Material Drying
4 görüntüleme
PET vented extrusion drying-free
Sorun Belirtisi
Attempting to produce PET sheet with a vented extruder completely without drying, the products still have bubbles
Neden Analizi
A vented extruder can only remove surface moisture, and the deep-layer moisture of crystallized PET pellets still requires hopper drying; venting is insurance rather than a replacement, and completely eliminating drying carries extremely high risk
Çözüm
①Pre-dry to 50 ppm and then use venting as a backstop; ②regularly calibrate the vacuum degree of the venting section; ③the drying process must not be canceled on the grounds of venting; after adjustment, take consecutive samples to verify the effect, and resume mass production only after confirming stability
Temel Çıkarım
PET vented extrusion is a double-insurance mode of drying plus venting; skipping drying and relying only on venting, the deep-layer moisture will inevitably collect its debt in the form of bubbles; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence
Bu faydalı oldu mu?
0 kişi bunu faydalı buldu
Geri bildiriminiz için teşekkürler!