Accession Number:

AD0260740

Title:

FUNDAMENTAL STUDIES OF THE DISPERSIBILITY OF POWDERED MATERIALS

Descriptive Note:

Corporate Author:

GENERAL MILLS INC MINNEAPOLIS MINN

Personal Author(s):

Report Date:

1961-06-30

Pagination or Media Count:

1.0

Abstract:

A technique involving the use of a 2-in.-diam fluid energy mill was devised for blending and deagglomerating powders. A study of average bulk density as a function of plug length and compressive load was made on each of the 3 base powders saccharin, Span 60, and Carbowax 6000. The effect of removal of adsorbed gases and vapors was investigated by disk-lifting tests on samples of the 3 base powders under normal laboratory conditions and under high vacuum conditions 0.00002 mm Hg. A technique involving stratified layers was devised for the purpose of studying powder displacement during disk-lifting tests. An improved technique for me suring shear strength of powders is described. Aerosol decay tests were made on samples of the same powders on which shear strength measurements were made. A comparison of results indicates that there is little correlation. A theoretical sstudy was made to determine energy expended in dispersing an aerosol. Electrostatic charge analyses were made on aerosols of Span 60 and Carbowax 6000. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE