发明申请
- 专利标题: Multifilament yarns and methods of making
- 专利标题(中): 多丝纱及其制作方法
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申请号: US09969275申请日: 2001-10-02
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公开(公告)号: US20020077448A1公开(公告)日: 2002-06-20
- 发明人: Attila Antal , Gaoyuan G. Chen , Dominick Egidio , Anthony Tiano , Edward Walker
- 主分类号: C08G063/00
- IPC分类号: C08G063/00 ; C08G067/00 ; C08G069/00
摘要:
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 98null 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.
公开/授权文献
- US06756000B2 Process of making multifilament yarn 公开/授权日:2004-06-29
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