Pitch-based high-modulus carbon fibers and method of producing same
AssigneesOsaka Gas Co., Ltd., Dainippon Ink and Chemicals, Inc.
InventorsEiji Tanigawa, Takemi Nakamura, Takayuki Mine
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Abstract
The present invention provides an improvement in the process of producing pitch-based carbon fibers comprising the steps of spinning a spinnable pitch, treating the resulting pitch fibers for rendering infusible, and carbonizing the same, the improvement comprises the step of removing the surface layer from the carbon fibers obtained in said process.
Claims7
In the process of producing optically anisotropic pitch-based carbon fibers which comprises spinning a spinnable pitch containing an optically anisotropic component, treating the resulting pitch fibers to render the fibers infusible, and carbonizing same, the improvement comprising producing carbon fibers having higher modulus than the carbon fibers obtained in said process by removing the surface layer of low modulus of elasticity from the carbon fibers obtained in the said process.
Dependencies are inferred from the claim text.