Patent ID: 6524513
Filing Date: 2003-02-25
Classification: B01D,Y10S

Abstract:
The process for forming a membrane filter apparatus of unitary seated construction for carrying out tangential flow filtration which comprises:positioning within an injection mold a stack of (a) at least one module layer including at least one membrane filter and at least one first spacer layer and (b) at least one second spacer layer positioned adjacent each said at least one module layered; said stack having at least one feed port, at least one retentate port and at least one filtrate port, said at least one feed port and said at least one retentate port being in fluid communication with each other, each of said at least one filtrate port being sealed from fluid communication with both said at least one feed port and said at least one retentate port; said at least one module layer being sealed to form a perimeter seal about said at least one first spacer layer, and said at least one membrane filter and to form a first port seal which isolates said at least one filtrate port from said at least one feed port and said at least one retentate port, and injecting a molten polymeric composition into the said mold having the stack therein to provide a perimeter seal about the periphery of said at least one second spacer layer and said at least one module layer which seals said at least one feed port and said at least one retentate port from said at least one filtrate port and which permits fluid flow within the apparatus to introduce a feed into the apparatus and to remove a retentate and a filtrate from the apparatus.