Italian extruder manufacturer's system designed to produce devulcanised rubber with very high-quality standards

Rosta, Italy - Italian manufacturer of co-rotating twin-screw extruders MARIS SpA is presenting at K2022 a new two-step, devulcanisation process.

Called Erovec Rubber plus, the innovative system is designed to produce devulcanised rubber with very high-quality standards.

The first stage involves devulcanization of the rubber by means of a corotating twin-screw extruder - characteristics equivalent to Evorec Rubber. The rubber thus devulcanised will feed, by direct connection, the second extruder.

In the second stage, the combination of a single-screw extruder and a screen-changer offers the possibility of achieving significant advantages:

Sudden cooling of the devulcanised rubber: this operation makes it possible to contain the temperature of the extruded strip while minimizing rubber degradation.

The effects are observable both in terms of mechanical properties of the recycled material and in terms of reduced odor gas emissions;

Rubber filtration: this operation, made possible by the high thrust capacity of the single-screw extruder, allows the devulcanised rubber to be filtered before extrusion.

This, again, serves to increase the mechanical properties and, more generally, the qualities of the recycled material, explains MARIS.