Barrier film and method for production thereof

摘要

The present invention provides a barrier-forming film (A) useful for manufacturing various packaging container, which has a higher barrier-formability to prevent permeation of oxygen gas or steam, and a manufacturing method thereof. The barrier-forming film of the invention comprises a substrate film (1) having a vapor-deposited film (2) of an inorganic oxide, and by applying an annealing treatment thereto to limit the steam permeability within a range of from 2.0 to 0.000001 g/m<2>.day, and the oxygen permeability, within a range of from 2.0 to 0.000001 cc/m<2>.day.