VACUUM COATER OVERVIEW
Vacuum coating is a process when liquids is introduced subsequently in extruded feed, pellets or porous products. This is done by the product being sprayed with fat/liquid during the vacuum. Then the vacuum breaks and the liquid is forced into the interior of the product.
Depending on the process parameters, almost all pores can be filled with liquid. Extrudates with a larger pore volume absorb more liquid than comparatively dense pellets. Vacuum coating is a standard process in the production of fish feed. Depending on the feed type or fish species, 4 to 40 % oil are subsequently applied to the extruded fish feed.
Also in the field of dry dog and cat food, this method is being increasingly used, since this is the only way to reach a superior product quality.