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    • 4. 发明申请
    • METHODS OF MAKING STRETCHED FILTERING MEMBRANES AND MEMBRANE MODULES
    • 制造薄膜过滤膜和膜模块的方法
    • WO2003053553A1
    • 2003-07-03
    • PCT/CA2002/001881
    • 2002-12-09
    • ZENON ENVIRONMENTAL INC.COTE, PierrePEDERSEN, Steven
    • COTE, PierrePEDERSEN, Steven
    • B01D67/00
    • D01D5/24B01D63/021B01D63/022B01D63/024B01D67/0027B01D69/02B01D69/08B01D2323/50B01D2325/022B29C55/06B29K2105/04
    • A method for stretching a hollow fibre while making a stretched filtering membrane from a precursor involves wrapping the hollow fibre around a structure and modifying the structure such that at least portions of the hollow fibre are forced to elongated. For example, the hollow fibre may be wrapped around two or more supports and the distance between adjacent supports increased. This produces first portions of the hollow fibre stretched to a first elongation and porous to a first porosity and second portions of the hollow fibre that are not stretched or are stretched to a second elongation less than the first elongation and that remain non-porous or become porous to a second porosity which is less than the first porosity. The membrane may be made into a module with second portions of the membranes located at points where the membranes exit the potting material or at turns in loops of the fibres, if any. In various embodiments, the fibre is potted into modules before or after it is stretched. Some methods of potting involve applying a hot melt adhesive to the second portions. Some embodiments are made entirely of thermoplastic material and can be easily recycled.
    • 在从前体制造拉伸的过滤膜的同时拉伸中空纤维的方法涉及将中空纤维缠绕在结构上,并且改变结构,使得中空纤维的至少一部分被迫伸长。 例如,中空纤维可以缠绕在两个或更多个支撑件上,并且相邻支撑件之间的距离增加。 这产生中空纤维的第一部分被拉伸到第一伸长率并且多孔到第一孔隙率和中空纤维的第二部分,其不被拉伸或被拉伸至小于第一伸长率的第二伸长并且保持无孔或成为 多孔至小于第一孔隙度的第二孔隙率。 膜可以制成模块,其中膜的第二部分位于膜离开灌封材料的位置处,或者如果有的话在纤维的环中。 在各种实施例中,纤维在其被拉伸之前或之后被封装成模块。 一些灌封方法涉及将热熔粘合剂应用于第二部分。 一些实施方案完全由热塑性材料制成并且可以容易地再循环。