Material Analysis
13 مشاهدة
High density of PET extruded foamed sheet
ظاهرة المشكلة
PET foamed sheet density higher than target value (e.g., >0.5g/cm³), unsatisfactory weight reduction effect.
تحليل الأسباب
Insufficient foaming agent addition or incomplete decomposition, foaming temperature too low with insufficient gas expansion, insufficient melt strength with gas escaping.
الحل
Increase foaming agent dosage or switch to high-efficiency foaming agent; increase foaming temperature; use chain extenders to increase melt strength; optimize the die head.
الخلاصة الأساسية
PET foaming density control requires synergy of melt strength, foaming agent, and process.
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