Carbonaceous fibers with spring-like reversible deflection and method of manufacture
AssigneeThe Dow Chemical Company
InventorsFrancis P. McCullough, Jr., David M. Hall
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Abstract
The invention provides a non-flammable non-linear elongatable carbonaceous fiber having a reversible deflection of greater than 1.2:1 and an aspect ratio of greater than 10:1 which may be formed into a resilient structure and the method of preparing said fiber.
Claims27
A non-flammable non-linear resilient permanently heat set elongatable carbonaceous fiber having a reversible deflection ratio of greater than 1.2:1 and an aspect ratio greater than 10:1.
A non-linear elongatable structure derived from an oxidation stabilized fiber precursor material, said precursor fiber being capable of producing on heat treatment of fiber having a diameter of from 4 to 20 microns, said structure also have a reversible deflection of greater than about 1.2:1 and an aspect ratio of greater than 10:1.
A method of forming a non-flammable non-linear carbonized fiber with reversible deflection, comprising the steps of spinning a fiber from a carbonaceous precursor material, stabilizing the precursor fiber by oxidation at a temperature of from 200 degrees to 250 degrees C., imparting a coil-like or sinusoidal configuration to the stabilized fiber, and thereafter heating the fiber in a relaxed condition in a non-oxidizing atmosphere to a temperature of from 150 degrees to about 1500 degrees C to impart a set coil-like or sinusoidal configuration to the fiber.
Dependencies are inferred from the claim text.