Chopped carbon fibers and a production process thereof

摘要

Chopped carbon fibers comprise a set of pieces chopped from at least one fiber bundle and impregnated with a sizing agent. The fiber bundle pieces of the set have an average weight per unit length of 1.7 to 4 mg/mm in the fiber length direction and a coefficient of variation of 30 to 60% in the distribution of weights per unit length in the fiber length direction. The chopped carbon fibers can be used for molding a carbon fiber reinforced composite product.