초록 ▼

By a temper treatment a polyaryletherketone powder is processed such that it is particularly suited for the use in a method for a layer-wise manufacturing of a three-dimensional object. To this effect the powder is tempered at a temperature that is at least 20° C. above the glass transition tem

By a temper treatment a polyaryletherketone powder is processed such that it is particularly suited for the use in a method for a layer-wise manufacturing of a three-dimensional object. To this effect the powder is tempered at a temperature that is at least 20° C. above the glass transition temperature for at least 30 minutes before it is used as building material.

대표청구항 ▼

The invention claimed is: 1. Method for producing a polyaryletherketone (PAEK) powder for layered manufacturing of a three-dimensional part, comprising: exposing a PAEK fine powder, which has been manufactured by grinding, or a precipitation process from a solvent, or melt spraying or spray drying

The invention claimed is: 1. Method for producing a polyaryletherketone (PAEK) powder for layered manufacturing of a three-dimensional part, comprising: exposing a PAEK fine powder, which has been manufactured by grinding, or a precipitation process from a solvent, or melt spraying or spray drying from a coarse powder or granulate, to a temperature T that lies at least 20° above the glass transition temperature determined by means of DSC according to DIN 53765 for a period that is longer than 30 min. 2. Method according to claim 1, in which the temperature T is selected to be at least 50° C. above the glass transition temperature Tg of the powder determined by means of differential scanning calorimetry (DSC) according to DIN 53765. 3. Method according to claim 1, in which the temperature T is selected to be below the melting point TS of the powder determined by means of differential scanning calorimetry (DSC) according to DIN 53765. 4. Method according to claim 3, in which the temperature T is selected to be 20° C. below the melting point TS of the powder determined by means of differential scanning calorimetry (DSC) according to DIN 53765. 5. Method according to claim 3, in which the temperature T is selected to be 30° C. below the melting point TS of the powder determined by means of differential scanning calorimetry (DSC) according to DIN 53765. 6. Method according to claim 1, in which the powder is exposed to the temperature T by irradiating it with electromagnetic radiation or particle radiation. 7. Method according to claim 6, in which the powder is exposed to the temperature T by irradiating it with IR-radiation or microwave-radiation. 8. Method according to claim 6, in which a portion of the supplied thermal energy for reaching and keeping the temperature T is supplied to the powder by means of a mechanical treatment. 9. Method according to claim 7, in which a portion of the supplied thermal energy for reaching and keeping the temperature T is supplied to the powder by means of a mechanical treatment. 10. Method according to claim 1, in which the PAEK fine powder that is used as starting material comprises a powder from the group polyetheretherketone (PEEK), polyetherketoneketone (PEKK), polyetherketone (PEK), polyetheretherketoneketone (PEEKK) or polyetherketoneetherketoneketone (PEKEKK). 11. Method according to claim 1, wherein at least one additive is added to the PAEK fine powder as further component. 12. Method according to claim 11, wherein the additive is worked into the powder by means of a fusion joining. 13. Method according to claim 1, wherein the treatment of the starting powder is performed under an inert gas atmosphere.