The mixing time t_m is the minimum time required to obtain a desired level of homogeneity in the tank. It can be estimated for the most common mixing systems via empirical correlations. Assuming a desired homogeneity of 90%, as an example, at any time t greater than the mixing time t_m, the difference between the concentration of the addition in any point of the tank and its final concentration will not be larger than 10%.

This article details key solution preparation and mixing considerations for scaling up a coated product from small-scale laboratory to production.

Read part 2 of this two-part series, Design for Manufacturing: Solution Preparation & Mixing Techniques for Efficient Product Development, in the 2018 Quarter 3 issue of Converting Quarterly Magazine.

Read part 1 of this two-part series, Design for Manufacturing: Solution Preparation & Mixing Techniques for Efficient Product Development, in the 2018 Quarter 2 issue of Converting Quarterly Magazine.