PROBLEM TO BE SOLVED: To provide a pressure sensitive adhesive sheet not only having excellent moisture vapor permeability but also having excellent water proofness and strength, and in addition, preventing the outflow of an adhesive component and deterioration of strength.SOLUTION: A pressure sensitive adhesive sheet includes: a support medium having moisture vapor permeability and an adhesive layer laminated at least on one surface of the support medium. The adhesive layer has an adhesive component-including region and a plurality of void regions independent to each other and perforating the adhesive layer in thickness direction.COPYRIGHT: (C)2015,JPO&INPIT【課題】 透湿性に優れるだけでなく、耐水性にも強度にも優れ、しかも粘着成分の流出及び強度の低下が防止された粘着シート等を提供する。【解決手段】 透湿性を有する支持体と、該支持体の少なくとも一方の面上に積層された粘着層とを備え、前記粘着層は、粘着成分含有領域と、前記粘着層を厚さ方向に貫通している互いに独立した複数の空隙領域とを有する粘着シート。【選択図】 図1
