Continuous Production with Coperion Technology
"Reactive sealants" are chemically hardening single component systems. The cross-linking of the substrate is initiated by exposure to humidity (RTV) and/or heat (HTV).
Coperion has already developed many processing systems for the production of reactive sealants. The core of these systems is the ZSK twin screw extruder, which ensures a reproducible reaction with high process stability at consistently high product quality without batch-to-batch variations.
Low bulk density and fluidizing raw materials (e.g. silica), are introduced via ZS-B side feeders. These are equipped with the patented Feed Enhancement Technology FET developed in-house by Coperion. The FET applies a vacuum in the ZS-B feeding zone by means of a porous, gas-permeable wall. Considerably improved feeding and flow rates are achieved, even for silica amounts above 10% of the overall formulation. Using the ZSK extruder, processing can take place without moisture, preventing unwanted cross-linking of RTV sealants (e.g. PUR sealants) in the process section.