| abstract |
Gives bright and deep color development to polymethylpentene fibers that are excellent in lightness, or is excellent in lightness and has a high hole retention rate against uniformity of pore diameter and external force, woven and knitted fabrics, nonwoven fabrics, spun yarns, Provided are a polymethylpentene composite fiber and a polymethylpentene porous fiber that can be suitably used as a fiber structure such as stuffed cotton. It is a polymethylpentene composite fiber having a sea-island structure in which a sea component is a polymethylpentene resin and an island component is a thermoplastic resin. Further, the polymethylpentene porous fiber is made of a polymethylpentene resin and has a coefficient of variation CV of the pore diameter in the fiber cross section of 1 to 50%. |