Coating colors are rheologically complex materials. Their viscosity is strongly dependent on shear rate. Modern highspeed coaters generate shear rates > 500 000 1/s
ACA AX-100 measures viscosity at shear rates up to 1 000 000 1/s whereas low shear rheograms that are commonly used in the industry demonstrate only low shear viscosity portion and can be extremely misleading when it comes to the prediction of coating performance or runnability on high speed coaters.
ACA AX-100 is very user friendly and one measurement takes less than 1 minute.
It is used for solving root causes of common coating problems like poor coating runnability, coating defects or web brakes at coater. Also it can be used for coating raw material quality control.
New coating recipes like water based barried coatings (WBBC) are very challenging in terms of runnability. ACA AX-100 provides valuable data for coating development before full scale trials.
Optimize pigment particle size distribution for higher solids, better quality etc…
Optimize binder and co-binder amounts
Troubleshoot coating defects
Optimize coater runnability
Study the influence of temperature on coating behavior
Develop new coating recipes
Select right thickeners and other coating materials
Develop coating materials to replace plastic packaging
Define the operating window of complex barrier materials
Check the coating rheology at ultra-high share rates
Study the influence of various materials on coating rheological behavior
Binder, pigment, additive suppliers & research centers
According to our experiences the screening problems can be identified with ACA ultra-high shear viscometer”
Understanding of the flow characteristics at realistic shear rates is utmost important for us in order to formulate new advanced specialty coatings”