Powder sink test
A powder sinking test is used to investigate the wetting kinetics of powders. Sometimes it is referred to as an immersion test (although there are also immersion or sinking tests for corrosion measurements and other specialist areas). The hydrophobization, i.e. the wettability in an aqueous dispersion medium, is measured.
procedure
To do this, a powder is placed over a liquid on a snap slide. To start the experiment, the snap slide is suddenly pulled away so that the powder comes into contact with the liquid. Then the time until the powder has completely sunk into the liquid can be stopped. With a laser distance sensor you can also follow the height of the powder pile live. Sink tests are traditionally used for researching instantized foods, but are also suitable for other areas such as: B. for the pharmaceutical industry.
Individual evidence
- ↑ Dipl.-Ing. A. Ibach, Prof. Dr.-Ing. M. Kind: Product formulation by means of spray drying with superimposed absorption and reaction. Max Buchner Research Foundation, accessed on March 20, 2019 .
- ↑ Entry on immersion test. In: Römpp Online . Georg Thieme Verlag, accessed on June 4, 2020.
- ↑ Dental Knowledge Lexicon - Start. Retrieved March 20, 2019 .
- ↑ Non-stick coating for textiles - Document DE10116199A1. Retrieved March 20, 2019 .
- ↑ Am: mattress test: Leesa mattress test: extensive test report, material test for pressure relief. In: Mattress Test. July 21, 2018, accessed March 20, 2019 .
- ↑ 8th lecture “Basics of Product Design”. P. 12 , accessed March 20, 2019 .
- ^ S. Hogekamp and H. Schubert: Rehydration of Food Powders . In: Food sci. technol. int. 9 (Ed.): (3) . S. 223-235 .