A PROCESS FOR MANUFACTURE OF LOW DENSITY POLYTETROFLUOROETHYLENE INSULATED CABLE

A PROCESS FOR MANUFACTURE OF LOW DENSITY POLYTETROFLUOROETHYLENE INSULATED CABLE

An improved process for manufacturing low density polytetrofluoroethylene insulated cable using a paste type extrudate to form a hollow tube of insulated material extruded about a wire conductor which passes through the extrusion die. As contrasted with earlier methods, the shaped extrudate paste is...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: DUNN, JOHN, A, GRIMES, WILLIAM, F., JR
Format: Patent
Sprache:eng ; fre ; ger
Schlagworte:
AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
PERFORMING OPERATIONS
SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR
SHAPING OR JOINING OF PLASTICS
TRANSPORTING
WORKING OF PLASTICS
WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Beschreibung
Zusammenfassung:An improved process for manufacturing low density polytetrofluoroethylene insulated cable using a paste type extrudate to form a hollow tube of insulated material extruded about a wire conductor which passes through the extrusion die. As contrasted with earlier methods, the shaped extrudate paste is stretched before removing the extrusion aid substantially at ambient temperature with only residual heat imparted by extrusion by a driven pulley, the peripheral speed of which may be varied in accordance with the speed of the extrudate. With the completion of the stretching, the increased outer surface and porosity of the extrudate permits faster removal of the extrusion aid immediately prior to entering a sintering oven.