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Paste Extrusion of Polytetrafluoroethylene (PTFE) Fine Powder Resins

โœ Scribed by Savvas G. Hatzikiriakos; Alfonsius B. Ariawan; Sina Ebnesajjad


Publisher
John Wiley and Sons
Year
2002
Tongue
English
Weight
442 KB
Volume
80
Category
Article
ISSN
0008-4034

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Polytetrafluoroethylene (PTFE) is known to be a polymer that shows inherent microstructure formation during cold processing such as paste extrusion. To model such a complex flow, a viscoelastic constitutive equation is proposed that takes into account the continuous change of the paste microstructur

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Polytetrafluoroethylene (PTFE) virgin powder was ultradrawn uniaxially by a two-stage draw. A film, compression molded from powder below the melting temperature (T m ), was initially solid-state coextruded to an extrudate draw ratio (EDR) of 6 -20 at an established optimum extrusion temperature of 3