Extrusion & Post
3 Aufrufe
Ridges in PET film winding
Problembeschreibung
Local protrusions (ridges) appear on the end face after PET film winding, affecting slitting and use.
Ursachenanalyse
Local film thickness is too thick, forming ridges; winding tension is uneven; the film slips on the roller surface.
Lösung
Improve transverse thickness uniformity (automatic die lip control); optimize the winding tension curve; use nip rollers to improve winding flatness.
Wichtigste Erkenntnis
PET film ridges are a comprehensive manifestation of uneven thickness and poor winding.
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