Coating processes – Measuring – testing – or indicating
Patent
1988-12-05
1990-04-10
Beck, Shrive
Coating processes
Measuring, testing, or indicating
427157, 427185, 427213, 427215, B05D 122
Patent
active
049159763
ABSTRACT:
A process is disclosed for applying a lubricant to a powdered material to control the fluidity of the powdered material. In the process one first obtains at least x number of samples of the powdered material without lubricant. Thereafter, increasing amounts of lubricant are applied to x-1 number of the samples. The bulk and tap densities of the samples are then measured and the Hausner ratio from the densities is calculated. The Hausner ratio versus the concentration of the lubricant in the powder samples is plotted and the concentrations of the minima lubricant in the powder samples at the point of the plot obtained in step e are determined. The concentration of lubricant determined in step f is applied to the remainder of the powdered material whereby an operational level of fluidity of the powder is achieved.
REFERENCES:
patent: 4710674 (1987-12-01), Sigai
Brown Doris L.
Chenot Charles F.
Lutz Deborah V.
Munn Robin W.
Beck Shrive
Castle Donald R.
GTE Products Corporation
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