HERMETIC PACKAGE

摘要

PROBLEM TO BE SOLVED: To provide a package which can be easily unsealed with relatively weak force, which can be easily checked as to whether it has been reliably sealed, and which has high moisture resistance. SOLUTION: The hermetic package comprises first and second opposite sheet walls which are heat-bonded with a hermetic storage space provided therein. The first sheet wall comprises an olefin based resin layer laminated on an internal surface side of a base layer. The second sheet wall comprises an easy-to-peel layer laminated on an olefin based resin layer laminated on an internal surface side of a base layer, wherein the easy-to-peel layer contains a modified olefin based resin comprising an olefin based resin and a vinyl monomer. The olefin based resins laminated on the internal surface sides of the respective base layers comprise a polyethylene with an average density of 0.920 to 0.970.