NON-WOVEN DEPTH FILTER ELEMENT AND METHOD OF PRODUCING SAME

A new non-woven depth filter element is formed in a continuous process whereby a first cylindrical mass of very fine diameter polymer filaments overlaid by a second cylindrical mass of larger diameter polymer filaments are continuously accumulated on a spinning mandrel and advanced along and off of...

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Bibliographische Detailangaben
Hauptverfasser:	AUNE, THOMAS M, STIFTER, TRAVIS G, BOOTHROYD, DONALD A
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	BRAIDING COTTON-WOOL FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS,NON-WOVEN FABRICS KNITTING LACE-MAKING MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARYMATERIAL NON-WOVEN FABRICS PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL SEPARATION TEXTILES TRANSPORTING TRIMMINGS WADDING
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Beschreibung
Zusammenfassung:	A new non-woven depth filter element is formed in a continuous process whereby a first cylindrical mass of very fine diameter polymer filaments overlaid by a second cylindrical mass of larger diameter polymer filaments are continuously accumulated on a spinning mandrel and advanced along and off of the mandrel by a press roller. The first cylindrical mass is made of essentially continuous thermally bonded polymer filaments, having diameters of less than 1.5 microns. The first cylindrical mass comprises a first filament zone and a second filament zone. The first filament zone defines a calendered layer having a density of filaments that is substantially greater than that of the second zone. The calendered layer facilitates insertion of a core member