| 摘要 |
PROBLEM TO BE SOLVED: To provide a manufacturing method of a polypropylene resin film which can suppress thickness irregularity of an obtained polypropylene resin film. SOLUTION: The manufacturing method of a polypropylene resin film comprises a step of forming an original film 4a from a polypropylene resin 4, and a step of superposing the original film 4a and a protection film 12 composed of a polyester resin or a polyolefin resin, and rolling up the resultant. COPYRIGHT: (C)2009,JPO&INPIT |
