Colloid Mill Case Study – Pigment Dispersions

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A manufacturer approached Sonic with an application to disperse and de-agglomerate a pigment used to color a plastic part they were manufacturing. The pigment would agglomerate and cause color bursts inside the plastic. While there was no damage to the integrity of the product, however, the color appeared inconsistent and was perceived by the end-user as problematic. Sonic recommended a Colloid Mill for this dispersion application.

The application was defined as a 4-5 gallon per month run of pigment in a carrier medium. After initial trials at the Sonic lab which showed improvements in the pigment dispersion and eliminated the inconsistent color, Sonic recommended a 2.5-inch lab scale colloid mill. The lab scale would more than handle the low volume demand for colorant.

After installation of the 2.5” lab scale colloid mill the client’s demand increased appreciably within the first six months. It was obvious to the manufacturer and Sonic that the duty for the mill had changed dramatically and the 2.5” mill was no longer the correct equipment for the job. Therefore, Sonic issued a full credit for the purchase of the 2.5” mill toward purchase of the production scale 4” RotoMillTM Colloid Mill. This mill was designed to handle the new demand with plenty of capacity for the future.

Sonic now has a used 2.5” mill in inventory and a very pleased client. In general, Sonic does not enter the used equipment market, because we manufacture and sell new equipment. However, in this case serving the best interests of our client meant gaining a lightly used 2.5” mill. Standing behind our customers is not just an idea on a poster at Sonic – it is how we operate day to day for over 50 years.

Images of used 2.5″ lab scale Colloid Mill 

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About the Author:

Rob Brakeman
Owner & Director