Kohlenstoffasern mit nichtrundem Querschnitt, Verfahren zu deren Herstellung und damit hergestellter Verbundwerkstoff

摘要

A noncircular cross-section carbon fiber having at least one plane of symmetry passing the centroid and having an angle of rotational symmetry, theta , defined by theta = 360 DEG /n, in which n is an integer of 1 to 10; wherein the internal structure has no lamellar structure having a substantially uniform crystalline structure; and wherein the fiber surface has a suface smoothness S of 1.16 or below and the tensile strength and the tensile modulus of the fiber in the form of a resin-impregnated strand is 300 kg/mm<2> or above and 20 ton/mm<2> or above, respectively; a process for producing such carbon fiber; and a composite of such carbon fiber with a resin.