| abstract |
The invention relates to powders for use in a layered process for the production of moldings, in which selectively areas of the respective powder layer are melted by the introduction of electromagnetic energy containing composite particles which are represented by wholly or partially coated with a precipitated polymer glass particles, wherein the Glass particles have a mean grain diameter d 50 from 3 to 100 microns. The invention further provides a process for the production of powders for selective laser sintering, wherein a polymer under the action of pressure and / or temperature to produce an at least partial solution with a medium containing solvent which dissolves the polymer in the presence of glass particles in And then the polymer is precipitated out of the at least partial solution, and obtaining composite particles which are represented by wholly or partially coated with a precipitated polymer glass particles, wherein the glass particles have a mean grain diameter d 50 of 3 to 100 microns. Furthermore, the invention provides a process for the production of moldings by a layer-by-layer process, in which selectively areas of the respective powder layer are melted by the introduction of electromagnetic energy, wherein the selectivity is achieved by the application of susceptors, inhibitors, absorbers or by masks, wherein at least one powder is used, which contains composite particles which are wholly or partially coated with a precipitated polymer, wherein the glass particles have a mean grain diameter d 50 of 3 to 100 microns. |