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

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United States of America Patent

PATENT NO 10662556
APP PUB NO 20190153628A1
SERIAL NO

16258830

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Abstract

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A carbon fiber bundle, wherein an average single-fiber fineness is from 1.0 to 2.4 dtex and a roundness is from 0.7 to 0.9 in a shape of a cross-section perpendicular to a fiber axis of a single fiber; the roundness being determined with equation (1): roundness=4πS/L2, where S is a cross-sectional area of the single fiber and L is a circumferential length of the single fiber, and S and L are obtained by observing, under an SEM, the cross-section of the single fiber perpendicular to the fiber axis of the single fiber and analyzing the obtained image.

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Patent Owner(s)

Patent OwnerAddress
MITSUBISHI CHEMICAL CORPORATIONCHIYODA-KU TOKYO 100-8251

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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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