Melt fracture problem of PFA

Problembeschreibung

Melt fracture phenomenon appears on the surface during PFA extrusion

Ursachenanalyse

PFA melt can undergo elastic turbulence and wall slip even at low shear rates

Lösung

Reduce the extrusion speed; raise the die temperature

Wichtigste Erkenntnis

PFA has typical perfluoropolymer melt fracture behavior

PFAmelt fractureelastic turbulencedieextrusion

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