Barrier film and method for production thereof
AssigneeDai Nippon Printing Co., Ltd.
InventorsKoujiro Ohkawa, Atsuo Tsuzuki, Kuniaki Yoshikata
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Abstract
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/m2.day, and the oxygen permeability, within a range of from 2.0 to 0.000001 cc/m2.day.
Claims10
A barrier-forming film comprising a substrate film having a vapor-deposited inorganic oxide film, further subjected to an annealing treatment, wherein said annealing treatment is carried out in an air at a temperature within a range of from 55 to 150° C. for a heating treatment time within a range of from 12 hours to three and the steam permeability is within a range of from 2.0 to 0.000001 g/m2.day and the oxygen permeability is within a range of from 2.0 to 0.000001 cc/m2.day.atm.
Dependencies are inferred from the claim text.