| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide prepreg which is good in impregnation of matrix resin compositions, shows high flowability of a matrix resin during molding and provides a composite material excellent in mechanical characteristics with high productivity by suppressing deterioration of the strength of a molding due to increase of the thickness of the molding.SOLUTION: Prepreg is formed by impregnating, with a thermosetting matrix resin composition, a reinforcing fiber substrate consisting of a sheet in which a plurality of tow-like carbon fiber yarns composed of a carbon fiber of a single fiber fineness of 1.2-2.4 dtex are arranged in parallel with one another and an auxiliary yarn arranged on one or both sides of the sheet at an angle different from that of the carbon fiber yarn or a reinforcing fiber stitch yarn substrate in which a plurality of such sheets are laminated in orientation directions of the individual sheets at different angles and integrated with a stitch yarn.</p> |
