| 摘要 |
A stampable sheet comprising discontinuous carbon fibers and a thermoplastic matrix resin, the stampable sheet characterized in that the viscosity &eegr; of the stampable sheet in a state in which the matrix resin in the stampable sheet is molten is in the range of &eegr;0 ≤&eegr; < &eegr;0exp (0.20 Vf) (Pa·s), and the ratio Z of opened carbon fiber bundles (A) in which Mn/(Ln × D) is less than 8.5×10-1 (mg/mm2) with respect to the total weight of carbon fibers is in the range of 10 ≤ Z < 70 (wt%). Here, &eegr; is the viscosity at a temperature 50°C higher than the solidification start temperature of the matrix resin, Vf is the carbon fiber content (%) per unit volume of the stampable sheet, &eegr;0 is the viscosity of the matrix resin, Mn is the weight of a carbon fiber bundle, Ln is the fiber length of the carbon fibers, and D is the diameter of the carbon fibers. This configuration makes it possible to provide a stampable sheet provided with the optimum range of conditions, and to achieve both high fluidity during molding and high mechanical characteristics after molding. |
