| 摘要 |
PROBLEM TO BE SOLVED: To provide polymer alloy fibers which exhibits a good color-developing property, even after processed into porous fibers, can give an ultra fine yarn having small single fiber fineness irregularity, and can maintain good shape stability and dynamic characteristics. SOLUTION: This blended yarn is characterized by blending the following fibers A or fibers B with the fibers C different from the fibers A and B. The fibers A : polymer alloy fibers which each exhibits a sea-island structure comprising a slightly soluble polymer and an easily soluble polymer, has an easily soluble polymer blend ratio of 10 to 90 wt.%, and has coarse islands having diameters of≥200 nm in an area ratio of≤3% based on the total area of the islands. The fibers B : polymer alloy fibers which each comprises a slightly soluble polymer and an easily soluble polymer, has an easily soluble polymer blend ratio of 10 to 90 wt.%, and has a portion showing a laminar structure comprising the polymers in an amount of≥50% based on the total area of the fiber cross section. The fibers C : fibers comprising a polymer having a lower solubility than that of the easily soluble polymer. COPYRIGHT: (C)2005,JPO&NCIPI
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