Patent ID: 8541528

Claim:
A process for producing water-absorbing polymer particles by polymerizing an aqueous monomer solution or suspension comprising a) at least one ethylenically unsaturated monomer which bears an acid group and optionally at least partly neutralized, b) at least one crosslinker, c) at least one initiator, d) optionally one or more ethylenically unsaturated monomer copolymerizable with the monomer mentioned under a), and e) optionally one or more water-soluble polymer, comprising drying a resulting aqueous polymer gel in a forced-air belt drier by means of a circulating conveyor belt, grinding, classifying and optional thermal surface postcrosslinking, wherein the surface of a conveyor belt has a multitude of elevations or depressions for restricting mobility of the aqueous polymer gel in a transverse direction, wherein the surface of the conveyor belt has a multitude of spikes with a height of 0.01 to 5 cm.