FLAME-RETARDANT FIBER BUNDLE AND METHOD FOR MANUFACTURING CARBON FIBER BUNDLE

WIPO Patent Application WO/2019/146487

A1

The purpose of the present invention is to provide: a method for manufacturing a flame-retardant fiber bundle, which is for obtaining a high strength carbon fiber, by loosening the adhesion among monofilaments caused during flame-retarding treatment; and a method for manufacturing a carbon fiber bundle. To achieve the above, this method for manufacturing a flame-retardant fiber bundle satisfies prescribed conditions and includes a step for manufacturing the flame-retardant fiber bundle by means of flame retarding treatment of a polyacrylonitrile-based precursor fiber at 200 - 300°C in an oxidizing atmosphere, wherein a fiber bundle is caused to travel so as to sequentially pass between an nth roller and an (n + 1)th roller (n being an integer of at least 1 and no more than [m - 1]) in a roller group formed from m (m being an integer of 3 or greater) contiguously set rollers, the roller axes of the m continuously set rollers being parallel to each other and perpendicular to the direction of travel of the fiber bundle, the roller diameter being 5 -30 mm, and the specific gravity of the fiber bundle being 1.20 - 1.50.

NISHIKAWA YUKI (JP)
ITO TAKAHIRO (JP)
KAIKI HIROYUKI (JP)

PCT/JP2019/001228

August 01, 2019

January 17, 2019

Click for automatic bibliography generation  

TORAY INDUSTRIES (JP)

D01F9/22

JPH01118623A	1989-05-11
JP2008115481A	2008-05-22
JPH06264310A	1994-09-20
JPS5352735A	1978-05-13
JP2003055843A	2003-02-26
JPS61138739A	1986-06-26
JPH05287617A	1993-11-02
JP2013185285A	2013-09-19
JP2001131832A	2001-05-15
JP2006176909A	2006-07-06
JPS5836216A	1983-03-03

See also references of EP 3744878A4

View/Download PDF      PDF Help

Previous Patent: REINFORCING FIBER BUNDLE AND METHOD FOR MANUFACTURING SAME, AND CHOPPED FIBER BUNDLE AND FIBER-REINF...

Next Patent: DRIVING STATE MONITORING DEVICE, DRIVING STATE MONITORING METHOD, AND DRIVING STATE MONITORING SYSTE...