Velocity Fields of Melt Blowing Dies, 1999 Nonwovens Conference Proceedings
Robert L. Shambaugh and Brian D. Tate
Department of Chemical Engineering
University of Oklahoma
What drives the melt blowing process is the transfer of momentum from the high velocity air to the extruded polymer filaments. To understand and improve this transfer, air velocity fields were measured below various configurations of melt blowing dies. The following five die (nozzle) types were tested: (1) a die where the jets met at a 60 o angle and the die tip was blunt, (2) a die with a 60 o angle and a sharp tip, (3) a die with a 70 o angle and a sharp tip, (4) a sharp 60 o die with an inset, and (5) a sharp 60 o die with an outset. Correlations were developed to predict the velocity fields below these die types.
Velocity Fields of Melt Blowing Dies, 1999 Nonwovens Conference Proceedings