Heat treating carbonaceous fiber having mesophase content

Details Heat treating carbonaceous fiber having mesophase content Heat treating carbonaceous fiber having mesophase content

D - Textiles, Paper

01

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18/6, 18/627

D01F 9/12 (2006.01) D01F 9/145 (2006.01) D01F 9/15 (2006.01) D01F 9/155 (2006.01)

Patent

CA 1055665

HEAT TREATING CARBONACEOUS FIBER HAVING MESOPHASE CONTENT ABSTRACT OF THE DISCLOSURE Fibers having a tensile strength of at least 30,000 psi. and a strain-to-failure of at least 5 per cent are produced by oxidizing fibers spun from a carbona- ceous pitch having a mesophase content of from 40 per cent by weight to 90 per cent by weight to an oxygen content of from 17 per cent by weight to 30 per cent by weight. Oxidation is effected by heating in an oxygen-containing atmosphere at a temperature of from 250°C. to 500°C. Because of their strength and handleability, these highly- oxidized fibers can be easily processed at high speeds by means of conventional yarn-transport systems, and readily woven or knit into cloth. Such cloth may then be heat treated to produce carbon or graphite cloth.

246837

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