-sensitive adhesive composition which comprises a polyester comprising lactic acid units, dibasic acid units, and glycol units, a radiation-curable resin, an initiator for radiation-induced reaction, and a crosslinking agent, and is characterized in that the dibasic acid units include a dimer acid, the polyester has a glass transition temperature of -70 to -20ºC, a weight-average molecular weight of 20,000-200,000, and a hydroxyl value of 1-60 mg-KOH/g, the amount of the radiation-curable resin is 30-70 parts by weight per 100 parts by weight of the polyester, the amount of the initiator for radiation-induced reaction is 3-10 wt.% of the radiation-curable resin, and the pressure-sensitive adhesive layer before being irradiated with radiation has a gel content of 20-80 wt.%.</p> |
