Low-shear handling of suspensions with an intermittent dispersing phase
Liquid Powder Processing
12. May 2021
Informationen aus der Verpackungsbranche
The classic manufacturing process for powders is called Powder Compaction: Dry powders are compacted with a pounder to form a solid unit (a disc or other form). Finished products are i.e. eye shadow or blush.
But in some manufacturing processes powders are formulated in a liquid phase. This often results in complex fluid characteristics. The behavior is sometimes rheopex, i.e. shear-thickening over a period of time. Shear causes the solid component to compress, the liquid is extracted, and the product can therefore no longer be dosed.
To handle this, the ViscoTec endless piston principle uses a low-shear dosing method for continuous and low-pulsation dosing and filling. After the dosing process, the intermittent dispersing phase is evaporated and the suspended solids form a solid structure. In this way, color gradients can be achieved in addition to shapes, such as lettering or patterns. Different products can also be combined. Also the mixing ratio of two material components is flexible.
https://www.viscotec.de/en/continuous-mixing-and-filling-of-viscous-materials/
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