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    • 3. 发明授权
    • Process of making multifilament yarn
    • 复丝纱的制作工艺
    • US06756000B2
    • 2004-06-29
    • US09969275
    • 2001-10-02
    • Attila AntalGaoyuan G. ChenDominick EgidioAnthony TianoEdward Walker
    • Attila AntalGaoyuan G. ChenDominick EgidioAnthony TianoEdward Walker
    • D01D508
    • A61L17/12D01F6/84
    • The present invention is directed to processes for the manufacture of multifilament yarn, including the steps of extruding multifilaments of a polymer containing at least mole 85 percent L-lactide and not more than 15 mole percent glycolide, spinning the extruded multifilaments to form a spun yarn, passing the spun multifilament yarn through an orientation roll heated at a temperature of less than 98° C. and drawing the spun multifilament yarn to a draw ratio of at least 4:1 to form an oriented multifilament fiber, annealing the oriented multifilament yarn at a temperature greater than that of the orientation roll, and redrawing the annealed, oriented multifilament yarn by at least 10 percent at a temperature lower than the temperature of annealing.
    • 本发明涉及多丝纱线的制造方法,包括以下步骤:挤出含有至少85%的L-丙交酯和不超过15摩尔%乙交酯的聚合物的复丝,将挤出的复丝纺丝以形成短纤纱 将纺丝复丝纱线通过在低于98℃的温度下加热的定向辊,并将纺丝复丝纱线拉伸至至少4:1的拉伸比,以形成定向复丝纤维,将定向复丝纱线退火 温度大于取向辊的温度,并且在低于退火温度的温度下将退火的定向复丝纱线重新拉伸至少10%。