Understanding EVA Hot Melt Glue Stick Viscosity & Open Times

1. Melt Viscosity (Brookfield CPS @ 180°C)

Melt viscosity measures the flow resistance of molten EVA hot melt polymer. Low viscosity formulations (7,500 CPS) flow rapidly for automated carton erecting, while high viscosity formulations (14,500 CPS) fill gaps in wooden joinery.

2. Open Time & Set Time Dynamics

Open time is the window between glue application and joint assembly during which wet bonding occurs. Rapid 10-second open times suit packaging automation, while 45-second extended open times accommodate intricate handicraft art positioning.