| 摘要 |
PROBLEM TO BE SOLVED: To provide a highly transparent biaxially stretched polyester film having few defects.SOLUTION: A biaxially stretched polyester film is 50 to 400 μm thick wherein the number of coreless defects having a height of not lower than 0.5 μm and a length of not shorter than 20 μm on the film surface is not more than 10 pieces/m. |
