| 摘要 |
The present invention relates to: an elongated polyvinyl alcohol film 1 having a thickness of no more than 55 μm and a length of at least 500 m, wherein at least one of the two end sections in the lengthwise direction of the film is a cut end section A, A' formed by a cutting blade, and the maximum height roughness (Rz) of cut end surfaces B, B' of the cut end sections is no more than 2.5 μm over a segment of the film having a length of at least 500 m; and a roll formed by winding the polyvinyl alcohol film into a roll shape. |
