| 摘要 |
PURPOSE:To increase density and strength by subjecting prepreg obtd. by impregnating or coating carbon fibers with a specified matrix binder to laminating and hot press molding, curing the binder and carbonizing the cured binder by calcining. CONSTITUTION:Carbon black having >=50nm particle size and <=100ml/100g DBP oil absorption is uniformly dispersed in an org. solvent such as acetone or ethanol by <=10wt.% under ultrasonic vibration, a precondensate of thermosetting resin such as liq. phenol resin is added by 100-400 pts.wt. per 100 pts.wt. org. solvent and they are mixed to obtain a liq. matrix binder. Carbon fibers are impregnated or coated with the binder and the binder is half cured. The resulting prepreg is subjected to laminating and hot press molding, the binder is cured by heating and the cured binder is carbonized by calcining in a nonoxidizing atmosphere. |
