Coarse particles (x > 20 µm) must be completely separated from a high-quality polymer dispersion. The difference in density between the particles compared to the fluid is negligible. The dispersion has a viscosity of 1000 mPas (1000 times higher than the viscosity of water) and the coarse particles have a concentration of only 20 ppm. Every sieving process tested for this demanding application failed due to poor results like:

• no satisfying cut point
• excessive product loss
• low throughput rates
• interrupted production and high operating costs by permanently clogged filter

With the BoCross MicroScreen filter the dispersion can be sieved in an economical way with best results like

• cut point at 20 µm
• continuous operation with high throughput rate of 4000 l/h per filter
• extremely low amount of retentate or product loss, resp., of only 0,1 %
• extremely long life time of the specially designed sieves