| 摘要 |
PROBLEM TO BE SOLVED: To produce a cellulose acetate conjugated fiber, having a touch feeling with extreme wetness, excellent in smoothness and suitable as a material, etc., for clothes by using respective specific spinning solutions for a core and a sheath components, carrying out the dry spinning under specified conditions and performing the saponification treatment of the resultant fiber with an alkali. SOLUTION: This cellulose acetate conjugated fiber is obtained by dissolving cellulose triacetate having 56.2-62.5% average acetyl content in an organic solvent, using the resultant spinning solution as a core component, dissolving cellulose diacetate having 48.8-56.2% average acetyl content in an organic solvent, using the prepared spinning solution as a sheath component, delaying the volatilizing and drying rates of the solvent in the spinning solutions, carrying out the dry spinning of the solutions into a core-sheath type and performing the saponification treatment of the obtained conjugated fiber with an alkali. Furthermore, the dry spinning is preferably carried out under conditions of <=60 deg.C spinning solution temperature and >=380m/min discharge linear velocity to provide the core-sheath type. |
