| 摘要 |
PROBLEM TO BE SOLVED: To provide a polytrimethylene terephthalate ultra fine yarn which can give high density woven or knitted fabrics having soft touch, fine touch and colorability that have been achieved by conventional techniques, can be produced in excellent productivity, and gives waste liquids giving small environmental loads, after treated with an alkali. SOLUTION: The ultra fine yarn comprising a yarn substantially composed from polytrimethylene terephthalate is characterized in that a dry heat shrinkage rate (TWA) after an alkali reduction and a single fiber fineness (FDT) after an alkali reduction satisfy all of expression (1): 5≤TWA(%)≤20, and expression (2): 0.01≤FDT(dtex)≤1. COPYRIGHT: (C)2006,JPO&NCIPI |
