There are 3 main target grease applications where Sonic’s Colloid Mills are used quite effectively:
1) Lithium greases, or soap-based greases – white in appearance and comprised of fatty acids and salts. They tend to be very temperature tolerant, non-corrosive and adhere nicely to metal surfaces.
2) Polyurea greases – byproducts of resin compounds, amines and isocyanate. This mixture makes for much higher tolerance to heat for longer periods of time, therefore becoming a common choice for bearing manufacturers.
3) Bentonite grease – manufactured using bentonite clay which imparts excellent sealing properties as well as resistance to softening at higher temperatures.
The soaps in the lithium and aggregates or clays within the polyurea and bentonite need to be properly dispersed within the liquid medium without over-shearing. Any milling equipment needs to handle the high viscosity of these fluid mixtures as well. This is where our colloid mills for grease do a great job!