Selective laser sintering composition and selective laser sintering 3d printing method employing the same

A selective laser sintering composition, comprising:

• a nanoscale inorganic powder having a particle size distribution D90 of 1 nm to 950 nm;
• and
• a thermoplastic vulcanizate powder, wherein the temperature difference (ΔT) between the onset temperature for melting the thermoplastic vulcanizate powder and the onset temperature at which the thermoplastic crystallizes vulcanizate powder is greater than or equal to 10° C., and the thermoplastic vulcanizate powder has a particle size distribution D90 of 40 82 m to 100 82 m,
• wherein the thermoplastic vulcanizate powder includes:
• a thermoplastic, wherein the temperature difference (ΔT) between the onset temperature for melting the thermoplastic and the onset temperature at which the thermoplastic crystallizes is greater than or equal to 10° C.;
• and
• a crosslinked polymer, wherein the crosslinked polymer is a crosslinked rubber, a crosslinked thermoplastic elastomer, or a combination thereof, and wherein the thermoplastic and the crosslinked polymer have a weight ratio of 1:1 to 1:4.