Moisture barrier laminated film

Abstract

A moisture barrier laminated film including an inorganic barrier layer and a hygroscopic layer on a plastic base material. The inorganic barrier layer is disposed closer to a high moisture atmosphere than the hygroscopic layer. The moisture barrier laminated film is characterized in that a quasi-hygroscopic layer is provided between the inorganic barrier layer and the hygroscopic layer, and water solubility coefficients in the quasi-hygroscopic layer and in the hygroscopic layer satisfy a condition represented by the following expression (1): 0.1S2≤S1<S2 (1), where S1 is a water solubility coefficient at 85° C. in the quasi-hygroscopic layer, and S2 is a water solubility coefficient at 85° C. in the hygroscopic layer.

Dependencies are inferred from the claim text.