| 摘要 |
PROBLEM TO BE SOLVED: To provide an inexpensive composite material molding capable of easily exhausting the air incorporated between prepreg layers outside the system when prepregs are laminated to reduce voids by vacuum bag molding.SOLUTION: The invention provides a prepreg roll in which a prepreg sheet formed by impregnating a reinforced fiber sheet with a thermosetting matrix resin composition is wound in a roll state many times. An embossing film having unevenness and the prepreg sheet are alternately arranged, and in parts where projections of the embossing film are contacted with the prepreg sheet on both surfaces of the prepreg sheet, a total of the total area of projections on one surface of the embossing film and the total area of projections on the other surface of the embossing film is equal to or less than the product area of the prepreg sheet. |
