METHOD AND APPARATUS FOR FORMING ELONGATE PTFE MATERIAL AND PTFE MATERI AL PARTICULARLY DENTAL FLOSS

An elongate PTFE material is formed by passing an unsintered PTFE tape across a heated surface in sliding contact therewith while applying tension to the tape, such that the PTFE tape, when its temperature is raised by contact with the heated surface (8), is longitudinally stretched with simultaneou...

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Bibliographische Detailangaben
Hauptverfasser:	BLASS, JACOB MOSES, MURRAY, JOHN
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE DENTISTRY HUMAN NECESSITIES HYGIENE MEDICAL OR VETERINARY SCIENCE 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 elongate PTFE material is formed by passing an unsintered PTFE tape across a heated surface in sliding contact therewith while applying tension to the tape, such that the PTFE tape, when its temperature is raised by contact with the heated surface (8), is longitudinally stretched with simultaneous width and thickness reduction while in contact with the surface. PTFE tapes having different properties, e.g., coefficients of friction at opposite faces can be produced. Such tapes are suitable for use as dental flosses.