公开(公告)号：WO1998023355A1

公开(公告)日：1998-06-04

申请号：PCT/US1997021196

申请日：1997-11-12

Applicant: ISP INVESTMENTS INC.

Inventor： ISP INVESTMENTS INC. ,  GERSHENSON, Moshe ,  ELLIOTT, Robert, S. ,  PEARSON, John ,  MALAWER, Edward, G.

IPC: B01D29/11

CPC classification number: B01D63/00 ,  B01D25/24 ,  B01D29/23 ,  B01D29/27 ,  B01D29/58 ,  B01D39/083 ,  B01D2239/065 ,  B01D2239/0654 ,  B01D2239/0677 ,  B01D2239/1216

Abstract: A prefilter bag (3) for insertion into a standard filtration bag apparatus (20), having a filtration assembly comprising a seamless filter membrane (10) having uniform pore openings preselected within the range of between about 2 and about 50 microns ( mu ) and a linearly channeled, nondeformable, semi-rigid liquid transport thermoplastic sheet (8) in the form of a molded webbing or netting in contact with the upper surface of the filter membrane (10); said webbing (8) having marginal edges (18) which are coextensive with those of the membrane (10); 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 (22) adapted to be inserted in, attached to or sealed to an outer, retaining ring (24) of a non-wrapped filter bag. The invention also pertains to a method for the fabrication and use of the present filtration bag.

Abstract translation: 一种用于插入到标准过滤袋装置（20）中的预过滤袋（3），其具有过滤组件，该过滤组件包括预定在约2至约50微米（μ）范围内的均匀孔隙的无缝过滤膜（10）和 以与过滤膜（10）的上表面接触的模制织带或网的形式的线性通道，不可变形的半刚性液体输送热塑性片材（8）; 所述带状物（8）具有与所述膜（10）共同延伸的边缘（18）; 所述组件适于通过将组件连续卷绕在其自身上而成形，以围绕管状心轴2至5个完整的卷绕，以便形成圆柱形管或锥体; 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，密封到适于被插入或密封到外部保持环的保持环（22） 24）的非包装过滤袋。 本发明还涉及一种用于制造和使用本发明的过滤袋的方法。

公开(公告)号：EP0949950A1

公开(公告)日：1999-10-20

申请号：EP97946949.0

申请日：1997-11-12

Applicant: ISP INVESTMENTS INC.

Inventor： GERSHENSON, Moshe ,  ELLIOTT, Robert, S. ,  PEARSON, John ,  MALAWER, Edward, G.

IPC: B01D25 ,  B01D29 ,  B01D39 ,  B01D63

CPC classification number: B01D63/00 ,  B01D25/24 ,  B01D29/23 ,  B01D29/27 ,  B01D29/58 ,  B01D39/083 ,  B01D2239/065 ,  B01D2239/0654 ,  B01D2239/0677 ,  B01D2239/1216

Abstract: 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.