| 摘要 |
<p>PROBLEM TO BE SOLVED: To easily perform the taking-up of a film and a sheet material.SOLUTION: Provided is a taking-up core 1 having a hollow cylindrical shape and made of at least two layers of an external layer 2a and an internal layer 2b located on the inner circumferential side thereof and softer than the external layer 2a. The external layer 2a is formed by winding a first prepreg sheet 4a obtained by impregnating the first base material as a paper base material with a thermosetting resin such as a phenolic resin sheet, and the internal layer 2b is formed by simultaneously winding the one impregnated with a small amount of thermosetting resin into the second base material as a cloth base material softer than the first base material or the second prepreg sheet 4b non-impregnated with a thermosetting resin and the first prepreg sheet 4a. The inner circumferential side of the internal layer 2b may be provided with the innermost layer 2c harder than the internal layer 2b.The innermost layer 2c can be formed, e.g., by winding the first prepreg sheet 4a used for the external layer 2a or a prepreg sheet similar thereto.</p> |
