| 摘要 |
PROBLEM TO BE SOLVED: To provide a punching device capable of manufacturing a perforated film which has high tensile strength in a width direction and a longitudinal direction, and hardly generates fracture.SOLUTION: A perforation device comprises a roll unit in which a first roll cutter, which is provided with a first linear cutting blade extending obliquely with respect to an axial direction and a circumferential direction of a first cylindrical body on the outer peripheral surface of the first cylindrical body, and a second roll cutter, which is provided with a second linear cutting blade extending obliquely with respect to an axial direction and a circumferential direction of a second cylindrical body on the outer peripheral surface of the first cylindrical body, are provided to face each other. The inclination direction of the first linear cutting blade with respect to the axial direction of the first cylindrical body and the inclination direction of the second linear cutting blade with respect to the axial direction of the second cylindrical body are the same.SELECTED DRAWING: Figure 2 |
