| 摘要 |
Disclosed is a core for winding a film including a structure in which the core is easily separated from the film while the film is wound on the outer circumference. The core for winding the film according to the present invention is formed with a cylinder shape. An inner space which is sealed by being limited by an outer wall and an inner wall is formed in the core, and the core for winding the film includes a tube in which a fluid injection unit enabling a fluid to be injected into the inner space is included. |
