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    • 65. 发明公开
    • FILTER BAG AND PROCESS OF MANUFACTURE
    • FILTERBEUTEL UND VERFAHREN ZUR HERSTELLUNG
    • EP0949950A4
    • 1999-12-22
    • EP97946949
    • 1997-11-12
    • ISP INVESTMENTS INC
    • GERSHENSON MOSHEELLIOTT ROBERT SPEARSON JOHNMALAWER EDWARD G
    • B01D25/24B01D29/23B01D39/08B01D63/00B01D29/11
    • B01D63/00B01D25/24B01D29/23B01D29/27B01D29/58B01D39/083B01D2239/065B01D2239/0654B01D2239/0677B01D2239/1216
    • A prefilter bag for insertion into a standard filtration bag apparatus, having a filtration assembly comprising a seamless filter membrane having uniform pore openings preselected within the range of between about 2 and about 50 microns ( mu ) and a linearly channeled, non-deformable, semi-rigid liquid transport thermoplastic sheet in the form of a molded webbing or netting in contact with the upper surface of the filter membrane; said webbing having marginal edges which are coextensive with those of the membrane; said assembly adapted to be shaped by continuous winding of the assembly upon itself for 2 to 5 complete convolutions around a tubular mandrel so as to form a cylindrical tube or cone; the bottom of said cylinder being sealed to prevent liquid leakage and the top of said cylinder, forming a liquid inlet opening, being sealed to a retaining ring adapted to be inserted in, attached to or sealed to an outer, retaining ring of a non-wrapped filter bag. The inlet of the wrapped cylindrical bag is optionally fitted with vortex directing means to enhance a linearly tangential direction of the entering liquid against the walls of the inside membrane. The invention also pertains to a method for the fabrication and use of the present filtration bag.
    • 一种用于插入标准过滤袋装置(20)中的预过滤袋(3),该预过滤袋具有过滤组件,所述过滤组件包括具有预选在约2至约50微米(v)范围内的均匀孔口的无缝过滤膜(10)和 与过滤膜(10)的上表面接触的呈模制织带或网状形式的线性通道,不可变形,半刚性液体传输热塑性片材(8); 所述织带(8)具有与所述膜(10)的边缘共同延伸的边缘(18); 所述组件适于通过将组件自身连续缠绕在管状心轴周围2至5次完整的卷绕以形成圆柱形管或锥体而成形; 所述气缸的底部被密封以防止液体泄漏并且所述气缸的顶部形成液体入口开口,所述液体入口开口被密封到保持环(22),所述保持环适于插入,附接到或密封到外部保持环( 24)的一个无包装的过滤袋。 本发明还涉及用于制造和使用本过滤袋的方法。