| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a filament composed of a sheath-core type composite fiber using a polylactic acid stereo complex in which mechanical properties, durability, and moisture heat stability are improved and which is excellent in heat resistance.SOLUTION: The filament contains: a core part composed of a resin composition containing a polylactic acid resin in which at least a part of carboxy group terminals of a polylactic acid block copolymer made up with a poly-L-lactic acid segment containing as a main component, L-lactic acid and a poly-D-lactic acid segment containing as a main component, D-lactic acid is blocked with 0.05 to 2 parts by mass of an isocyanurate compound, relative to 100 parts by mass of the polylactic acid block copolymer; and a sheath part composed of polyethylene terephthalate.</p> |
