| 摘要 |
PROBLEM TO BE SOLVED: To secure various kinds of excellent barrier properties specific to a biaxially oriented film by constituting a base film layer of the biaxially oriented film with a low deposition cost and also form an entirely fully homogeneous deposited film, and to provide a packaging film capable of surely assuring a linear or curved progress of tearing a liquid pouring nozzle in a desired direction. SOLUTION: A biaxially oriented base film layer 2 which may have a deposited layer is interposed between two sealant layers 3 and 4. The base film layer 2 has a tear-guiding flaw 5 consisting of intermittent or continuous molten traces 6 formed by irradiation with a laser beam. COPYRIGHT: (C)2008,JPO&INPIT
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