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US 8,173,258 B2Granted
Powder with improved recycling properties, process for its production, and use of the powder in a process for producing three-dimensional objects
AssigneeEvonik Degussa GmbH
InventorsSylvia Monsheimer, Ulrich Simon, Maik Grebe, Franz-Erich Baumann, Wolfgang Christoph, Stefan Altkemper
Life of this patent
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Abstract
A powder which is capable of being used in a layer-by-layer process in which regions of the respective pulverulent layer are selectively melted and, after cooling, are fixed, contains a mixture of diacid-regulated polyamide and diamine-regulated polyamide and/or diacid-regulated copolyamide and diamine-regulated copolyamide.
Claims57
A powder, comprising:
- a mixture of diacid-regulated polyamide and diamine-regulated polyamide and/or diacid-regulated copolyamide and diamine-regulated copolyamide;
- said powder being used in a layer-by-layer process in which regions of the respective pulverulent layer are selectively melted and, after cooling, are fixed.
A layer-by-layer process, comprising:
- selectively melting regions of at least one pulverulent layer comprising a powder comprising a mixture of diacid-regulated polyamide and diamine-regulated polyamide and/or diacid-regulated copolyamide and diamine-regulated copolyamide, and,
- after cooling, fixing of said at least one layer.
A molding, comprising:
- a powder comprising
- a mixture of diacid-regulated polyamide and diamine-regulated polyamide and/or diacid-regulated copolyamide and diamine-regulated copolyamide;
- said powder being used in a layer-by-layer process in which regions of the respective pulverulent layer are selectively melted and, after cooling, are fixed.
Dependencies are inferred from the claim text.