Open time (hotmelt)

• The time between the application of the adhesive and the application of the substrate to be bonded, whereby the connection is still established.
• The open time of the adhesive should be longer than that of the application.

Factors that influence the setting speed and open time

• Adhesive composition
• Ambient temperature (draft, cold, heat)
• Substrate composition (heat-conducting, porous)
• Substrate condition (cold, warm, wet)
• Adhesive quantity
• Applied adhesive form
• Distance from the nozzle to the substrate
• Pressure and pressure