Patent ID: 8591797

Claim:
A layer-by-layer process for production of three-dimensional components, comprising: selective melting of regions of a powder layer of a copolyamide powder through introduction of electromagnetic energy wherein said melting occurs during said introduction of electromagnetic energy, wherein said powder comprises monomers of: 75 to 98 parts of (a) a laurolactam or an ω-aminoundecanoic acid, and 25 to 2 parts of a copolyamide component consisting of a diacid (b) and a diamine (c), wherein said diacid (b) is a dodecanedioic acid or sebacic acid, and said diamine (c) is a decanediamine or a dodecanediamine, and wherein said powder has a BET surface area of 5 m 2 /g or less.