Thermoforming
3 Aufrufe
Linear gel particles and delamination on PET sheet surface
Problembeschreibung
Gel particles on the PET extruded sheet surface align in lines along the extrusion direction, and linear holes appear during '2079851475616104458.
Ursachenanalyse
There is material hang-up or damage at a certain point of the die lip; material residence time at that point differs, causing local degradation and forming a linear defect.
Lösung
Clean and polish the die lip and check for scratches; adjust the die lip temperature at that point; use a melt pump to stabilize pressure.
Wichtigste Erkenntnis
PET linear gel particles point to a problem at a specific die lip position.
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