Balanced ultra-high modulus and high tensile strength carbon...

Details Balanced ultra-high modulus and high tensile strength carbon... Balanced ultra-high modulus and high tensile strength carbon...

D - Textiles, Paper

01

F

18/6

D01F 9/14 (2006.01) D01F 9/145 (2006.01)

Patent

CA 1324468

TITLE BALANCED ULTRA-HIGH MODULUS AND HIGH TENSILE STRENGTH CARBON FIBERS ABSTRACT OF THE DISCLOSURE Carbon fibers having balanced properties comprising an ultra-high modulus greater than 100 Mpsi and a high tensile strength of greater that 500 kpsi. The carbon fibers are derived from a solvent fractionated pitch having a mesophase content of greater than 90% by weight and a quinoline insolubles content of less than 1% by weight. A crude pitch feed is sequentially heat soaked, solvent fractionated, and extruded to form as-spun fibers. The latter are stabilized or infusibilized and then carbonized by multistage heat treatments involving separate precarbonization, carbonization, and graphitization steps with an intermediate cooling step.

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