公开(公告)号：EP2735575A4

公开(公告)日：2014-12-17

申请号：EP12817711

申请日：2012-07-20

申请人： MITSUBISHI RAYON CO

发明人： SHINMEN YUSUKE ,  HIROTA NORIFUMI ,  AOYAMA NAOKI ,  MATSUYAMA NAOMASA ,  NII TAKESHI ,  FUJII YASUYUKI ,  IRIE YOSHIKO ,  MATSUDA HARUMI

IPC分类号： C08F220/48 ,  C08F220/44 ,  D01F6/18 ,  D01F9/22

CPC分类号： D01F9/22 ,  C08F220/06 ,  C08F220/18 ,  C08F220/20 ,  C08F220/48 ,  C08F220/56 ,  D01F6/38 ,  D01F9/225 ,  Y10T428/2918 ,  C08F220/44

摘要： Provided are: a polyacrylonitrile-based precursor fiber for the production of a carbon fiber having a large single-fiber fineness, said precursor fiber ensuring high heat stability of a spinning dope and excellent productivity; and a copolymer suitable for the production of said precursor fiber. Also provided are: high-quality carbon fiber bundles which have a large single-fiber fineness and excellent productivity; a process for producing the same; and a process for producing flameproofed fiber bundles suitable for the production of the carbon fiber bundles. A polyacrylonitrile-based copolymer which comprises 93.0 to 99.4 mol% of acrylonitrile units, 0.5 to 4.0 mol% of (meth)acrylamide -based units, and 0.1 to 3.0 mol% of unsaturated carboxylic acid hydroxyalkyl ester units and in which the (meth)acrylamide-based units are (meth)acrylamide units and/or (meth)acrylamide derivative units having a molecular weight of 105 or less; a precursor fiber comprising the copolymer; a process for producing flameproofed fiber bundles which uses precursor fiber bundles consisting of the precursor fiber; carbon fiber bundles; and a process for production thereof.

公开(公告)号：EP2628827A4

公开(公告)日：2014-07-09

申请号：EP11832602

申请日：2011-10-13

申请人： MITSUBISHI RAYON CO

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

IPC分类号： D01F6/18 ,  C08J5/04 ,  D01D5/253 ,  D01F9/22

CPC分类号： D01F9/12 ,  B29C70/44 ,  B32B37/14 ,  C08J5/042 ,  C08J5/24 ,  C08J2363/00 ,  D01D5/096 ,  D01D5/253 ,  D01F6/38 ,  D01F9/225 ,  F27D7/00 ,  Y10T428/26 ,  Y10T428/298 ,  Y10T442/3089

摘要： 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)

公开(公告)号：EP2281847A4

公开(公告)日：2011-06-22

申请号：EP09754559

申请日：2009-05-12

申请人： MITSUBISHI RAYON CO

发明人： HIROTA NORIFUMI ,  SINMEN YUUSUKE ,  MATSUYAMA NAOMASA ,  NII TAKESHI ,  SHIBATANI HARUMI

IPC分类号： C08F220/44 ,  C08F4/40 ,  D01F6/18

CPC分类号： C08F4/40 ,  C08F220/06 ,  C08F220/38 ,  C08F220/44 ,  C08F220/56 ,  D01F6/38 ,  D01F9/22