METHOD FOR THERMAL SURFACE POST-CROSSLINKING IN A DRUM-TYPE HEAT EXCHANGER HAVING AN INVERSE SCREW FLIGHT

摘要

The invention relates to a method for the thermal surface post-crosslinking of water-absorbing polymer particles, wherein the polymer particles are coated with an aqueous solution, the coated polymer particles are disaggregated, and the disaggregated polymer particles are thermally surface post-crosslinked by means of a drum-type heat exchanger having an inverse screw flight.