CARBON-FIBER-PRECURSOR FIBER BUNDLE, CARBON FIBER BUNDLE, AND USES THEREOF

Title:

CARBON-FIBER-PRECURSOR FIBER BUNDLE, CARBON FIBER BUNDLE, AND USES THEREOF

Document Type and Number:

WIPO Patent Application WO/2012/050171

Kind Code:

A1

Abstract:

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 = 4πS/L2 (1)

Inventors:

SHINMEN YUUSUKE (JP)
HIROTA NORIFUMI (JP)
NAKAJIMA ATSUSHI (JP)
AOYAMA NAOKI (JP)
MATSUYAMA NAOMASA (JP)
NII TAKESHI (JP)
KOGAME AKIYOSHI (JP)
FUJII YASUYUKI (JP)
IRIE YOSHIKO (JP)
MATSUDA HARUMI (JP)
KIRIYAMA TAKAYUKI (JP)
MIURA TEPPEI (JP)
TERANISHI TAKUYA (JP)
MORI SHOUHEI (JP)
KANEKO MANABU (JP)
NUMATA KIHARU (JP)
ICHINO MASAHIRO (JP)
TAKEDA SHIGEKAZU (JP)
KOBAYASHI TAKAYUKI (JP)
ITOU TOSHIYUKI (JP)
HATA MASAHIRO (JP)
NAKAO HIROYUKI (JP)
WATANABE KENICHI (JP)

Application Number:

PCT/JP2011/073578

Publication Date:

April 19, 2012

Filing Date:

October 13, 2011

Export Citation:

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Assignee:

MITSUBISHI RAYON CO (JP)
SHINMEN YUUSUKE (JP)
HIROTA NORIFUMI (JP)
NAKAJIMA ATSUSHI (JP)
AOYAMA NAOKI (JP)
MATSUYAMA NAOMASA (JP)
NII TAKESHI (JP)
KOGAME AKIYOSHI (JP)
FUJII YASUYUKI (JP)
IRIE YOSHIKO (JP)
MATSUDA HARUMI (JP)
KIRIYAMA TAKAYUKI (JP)
MIURA TEPPEI (JP)
TERANISHI TAKUYA (JP)
MORI SHOUHEI (JP)
KANEKO MANABU (JP)
NUMATA KIHARU (JP)
ICHINO MASAHIRO (JP)
TAKEDA SHIGEKAZU (JP)
KOBAYASHI TAKAYUKI (JP)
ITOU TOSHIYUKI (JP)
HATA MASAHIRO (JP)
NAKAO HIROYUKI (JP)
WATANABE KENICHI (JP)

International Classes:

D01F6/18; D01F9/22

Foreign References:

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JP2535448B2	1996-09-18
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JPH01132832A	1989-05-25
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Other References: