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