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1. 发明授权

US5472607A Hollow fiber semipermeable membrane of tubular braid 失效
标题翻译：中空纤维半透明管状编织膜
公开(公告)号：US5472607A
公开(公告)日：1995-12-05
申请号：US170033
申请日：1993-12-20
申请人： Mahendran Mailvaganam , Luigi Fabbricino , Carlos F. F. Rodrigues , Allen R. Donnelly
发明人： Mahendran Mailvaganam , Luigi Fabbricino , Carlos F. F. Rodrigues , Allen R. Donnelly
IPC分类号： B01D69/08 , B01D69/10 , D01D5/24 , B01D29/00 , B01D39/00
CPC分类号： D01D5/24 , B01D69/08 , B01D69/10
摘要： A hollow fiber membrane ("fiber") comprises a tubular macroporous support coated on its outer surface with a thin tubular asymmetric semipermeable film of polymer. The film, by itself, is non-self-supporting. The support itself is so flexible (flaccid) that it does not have a circular cross-section and collapses with finger pressure. Such a tube of knitted or woven braid no greater than 2.5 mm o.d., having interstitial voids which are non-uniformly shaped by the "ends" which are braided, is coated with a "dope" of polymer, then coagulated in a bath to form the film. Yet, after coating, the braided membrane can withstand up to 1500 psig in hydraulic compression forces before a straight-line relationship between flux and pressure begins to flatten out. The voids are relatively much larger than pores in the film. These voids are small enough to inhibit substantial penetration of the dope which lies superficially supported on the upper portion of the braid. Viewed in an elevational cross-sectional view looking down the longitudinal axis of the dope-coated braid, the dope extends over less than 33% of the outer portion of the braid's cross-sectional area. This thin coating of dope is made possible by a unique coating nozzle having sequential rounding and sizing orifices through which the braid is advanced by pulling it without unduly distorting the shapes of the voids in the braid. The shapes and sizes of the braid are thus retained except that the braid is distended into an essentially circular shape because of the tensile forces exerted by the coagulating dope. Hollow fiber membranes made as disclosed herein are used to make fluid-fluid separations, the braid and film being tailored to the purpose at hand.
摘要翻译：中空纤维膜（“纤维”）包括在其外表面上涂覆有薄的管状不对称半透膜聚合物的管状大孔载体。这部电影本身就是不自主的。支撑本身是如此柔软（松弛），它不具有圆形横截面，并且用手指压力塌陷。这种具有不大于2.5mm od的编织或编织编织物的管，其具有由编织的“端部”不均匀成形的间隙，涂覆有聚合物的“涂料”，然后在浴中凝结形成这个电影。然而，在涂层之后，在通量和压力之间的直线关系开始变平的情况下，编织膜能够承受高达1500psig的液压压缩力。空隙比膜中的孔相对大得多。这些空隙足够小以抑制表面上支撑在编织物上部的涂料的实质穿透。沿着俯视涂布编织物的纵向轴向的俯视横截面视图，涂料涂覆在编织物横截面积外部的33％以上。这种薄涂层可以通过具有顺序圆形和定径孔的独特的涂层喷嘴成为可能，编织物通过拉出而不会过度地扭曲编织物中的空隙的形状。因此，编织物的形状和尺寸被保留，除了由于凝固涂料施加的拉伸力而使编织物膨胀成基本上圆形的形状。使用如本文所公开的中空纤维膜用于制造流体 - 流体分离，编织物和薄膜根据目的而定制。

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