| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a modified cross-section polyester core-sheath conjugate fiber that has good spinnability and processability, and has an excellent thermal insulation property especially when made into a fabric. <P>SOLUTION: The modified cross-section polyester core-sheath conjugate fiber includes a polymer (A) constituting a sheath portion and a polymer (B) constituting a core portion at a mass ratio (A/B) of 80/20 to 10/90. The polymer (A) is a polyester-based resin and the polymer (B) is a polyester-based resin including 1-20 mass% of silica which has an average secondary particle diameter of 0.05-3.0 μm and 10 vol.% or less of which has a secondary particle diameter of 5 μm or more. A single fiber constituting the modified cross-section core-sheath conjugate fiber has a multi-lobar cross-sectional shape having three to six projection parts a and b. The cross-sectional shape of the single fiber is substantially the same as the cross-sectional shape of the core portion. The single fiber constituting the modified cross-section core-sheath conjugate fiber has a fineness of 1.5 dtex or less. <P>COPYRIGHT: (C)2013,JPO&INPIT |
