| 摘要 |
PROBLEM TO BE SOLVED: To provide a dope-dyed polylactic acid false-twisted yarn excellent in bulkiness, abrasion resistance and stretchability with high toughness. SOLUTION: The dope-dyed polylactic acid false-twisted yarn comprises a polylactic acid crimped yarn comprising monofilaments having an almost circular or circular cross-sectional shape, containing 0.01-3 mass% colorant and having 2.8-3.8 relative viscosity and is prepared by twisting the polylactic acid crimped yarn having 1.75-3.5 cN/dtex strength, 35-60% elongation, 500-2000 dtex total fineness, 1.5-20 dtex monofilament fineness, 2-8% shrinkage in hot water and 5-20% crimpability. The polylactic acid false twisted yarn has 1.5-2.65 cN/dtex strength, 25-50% elongation, 4-12% shrinkage in boiling water and 20-50% dry heat percentage crimp. COPYRIGHT: (C)2008,JPO&INPIT
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