Molding Process
2 مشاهدة
PPSU product yellowing and browning
ظاهرة المشكلة
PPSU transparent amber products further darken and turn brown after processing.
تحليل الأسباب
Excessively high processing temperature or excessively long residence time causes thermo-oxidative degradation and color deepening.
الحل
Control barrel at 340-360°C (low limit); nitrogen protection; shorten residence.
الخلاصة الأساسية
Although PPSU is ultra-high temperature stable, it still has a degradation boundary.
هل كان هذا مفيدًا؟
0 شخص وجدوا هذا مفيدًا
شكرًا لك على ملاحظاتك!