Extrusion & Post
5 görüntüleme
Pearl luster spots on PET bottle body
Sorun Belirtisi
Pearl-like shiny spots appear locally on the PET bottle body, obviously different gloss from surroundings.
Neden Analizi
The stretching temperature in that area is in the fastest PET crystallization range (140-170°C); stress-induced crystallization produces large amounts of tiny grains.
Çözüm
Optimize preform heating temperature distribution to avoid local overheating; adjust infrared lamp power distribution; increase stretching speed to quickly pass through the crystallization temperature zone.
Temel Çıkarım
PET pearl luster spots are a manifestation of local excessive crystallization; heating temperature control is key.
Bu faydalı oldu mu?
0 kişi bunu faydalı buldu
Geri bildiriminiz için teşekkürler!