| 摘要 |
PURPOSE:To obtain the titled undrawn yarn having excellent dimensional stability and extremely improved heat deterioration resistance of mechanical characteristics, comprising a polyethylene terephthalate polyester component and a polyamide components and simultaneously satisfying specific conditions. CONSTITUTION:The aimed undrawn yarn which consists of a polyester component (preferably amorphous structure) comprising ethylene terephthalate as a main repeating unit and a polyamide component and simultaneously satisfies (A) 1-30wt.%, preferably 1.5-20wt.% polyamide component in the yarn, (B) <=3de, preferably <=2de single yarn fineness, (C) >=150% elongation and (D) >=15%, preferably >=30% silk factor retention ratio k (k is shown by the formula) when the yarn is heat-treated with dry heat at constant length at 230 deg.C for 10min. |
