METHOD FOR PRODUCING A THERMOPLASTIC POLYMER CERAMIC FILAMENT FOR 3-D PRINTING BY MEANS OF FUSED DEPOSITION Russian patent published in 2021 - IPC B22F3/20 B33Y70/10 B22F3/105 

FIELD: additive technology.

SUBSTANCE: invention relates to the field of additive technologies, in particular, to production of thermoplastic polymer ceramic filaments for producing three-dimensional ceramic structures using the fused filling technology. An initial mixture is prepared, containing a filler, a thermoplastic binder and a polymethylsiloxane resin. Nanoscale aluminium oxide (Al₂O₃) powder, pre-dried in vacuum for 6 to 8 hours at a temperature from 120 to 150°C, is used as a filler. The initial mixture comprises, wt.%: nanoscale aluminium oxide (Al₂O₃) powder 45 to 65, thermoplastic binder 15 to 40, polymethylsiloxane resin 15 to 20. Mixing is executed simultaneously with extrusion in the chamber of a twin-screw extruder at a temperature from 115 to 140°C and with the time of mixing prior to the beginning of extrusion from 40 to 60 minutes.

EFFECT: free passage of the composition through the nozzle with specified printing parameters is ensured.

1 cl, 1 dwg, 2 tbl, 3 ex