Barrier film, laminate, and packaging bag

Abstract

A barrier film according to the first aspect of the present disclosure contains, in the following order: a base material layer containing polypropylene; a vapor deposition layer containing an inorganic oxide; and a gas barrier layer, in which the base material layer has a multilayer structure in which at least three layers, which are a first skin layer, a core layer, and a second skin layer, are provided in this order, and in which when a softening temperature of each of the layers of the base material layer is measured by local thermal analysis (LTA), at least one softening temperature of the first skin layer is 120° C. or higher, at least one softening temperature of the core layer is 190° C. or higher, and at least one softening temperature of the second skin layer is 160° C. or lower.

Dependencies are inferred from the claim text.