VERFAHREN UND VORRICHTUNG ZUM EXTRUDIEREN UND ABSCHRECKEN EINER POLYMEREN FOLIE

1469983 Quenching polymeric film IMPERIAL CHEMICAL INDUSTRIES Ltd 9 July 1975 [7 Aug 1974] 34781/74 Heading B5B Polymeric film 4 is extruded on to an electrically earthed moving casting surface 3 of a casting drum 2 rotating in the direction shown by the arrow A at a speed greater than that at which...

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Bibliographische Detailangaben
Hauptverfasser:	ALAN REMMINGTON,TIMOTHY, ROBINSON,WILLIAM
Format:	Patent
Sprache:	ger
Schlagworte:	AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING MAKING GRANULES OR PREFORMS PERFORMING OPERATIONS PREPARATION OR PRETREATMENT OF THE MATERIAL TO BESHAPED RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIALCONTAINING PLASTICS 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:	1469983 Quenching polymeric film IMPERIAL CHEMICAL INDUSTRIES Ltd 9 July 1975 [7 Aug 1974] 34781/74 Heading B5B Polymeric film 4 is extruded on to an electrically earthed moving casting surface 3 of a casting drum 2 rotating in the direction shown by the arrow A at a speed greater than that at which bubbles can be prevented from being entrapped between the molten film and the surface, e.g. peripheral speeds of 140-240 ft./min., after first passing an electrostatic pinning electrode 7 and a suction knife 10 located on the opposite side from the pinning wire. The pinning wire is insulated over that length not covering the film 4 to prevent sparking. The film is preferably polyethylene terephthalate.