摘要 |
PURPOSE:To obtain a prepreg consisting of a specific organic synthetic fiber and a specific inorganic fiber contained in a specific portion and a resin composition, capable of substituting with a metal and having excellent stiffness, impact resistance and penetration impact resistance and useful for helmet, etc. CONSTITUTION:The objective prepreg and fiber reinforced plastic consist of a reinforcing material obtained by mixing (A) an organic synthetic fiber having 80-600kg/mm<2> tensile strength of single filament, and 4000-8000kg/mm<2> tensile modulus of single filament with (B) an inorganic fiber which is a polyacrylonitrile based carbon fiber in a weight ratio of (10/90) to (90/10) and having 10-80% volume content of both fibers and (C) a resin composition composed of an unsaturated polyester resin, etc. |