▎ 摘　　要

NOVELTY - Near-infrared reflective complex material comprises 90-100 pts. wt. polymer powder, 0.1-10 pts. wt. near-infrared reflective filler, 0.1-1 pts. wt. flow modifier, and 0.1-5 pts. wt. other fillers. USE - The complex material is useful for inkjet 3D printing. ADVANTAGE - The complex material has a near-infrared reflection function and can be directly applied to inkjet 3D printing using near-infrared as a processing energy source. The method can prevent the powder bed from softening or melting and agglomerating during the printing process, improves the accuracy and strength of the printed product, and saves costs. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing a near-infrared reflective complex material for inkjet 3D printing comprising (i) performing mechanical blending method, specifically comprising placing 90-100 pts. wt. polymer powder, 0.1-10 pts. wt. near-infrared reflective filler, 0.1-1 part flow modifier, 0.1-5 pts. wt. other fillers in a high-speed mechanical blending mixer, mixing at a speed of 300-15000 revolutions/minute for 10-30 seconds and stirring 3-10 times and each time with an interval of 5-30 seconds, (ii) performing solution coating method, specifically comprising stirring 90-100 pts. wt. polymer powder, dispersing in ethanol for 1 hour, adding 0.1-5 pts. wt. near-infrared reflective filler, continue to stirring for 2 hours, uniformly adsorbing the near-infrared reflective filler on the polymer powder particles due to electrostatic interaction, filtering, drying, mechanically blending the coated near-infrared reflective filler with other modifiers, and (iii) performing melt blending method, specifically comprising extruding 90-100 pts. wt. polymer powder, 0.1-10 pts. wt. near-infrared reflective filler, 0.1-1 pts. wt. flow modifier, 0.1-5 pts. wt. other fillers and granulating by a single-screw extruder, and cryogenically pulverized to obtain complex powder.