| 摘要 |
PROBLEM TO BE SOLVED: To raise an oxygen barrier property and vapor deposition adhesiveness by furnishing an aluminum oxide and aluminum-coexisting metallic vapor- deposited layer on a base material consisting of nonorientated polypropylene- based film with a specific film thickness, and further laminating vapor deposition resin layer having a specific film thickness thereon. SOLUTION: At least one surface of a nonoriented polypropylene-bosed film is provided with an aluminum oxide and aluminum-coexisting vapor-deposited layer with an average film thickness of 10-80 nm. Furthermore, a vapor- deposition resin layer is laminated thereon with a thickness of 10-100 nm. In this case, a vapor deposition layer having much aluminum oxide existing in the proximity of the film is formed on the film under a vacuum condition by a reaction vapor deposition method, and a vapor deposition layer containing much aluminum is formed thereon. This gives an enhancement of vapor deposition adhesive strength and the antiabrasive property, resulting in obtaining an aluminum vapor deposited nonoriented polypropylene film effective to foods packing in particular in terms of an enhanced gas barrier property, particularly, an enhanced steam barrier property. |
