| 摘要 |
PROBLEM TO BE SOLVED: To provide a packaging film having a gloss feeling, a good bag-making property, homogeneous physical properties without a thickness irregularity over all width of a polyolefinic film made by a high speed film forming and tentering, also to be adaptable to a mass production and a package using the same. SOLUTION: The film comprises a laminated body in which a sealing layer made mainly of a polyolefinic resin is formed on at least one side of a substrate mainly made of a polypropylenic resin and drawn and has a trim of an effective product of≥5,500 mm and is constructed so as a relationship between a coefficient of variation in a film thickness Y(%) and a trim of the product X (mm) to satisfy the relation, Y≤0.001X+4. COPYRIGHT: (C)2006,JPO&NCIPI |
