Extrusion & Post
4 görüntüleme
POE extrusion melt fracture
Sorun Belirtisi
When the POE extrusion rate is too high, severe melt fracture occurs, and the extrudate shows spiral distortion
Neden Analizi
POE melt elasticity too high, elastic recovery at the die exit exceeds the critical value; die L/D ratio too short <10, melt not fully relaxed; extrusion temperature too low
Çözüm
1) Reduce extrusion rate to 2-3m/min; 2) Increase die L/D ratio to 15-20; 3) Increase extrusion temperature to 160-200°C; 4) Add a small amount of low-elasticity resin to reduce system elasticity; 5) Progressive converging die entrance design
Temel Çıkarım
Melt fracture is caused by elastic recovery exceeding the critical value; reducing speed and lengthening the die are the core countermeasures
Bu faydalı oldu mu?
0 kişi bunu faydalı buldu
Geri bildiriminiz için teşekkürler!