| 摘要 |
PROBLEM TO BE SOLVED: To obtain a prepreg having good tack with little deterioration with the lapse of time, and capable of giving a fiber-reinforced composite material excellent in compressive interlaminer shear strength(CILS) and a cross laminate compressive strength(LCS) at a high temperature after moisture absorption while keeping its impact resistance. SOLUTION: This prepreg is produced by impregnating a resin satisfying a requirement (B) in carbon fiber satisfying a requirement (A). In this prepreg, particles satisfying a requirement (C) exist not more than 20%, and they are distributed on the surface in higher concentration than inside the prepreg. Requirement (A): Carbon fiber with a tensile strength not less than 4,400MPa consisting of continuous fiber having a hook-drop value not less than 10cm. Requirement (B): A base resin consisting mainly of a thermosetting resin. Requirement (C): Particles with each size not more than 150μm consisting of a thermoplastic resin.
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