CPC B32B 27/302 (2013.01) [B32B 7/06 (2013.01); B32B 7/12 (2013.01); B32B 17/06 (2013.01); B32B 17/10 (2013.01); B65G 49/069 (2013.01); C03C 17/36 (2013.01); C09J 7/243 (2018.01); C09J 7/381 (2018.01); C09J 7/385 (2018.01); C09J 11/06 (2013.01); C09J 11/08 (2013.01); B32B 2307/536 (2013.01); B32B 2419/00 (2013.01); C09J 2301/312 (2020.08); C09J 2421/00 (2013.01); C09J 2423/006 (2013.01); C09J 2427/006 (2013.01); C09J 2433/00 (2013.01); C09J 2467/006 (2013.01)] | 20 Claims |
1. A pressure-sensitive adhesive sheet comprising a waterproof layer and a pressure-sensitive adhesive layer on at least a surface of the waterproof layer,
wherein the pressure-sensitive adhesive layer comprises, as adhesion-tightening agent, a phosphate,
the phosphate is a compound represented by the formula (2) or a salt thereof,
wherein R1 is —OH or —(OCH2CH2)nOR3, R2 represents —(OCH2CH2)mOR4, n and m are independently an integer between 1 and 30, and R3 and R4 are independently selected from linear or branched alkyl groups, aryl groups or alkylaryl groups, and
the pressure-sensitive adhesive layer has a surface hardness of 0.5 MPa or less.
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