Extrusion & Post
12 مشاهدة
Large PVA dimensional change with temperature
ظاهرة المشكلة
PVA product dimensions change >2% in the -20 to 60°C range
تحليل الأسباب
PVA thermal expansion coefficient large; crystallinity on the low side causing high dimensional temperature sensitivity; no annealing treatment, residual stress present
الحل
1) Add rigid filler to reduce the thermal expansion coefficient; 2) Annealing treatment to stabilize dimensions; 3) Select high crystallinity grade to reduce temperature sensitivity
الخلاصة الأساسية
Dimensional temperature sensitivity is caused by a large thermal expansion coefficient; adding filler and annealing are the key
هل كان هذا مفيدًا؟
0 شخص وجدوا هذا مفيدًا
شكرًا لك على ملاحظاتك!