| 摘要 |
PROBLEM TO BE SOLVED: To provide a hollow fiber having porous hollow part excellent in dye-affinity, lightness, feeling of dryness, puffy feeling, or the like, without damaging lightness, strength, chemical resistance which are the characteristics of polyolefins such as polyethylene, polypropylene and to provide a fibrous structure including the hollow fiber. SOLUTION: The hollow fiber is obtained by forming the fibrous structure comprising a sea-island type conjugate fiber including a polyolefin composition including a polymer block (A) mainly comprising an olefin based monomer unit and a polymer block (B) mainly comprising (meth)acrylate monomer unit as a sea component, and a water soluble thermoplastic polyvinyl alcohol based polymer as an island component, and treating the fibrous structure with water to dissolve and remove the water soluble thermoplastic polyvinyl alcohol based polymer from the conjugate fiber to obtain the hollow fiber comprising the polyolefin composition.
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