公开(公告)号：US20130295811A1

公开(公告)日：2013-11-07

申请号：US13879278

申请日：2011-10-13

申请人： Yuusuke Shinmen ,  Norifumi Hirota ,  Atsushi Nakajima ,  Naoki Aoyama ,  Naomasa Matsuyama ,  Takeshi Nii ,  Akiyoshi Kogame ,  Yasuyuki Fujii ,  Yoshiko Irie ,  Harumi Matsuda ,  Takayuki Kiriyama ,  Teppei Miura ,  Takuya Teranishi ,  Shouhei Mori ,  Manabu Kaneko ,  Kiharu Numata ,  Masahiro Ichino ,  Shigekazu Takeda ,  Takayuki Kobayashi ,  Toshiyuki Itou ,  Masahiro Hata ,  Hiroyuki Nakao ,  Kenichi Watanabe

发明人： Yuusuke Shinmen ,  Norifumi Hirota ,  Atsushi Nakajima ,  Naoki Aoyama ,  Naomasa Matsuyama ,  Takeshi Nii ,  Akiyoshi Kogame ,  Yasuyuki Fujii ,  Yoshiko Irie ,  Harumi Matsuda ,  Takayuki Kiriyama ,  Teppei Miura ,  Takuya Teranishi ,  Shouhei Mori ,  Manabu Kaneko ,  Kiharu Numata ,  Masahiro Ichino ,  Shigekazu Takeda ,  Takayuki Kobayashi ,  Toshiyuki Itou ,  Masahiro Hata ,  Hiroyuki Nakao ,  Kenichi Watanabe

IPC分类号： D01F9/12 ,  B32B37/14 ,  F27D7/00

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/L2  (1)

摘要翻译： 提供：具有大的单纤维细度值和优异的生产率的碳纤维束，尽管如此，它在其中包含很少的交错单纤维并且具有优异的铺展性; 和适用于生产碳纤维束的前体纤维。 前体纤维是碳纤维前体丙烯酸纤维束，其包含包含95-99mol％丙烯腈单元和1-5mol％（甲基）丙烯酸羟烷基酯单元的聚丙烯腈共聚物，其单纤维细度为1.5-5.0 dtex 在丙烯酸​​系纤维束中，与纤维轴垂直的各单纤维的截面为圆度为0.9以下的形状。 圆度是使用公式（1）确定的值，其中S和L分别是通过用SEM检查单根纤维的横截面而获得的单根纤维的横截面面积和圆周长度 其垂直于纤维轴并分析所获得的图像。 圆度= 4pS / L2（1）