| abstract |
An object of the present invention is to provide a film excellent in smoothness, heat resistance, and quality, and its purpose is to provide a polyolefin film having a protruding peak height SPk of at least one side of 300 nm or less, and the polyolefin film having a temperature of 130° C. The thermal shrinkage in the main orientation direction after the heat treatment for 15 minutes was 2% or less, and the sum of the crystallite size of α(110) in the main orientation direction and the crystallite size of α(110) in the orthogonal direction was 20 nm or less. |