Patent ID: 7347937
Filing Date: 2008-03-25
Classification: B01D

Abstract:
1. A perfluorinated thermoplastic resin filtration cartridge comprising: a housing having an inlet and an outlet; and one or more membrane filters located between the inlet and the outlet; sealing means forming a liquid-tight seal between the one or more membrane filters and the outlet; such that an integral filtration device is formed, wherein all fluid must pass through the one or more membrane filters from the inlet to the outlet; wherein the seal and the one or more membrane filters are formed of perfluorinated thermoplastic resins, said membrane formed by thermally induced phase separation from perfluorinated thermoplastic resins, said resins being selected from the group consisting of poly(tetrafluoroethylene-co-perfluoro(alkylvinylether)), poly(tetrafluoroethylene-co-hexafluoropropylene)) and blends thereof; and wherein the sealing means has a melting point equal to or less than that of the membrane filter resins; wherein the membrane is a depth filter formed of one or more wound fibers.