POLYMER COMPOSITION FOR SELECTIVE SINTERING

摘要

A polymer powder composition for production of shaped objects via selective laser sintering includes a thermoplastic material, which is a polyester, wherein the powder has specific particles size distribution. The thermoplastic material has: has a crystallization half time of >30 s and 50° C.; a peak melt temperature Tp,m of >200° C.; an extrapolated first heating run melt onset temperature T ei,m of >5° C. above the extrapolated first cooling run crystallization end temperature Tef,c; and a degree of crystallinity of >10.0%. The polymer composition has a continuous use temperature of >100° C., and a low change of molecular weight during exposure to selective laser sintering processing temperatures.