| 摘要 |
PROBLEM TO BE SOLVED: To solve a problem involved in heretofore disclosed methods for accelerating removal of a solvent from acrylic fiber bundles, that when a volume of a coagulated fiber bundle is large, a large amount of showering liquid is required to decrease the solvent in the material to be washed to a specified concentration and, as a result, the amount of a washing liquid to be removed in a washing tank increases, and a solvent reduction effect which should fundamentally be exhibited becomes unnoticeable in the washing tank.SOLUTION: The problem can be solved by making an efficient solvent reduction effect exhibited by providing undrawn coagulated fiber bundles drawn up from a coagulation bath with a washing liquid at a specified temperature and pressure and by a specified method.SELECTED DRAWING: Figure 1 |
