STRETCHED POLYPROPYLENE FILM

摘要

PROBLEM TO BE SOLVED: To provide a stretched polypropylene film having a low shrinkage comparable to that of polyethylene terephthalate (PET) at 150°C and having a high rigidity.SOLUTION: In the stretched polypropylene film, a polypropylene resin constituting the film satisfies the following conditions (1) to (5); and the lower limit of a plane orientation coefficient of the film is 0.0125. (1) The lower limit of a meso-pentad fraction is 96%. (2) The upper limit of a copolymer amount other than propylene is 0.1 mol%. (3) The lower limit of a melt flow rate (MFR) measured under 2.16 kgf at 230°C is 1 g/10 min. (4) The lower limit of (mass average molecular weight (Mw))/(number average molecular weight (Mn)) is 5.5. (5) The lower limit of (z+1 average molecular weight (Mz+1))/(number average molecular weight (Mn)) is 50.