SYSTEM ZUR ZUFUEHRUNG VON FLUIDEN MEDIEN

System for restricting heat build-up in polymeric melts due to passage through a filter, comprises locating downstream from the filter a passage intersected by >=1 hollow finger contg. a volatile fluid beneath reflux condensers. Used esp. for limiting the upper melt temps. of non-Newtonian polyme...

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Bibliographische Detailangaben
Hauptverfasser:	M. KENNARD,HARRY, I. SCHAEFFER,JOHN
Format:	Patent
Sprache:	ger
Schlagworte:	AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING BLASTING HEAT EXCHANGE IN GENERAL HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS,IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT HEATING LIGHTING MECHANICAL ENGINEERING 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 WEAPONS WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Beschreibung
Zusammenfassung:	System for restricting heat build-up in polymeric melts due to passage through a filter, comprises locating downstream from the filter a passage intersected by >=1 hollow finger contg. a volatile fluid beneath reflux condensers. Used esp. for limiting the upper melt temps. of non-Newtonian polymers during high speed extrusion of fine filaments or other applications requiring filtered material of controlled melt viscosity. System is partic. claimed for extruding polyesters at a nominal melt temp. of 286 degrees C with coolant chamber melt temp. maintained at 288-292 degrees C max. System can accept melt of varying temp. resulting from successive alternate use of two filter units installed in parallel between an extruder and a filament die, to allow each filter to be purged without stopping throughput. By suitable choices of reflux fluids and reflux chamber pressure, the cooling chamber may be adjusted to control to specific limits with a tolerance of =4 degrees C.