Spinning disk atomization of wood resin-adhesives: I. Spray characteristics, atomization mechanism, and resin efficiency
Published: 2008
Muszynski, L.
Gardner, D. J.
Publication Name: Forest products journal
Abstract:
The spray characteristics and mechanism of spinning disk atomization by atomizing liquid polymeric diphenylmethane diisocyanate (pMDI) wood resin-adhesive were investigated in this study. The spray characteristics were measured using a laser diffraction analyzer and further analyzed by fitting with a mathematical model; the atomization mechanism was discussed by comparing the measurements and the predicted droplet size using empirical equations for centrifugal atomization. In addition, the relative resin efficiency using a spinning disk atomizer for resin-adhesive atomization was also discussed. It was found that the spinning disk sprayed pMDI resin-adhesive with a droplet size range mostly between 0.25 mu m and 60 mu m when the spray generation stabilized. The spinning disk atomization in this study was mostly in direct droplet formation and ligament formation mode. The concept of maximum resin efficiency originally defined by Burrows (1961) was suggested to be updated to “using the minimum amount of resin to produce desired panels with optimal properties required and minimum waste to the surrounding environment.”