Carbon-fiber-precursor fiber bundle, carbon fiber bundle, and uses thereof

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United States of America Patent

PATENT NO 11332852
APP PUB NO 20200263327A1
SERIAL NO

16860191

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Abstract

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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.

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Patent Owner(s)

Patent OwnerAddress
MITSUBISHI CHEMICAL CORPORATION1-1 MARUNOUCHI 1-CHOME CHIYODA-KU TOKYO 1008251 ?1008251

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Hirota, Norifumi Tokyo, JP 11 52
Nii, Takeshi Tokyo, JP 8 83
Shinmen, Yuusuke Tokyo, JP 4 25

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