| 摘要 |
PROBLEM TO BE SOLVED: To provide a hollow fiber having a porous follow part and a fiber structure containing the fiber which excel in lightness, preventability of being transparent, a puffy feeling, a soft feeling, etc. SOLUTION: This hollow fiber is produced by treating the fiber structure containing a sea-island type conjugated fiber comprising a thermoplastic polymer having >2% equilibrium moisture content as the sea component and a water-soluble thermoplastic polyvinyl alcohol-based polymer as the island component with water and removing at least a part of the water-soluble thermoplastic polyvinyl alcohol-based polymer from the conjugated fiber by dissolving. |
