PRESSURE-SENSITIVE ADHESIVE SHEET AND COVERED STRUCTURE

摘要

A pressure-sensitive adhesive sheet and a covered structure which are less apt to adversely influence hard-disk devices and the like. The covered structure is constituted of a pressure-sensitive adhesive sheet comprising a pressure-sensitive adhesive layer and a pressure-sensitive adhesive sheet substrate and a release sheet comprising a release agent layer and a release sheet substrate, the adhesive sheet being covered with the release sheet so that the release agent layer is in contact with the pressure-sensitive adhesive layer. In the covered structure, the pressure-sensitive adhesive sheet has a silicone content of 500 mu g/m<2> or lower. The total amount of NOx<->, Cl<->, PO4<3->, F<->, K<+>, Na<+>, and Ca<2+> contained in the pressure-sensitive adhesive sheet is preferably 20 mg/m<2> or smaller. The pressure-sensitive adhesive sheet, when heated at 85 DEG C for 30 minutes, preferably has a gas generation amount of 20 mg/m<2> or smaller.