Umijima composite fiber, composite ultrafine fiber and textile products

摘要

In the sea-island composite fiber arranged so that island components are scattered in the sea component in the fiber cross section, the island component has a composite form formed by joining two or more different polymers, and the island A sea-island composite fiber in which the ratio L / D of the length L of the joint portion of the component to the composite island component diameter D is 0.1 to 10.0. Because it is a sea-island composite fiber with good high-order processability, high productivity and quality can be maintained with existing equipment, and the ultrafine fibers obtained by removing sea components have excellent tactile sensation and form control, etc. A sea-island composite fiber having the following functions is provided.