阅读说明：本技术 三维打印 (Three-dimensional printing ) 是由 K·J·埃里克森 P·奥卢班莫 A·哈特曼 L·赵 于 2018-03-15 设计创作，主要内容包括：一种三维打印系统可包括聚合物构建材料和一种或多种可喷射流体。聚合物构建材料可具有20μm至150μm的平均粒度、第一熔体粘度和75℃至350℃的熔融温度。在一个实例中,可喷射流体可包含水、0.1重量％至10重量％的电磁辐射吸收剂和10重量％至35重量％的有机溶剂增塑剂。使聚合物构建材料层的第一部分与可喷射流体接触可提供基于聚合物构建材料含量计2重量％至10重量％的有机溶剂增塑剂载量。可降低位于第一部分的聚合物构建材料的第一熔体粘度,并可将位于第一部分的聚合物构建材料的熔融温度降低3℃至15℃。(A three-dimensional printing system may include a polymeric build material and one or more ejectable fluids. The polymer build material can have an average particle size of 20 μm to 150 μm, a first melt viscosity, and a melting temperature of 75 ℃ to 350 ℃. In one example, the jettable fluid may include water, 0.1 wt% to 10 wt% of an electromagnetic radiation absorber, and 10 wt% to 35 wt% of an organic solvent plasticizer. Contacting the first portion of the layer of polymeric build material with the jettable fluid can provide an organic solvent plasticizer loading of 2 wt% to 10 wt% based on the polymeric build material content. The first melt viscosity of the polymer build material located in the first portion can be reduced, and the melting temperature of the polymer build material located in the first portion can be reduced by 3 ℃ to 15 ℃.)