| Résumé : |
Determine how to preserve powder value by investigating the conditions under which it deteriorates. Substantial effort is expended on producing powders with the flowability required for target applications. Caking, the process by which powders gain strength during uninterrupted storage, compromises these efforts, impacting powder processing and use. Caked pigments may be difficult to disperse, demanding more energy intensive mixing, for instance, while clumped powder coatings can exhibit poor fluidisation and flow behaviour, and erratic performance. Studies of caking behaviour provide a secure foundation for combatting it, to preserve the value added through particle engineering and the use of flow additives.
This article examines how powder testing with a powder rheometer (FT4 Powder Rheometer®, Freeman Technology, Tewkesbury, UK) can provide unique insight into caking behaviour, notably crusting. Experimental data demonstrate the benefits of these capabilities when developing optimal storage and handling protocols for specific powders. |
Aller sur edunet
Accueil
Ajouter le résultat dans votre panier Affiner la rechercheApplying powder testing to characterise caking behaviour in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 211, N° 4668 (04/2021)
