ACETATE CONJUGATE FIBER HAVING LATENT CRIMP AND MANUFACTURE THEREOF

摘要

PURPOSE:To obtain an acetate conjugate fiber having latent crimp, capable of exhibiting flexible soft touch and bulky feeling and at the same time having sufficient crimping characteristics. CONSTITUTION:A cellulose diacetate having an average acetate ratio of <56.2% and a cellulose triacetate having an average acetate ratio of 56.2-62.5% are subjected to side-by-side type conjugate spinning to obtain a precursor fiber having a single fiber fineness of 1.0-2.5 denier. The precursor fiber is subjected to saponification treatment with an alkali aqueous solution to obtain the objective latent crimp-having fiber which is composed of a cellulose acetate component or a cellulose component having an average acetate ratio of <48.8% and a cellulose triacetate component having an average acetate ratio of 56.2-62.5% each of which is attached to each other in a side-by-side state and has a single fiber fineness of 0.8-2.0 denier, bulkiness of >=22.0cm<3>/g and shrinkage of >=30%.