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US 11,332,852 B2Granted
Carbon-fiber-precursor fiber bundle, carbon fiber bundle, and uses thereof
AssigneeMitsubishi Chemical Corporation
InventorsYuusuke Shinmen, Norifumi Hirota, Takeshi Nii
Life of this patent
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Abstract
A method of producing a carbon fiber bundle is provided, involving performing a flame-proof treatment to a carbon-fiber-precursor acryl fiber bundle having a single-fiber fineness of 1.5 dtex or more and 5.0 dtex or less, and having a roundness of 0.7 or more and 0.9 or less in a cross-section shape perpendicular to a fiber axis of the single fiber to obtain a flame-proofed fiber bundle; and performing a carbonization treatment to the flame-proofed fiber bundle.
Claims8
A method of producing a carbon fiber bundle, comprising:
- performing a flame-proof treatment to a carbon-fiber-precursor acryl fiber bundle having a single-fiber fineness of 1.5 dtex or more and 5.0 dtex or less, and having a roundness of 0.7 or more and 0.9 or less in a cross-section shape perpendicular to a fiber axis of the single fiber to obtain a flame-proofed fiber bundle;
- and
- performing a carbonization treatment to the flame-proofed fiber bundle.
Dependencies are inferred from the claim text.