Optimize electrostatic powder coatings.Electrostatic Stationary electrical charges in which no current flows. For example, laser printers and copier machines place a positive charge of the image on a drum, and negatively charged toner is attracted onto the drum. The toner is then transferred to positively charged paper and fused to the paper by heat. coatings are used in snack foods A list of snack foods is shown below. For more information, see snack foods. List of snack foods Chips (Crisps)
The purpose of research at The Ohio State University Ohio State University, main campus at Columbus; land-grant and state supported; coeducational; chartered 1870, opened 1873 as Ohio Agricultural and Mechanical College, renamed 1878. There are also campuses at Lima, Mansfield, Marion, and Newark. was to use research surface methodology (RSM RSM (in Britain) regimental sergeant major ) to optimize the airflow settings, particle size Particle size, also called grain size, refers to the diameter of individual grains of sediment, or the lithified particles in clastic rocks. The term may also be applied to other granular materials. , voltage and food height in a belt conveyer electrostatic powder applicator ap·pli·ca·tor n. An instrument for applying something, such as a medication. applicator, n a device for applying medication; usually a slender rod of glass or wood, used with a pledget of cotton on the end. . By gaining knowledge of the powder properties important for coating efficiency and reproducibility, processors can optimize their coating systems and save money, time and energy. The RSM evaluated transfer efficiency and reproducibility at 20 kV, 30 kV and 40 kV; at 0 cm, 1.5 cm and 3 cm of height; at airflow settings of 20, 30, and 40; at salt particle sizes of 230.9 [micro]m, 122.2 [micro]m and 15.48 [micro]m; and sugar particle sizes of 268.46 [micro]m, 113.63 [micro]m and 19.62 [micro]m. Pre-cleaned slides were coated electrostatically in the powder applicator. The efficiency of the process was determined by the ratio of the weight of the powder on all of the slides divided by the total amount of powder added into the system and the percentage of area that the slides covered. Reproducibility was determined by relative standard deviation In probability theory and statistics, the Relative Standard Deviation (RSD or %RSD) refers to the absolute value of the coefficient of variation expressed as a percentage. It is widely used in analytical chemistry to express the precision of an assay. l x 100. For salt, the efficiency increased with distance from the belt and direct right airflow setting. The highest efficiency was produced at intermediate sizes near 100 [micro]m. The reproducibility increased with distance from the belt and direct right airflow setting. The highest reproducibility was produced at intermediate sizes near 100 [micro]m. For sugar, the efficiency increased with size, direct right airflow setting and direct left airflow setting. The reproducibility increased with size, voltage, distance from belt and back inject airflow setting. Size, voltage, distance from the belt, airflow setting and the type of powder significantly affected the powder distribution. Further information. Sheryl Barringer, Department of Food Science and Technology, Ohio State University, 2015 Fyffe Ct., 110 Parker Food Science Building, Columbus, OH 43210; phone: 614-292-6281; fax: 614-292-0218; email: barringer.11@osu.edu. |
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