The components, of organic or inorganic origin, added to the matrix share the characteristic of existing in the form of agglomerates. A high-quality Masterbatch implies their dispersion in aggregates, with dimensions the most homogeneous as possible and a correct distribution inside the polymer.

The dimensional reduction and homogenization are obtained through the effect of a mechanism of intrusion/erosion created by high shear fields and elongational rate during the working phase. With such flow fields, it is absolutely necessary to avoid the compaction of the dispersed phase, which can occur during the process and causes the re-formation of agglomerates.Each substance to be additivated at the matrix differs and can therefore require a different process.This can be achieved in several ways with the co-rotating twin-screw extruder.

All extruders can produce Masterbatch. Taking advance of the decennial experience at MARIS, it is possible to diversify their use by exploiting their geometry in function of the materials to process.

Each substance to be additivated at the matrix differs and can therefore require a different process. This can be achieved in several ways with the co-rotating twin-screw extruder. Considering the different requirements of the materials to be processed, the Masterbatch can be improved by means of various methods, the most efficacious being the change in the geometry of the screw channel. This can be accomplished using special elements, but also by means of a suitable D/d.