CARBON FIBER BUNDLE, AND USES THEREOF

Provided are: a carbon fiber bundle which has a large value of single-fiber fineness and excellent productivity and which, despite this, contains few interlaced single fibers therein and has excellent spreadability; and precursor fibers which are suitable for use in producing the carbon fiber bundle...

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Main Authors NAKAJIMA, Atsushi, ITOU, Toshiyuki, MATSUDA, Harumi, KOGAME, Akiyoshi, HIROTA, Norifumi, KOBAYASHI, Takayuki, NAKAO, Hiroyuki, MIURA, Teppei, NUMATA, Kiharu, KIRIYAMA, Takayuki, FUJII, Yasuyuki, TERANISHI, Takuya, IRIE, Yoshiko, HATA, Masahiro, KANEKO, Manabu, TAKEDA, Shigekazu, NII, Takeshi, MATSUYAMA, Naomasa, AOYAMA, Naoki, WATANABE, Kenichi, SHINMEN, Yuusuke, ICHINO, Masahiro, MORI, Shouhei
Format Patent
LanguageEnglish
Hungarian
Published 28.04.2021
Subjects
AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G
APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBONFILAMENTS
CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS,THREADS, FIBRES, BRISTLES OR RIBBONS
CHEMISTRY
COMPOSITIONS BASED THEREON
GENERAL PROCESSES OF COMPOUNDING
METALLURGY
NATURAL OR ARTIFICIAL THREADS OR FIBRES
ORGANIC MACROMOLECULAR COMPOUNDS
SPINNING
TEXTILES
THEIR PREPARATION OR CHEMICAL WORKING-UP
WORKING-UP
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Summary:Provided are: a carbon fiber bundle which has a large value of single-fiber fineness and excellent productivity and which, despite this, contains few interlaced single fibers therein and has excellent spreadability; and precursor fibers which are suitable for use in producing the carbon fiber bundle. The precursor fibers are a carbon-fiber-precursor acrylic fiber bundle which comprises a polyacrylonitrile copolymer comprising 95-99 mol% acrylonitrile units and 1-5 mol% hydroxyalkyl (meth)acrylate units and which has a single-fiber fineness of 1.5-5.0 dtex. In the acrylic fiber bundle, the cross-section of each single fiber which is perpendicular to the fiber axis has a shape that has a roundness of 0.9 or less. The roundness is a value determined using equation (1) where S and L are the cross-sectional area and the circumferential length, respectively, of a single fiber which are obtained by examining, with an SEM, the cross-section of the single fiber which is perpendicular to the fiber axis and analyzing the obtained image. Roundness = 4pS/L 2 (1)
Bibliography:Application Number: HUE11832602