Processing Machinery
6 مشاهدة
Difficult PVA purging
ظاهرة المشكلة
PVA purging requires 2-3h, time-consuming, affecting changeover efficiency
تحليل الأسباب
PVA has strong adhesion forming a firm adhered layer on the screw and barrel; PVA has poor thermal stability and becomes sticky at high temperature, harder to remove
الحل
1) Flush with high-viscosity PE before purging to carry away PVA residue; 2) Lower purging temperature below the PVA softening point to reduce adhesion; 3) Use a dedicated purging compound
الخلاصة الأساسية
Difficult purging is caused by strong PVA adhesion; PE flushing and temperature reduction are the key
هل كان هذا مفيدًا؟
0 شخص وجدوا هذا مفيدًا
شكرًا لك على ملاحظاتك!