PAEK powder, in particular for use in a method for layerwise manufacturing a three-dimensional object, and to processes for the preparation thereof

By a temperature treatment a polyaryletherketone powder is prepared so that it is especially suitable for use in a method for layer-wise manufacturing of a three-dimensional object. For this purpose, the powder is annealed as a building material at a temperature of at least 20 ° C above the glass transition temperature for at least 30 minutes prior to use.