| 摘要 |
PROBLEM TO BE SOLVED: To provide a can roll capable of preventing generation of wrinkles of a film.SOLUTION: In a cylinder section 11 having an outer peripheral surface 11s around which a long resin film is wound, plural gas introduction passages 15 parallel to a center axis O thereof are bored at regular intervals across an entire circumference thereof. Each gas introduction passage 15 extends with a length of 50% or more relative to the width of the outer peripheral surface 11s, and communicate with two or more rows of gas discharge hole groups 16a, 16b opened on the outer peripheral surface 11s side in line at regular intervals in an extending direction of the passage. In any of the two or more rows of the gas discharge hole groups, each gas discharge hole constituting the gas discharge hole group extends on a plane orthogonal to the center axis O. Also, an angle formed between a line L1 parallel to a direction in which the gas discharge holes extend on the plane, and a normal line L2 of the outer peripheral surface immediately near the gas introduction passage 15 communicating with the gas discharge hole is 60° or less. |
