Non-linear carbonaceous fiber

Abstract

The present invention resides in ignition resistant non-linear carbonaceous fiber or fiber tow having a reversible deflection ratio equal to or less than 1.2:1. The fibers have a multiplicity of crimps along their length with a crimp frequency on the order of from 6 to 15 crimps per inch. Fibers of the invention have improved elongatability of from about 2 to about 9%, a pseudo-elongatability of from about 0.2 to about 18%, and a tenacity without a loss of elongation on the order of at least 6 g/d. The carbonaceous fibers can be used, for example, as thermal insulation and/or fire resistant insulation in vehicles, building structures or clothing in furniture coverings, carpets, and the like, and can be blended with other fibers to form fine yarns.

Dependencies are inferred from the claim text.