HOLLOW FIBRES

Elongate hollow fibre polymeric membranes having an outer surface, a plurality of pores and a pore size gradient increasing radially inwardly such that the pores form a substantially hollow passage in the fibre are disclosed. The hollow fiber membranes are made by mixing a liquid lumen forming agent...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	DANIEL MULLETTE, JEROME, F. DITTER, HEINZ-JOACHIM MULLER
Format:	Patent
Sprache:	eng
Schlagworte:	AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G CHEMISTRY COMPOSITIONS BASED THEREON GENERAL PROCESSES OF COMPOUNDING MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OFARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES ORRIBBONS METALLURGY NATURAL OR ARTIFICIAL THREADS OR FIBRES ORGANIC MACROMOLECULAR COMPOUNDS PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL SEPARATION SPINNING TEXTILES THEIR PREPARATION OR CHEMICAL WORKING-UP TRANSPORTING WORKING-UP
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Beschreibung
Zusammenfassung:	Elongate hollow fibre polymeric membranes having an outer surface, a plurality of pores and a pore size gradient increasing radially inwardly such that the pores form a substantially hollow passage in the fibre are disclosed. The hollow fiber membranes are made by mixing a liquid lumen forming agent with a polymer dope, and then contacting the dope with a quench fluid for a time sufficient for the dope to solidify, wherein the quench fluid is contacted only at an outer surface of the dope corresponding with an outer surface on the hollow fibre.