Extrusion & Post
7 مشاهدة
Ridges in PET film winding
ظاهرة المشكلة
Local protrusions (ridges) appear on the end face after PET film winding, affecting slitting and use.
تحليل الأسباب
Local film thickness is too thick, forming ridges; winding tension is uneven; the film slips on the roller surface.
الحل
Improve transverse thickness uniformity (automatic die lip control); optimize the winding tension curve; use nip rollers to improve winding flatness.
الخلاصة الأساسية
PET film ridges are a comprehensive manifestation of uneven thickness and poor winding.
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