| abstract |
Provided is a PSA sheet having a PSA layer. The PSA layer includes a layer A forming at least one surface thereof. The PSA sheet has an adhesive strength N0 of 2.0 N/10mm or greater, after one day at room temperature following application of the layer A side to a surface of an alkaline float glass plate as an adherend having a contact angle of 5°-10° with distilled water; has an N1 to N0 reduction rate of 30 % or lower, wherein N1 is a water-resistant adhesive strength measured after stored at room temperature for one day, immersed in water for 30 minutes, taken out from the water and then residual water is wiped off and has an N2 to N0 reduction rate of 40 % or higher, wherein N2 is a water-peel strength measured after stored at room temperature for one day, 20 µL distilled water is dropped onto the adherend and is allowed to enter a PSAlayer/adherend interfacial edge. N2 is measured at a tensile speed of 300 mm/min at a peel angle of 180°. |