Thermoforming
6 مشاهدة
Linear gel particles and delamination on PET sheet surface
ظاهرة المشكلة
Gel particles on the PET extruded sheet surface align in lines along the extrusion direction, and linear holes appear during '2079851475616104458.
تحليل الأسباب
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.
الحل
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.
الخلاصة الأساسية
PET linear gel particles point to a problem at a specific die lip position.
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