| 摘要 |
PURPOSE:To provide a good package form even for a large package, stably deliver yarns and prevent the occurrence of fluff or yarn breakage in a carbonization step, by applying a specific amount of a special composition to yarns after flameproofing treatment and winding up the resultant yarns. CONSTITUTION:The following composition in an amount of 0.2-5wt% is applied to flameproofed fiber yarns (oxidized fiber yarns) obtained by heating a fibrous precursor in an oxidizing atmosphere and the resultant yarns are wound up into a package, which is then transferred to a carbonization step (graphitization step). The flameproofed fiber yarns delivered from the package are then heat- treated at a high temperature. The composition contains ethylene oxide adduct of butanediol and/or trimethylolpropane ethylene oxide adduct with an amount of added ethylene oxide within the range of 5-15 as an essential component. |
