the present invention relates to a sinter powder composed of polyamide which also comprises pmmi , pmma , or copolymers with pmmi , in particular pmmi - pmma copolymers , to the use of this sinter powder for laser - sintering , and also to moldings produced from this sinter powder . the moldings made from the powder of the invention have marked advantages over conventional products in their appearance and in their surface quality , especially as far as roughness and dimensional stability during selective laser sintering are concerned . in addition , moldings produced from the sinter powder of the invention also have better mechanical properties than moldings based on conventional nylon - 12 powders , in particular in terms of modulus of elasticity and tensile strength . these moldings also have a density close to that of injection moldings .