Extrusion & Post
3 Aufrufe
ETFE melt extrusion sharkskin/melt fracture
Problembeschreibung
ETFE extruded product surface is rough or has periodic streaks
Ursachenanalyse
Extrusion speed too high exceeding critical shear rate; die temperature too low; critical shear stress threshold of ETFE
Lösung
Reduce extrusion speed; increase die temperature by 5-10°C; polish the die to reduce friction
Wichtigste Erkenntnis
ETFE has melt fracture phenomenon similar to FEP/PFA
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