FIBER SPINNING PROCESS AND PRODUCT THEREOF

A significant increase in the rate of production of high quality symmetrical microporous hollow fibers can be obtained by a selection of raw materials, equipement and processing conditions. In particular, selection of polymer concentrates, precipitating solutions and fiber die dimensions are importa...

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Bibliographische Detailangaben
Hauptverfasser:	WENTHOLD, RANDAL, M, COSENTINO, LOUIS, C, PIGOTT, DANIEL, T, HALL, ROBERT, T., II, REGGIN, ROBERT, F
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBONFILAMENTS CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS,THREADS, FIBRES, BRISTLES OR RIBBONS MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OFARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES ORRIBBONS NATURAL OR ARTIFICIAL THREADS OR FIBRES PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL SEPARATION SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS SPINNING TEXTILES TRANSPORTING WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Beschreibung
Zusammenfassung:	A significant increase in the rate of production of high quality symmetrical microporous hollow fibers can be obtained by a selection of raw materials, equipement and processing conditions. In particular, selection of polymer concentrates, precipitating solutions and fiber die dimensions are important to attaining production speeds greater than 30 meters per minute. In the processes, a polymer dope solution (12) is filtered through a filter press (16) and delivered to a dry-jet wet spinning spinneret apparatus (20) along with a precipitating solution (22). The solutions (12, 22) are spun from the spinneret apparatus (20) to form a hollow fiber which is quenched and wound on a take-up wheel (40). The product of the processes of the invention is a high quality fiber that can be used in a variety of medical end uses including renal dialysis, blood filtering, etc.