The influences of diantimony trioxide (Sb₂O₃) on the laser-marking properties of thermoplastic polyurethane (TPU) are studied. The TPU/Sb₂O₃ composites are prepared by melt blending in a HAAKE mixer. A neodymium-doped yttrium aluminum garnet (Nd:YAG) pulsed laser beam of a wavelength of 1064 nm is used to scan the surfaces of the composites to create markings. Visual and microscopic analyses of the TPU/Sb₂O₃ composites after laser treatment show high-contrast black markings, depending on the Sb₂O₃ loading, Sb₂O₃ particle size, and laser-beam power. The laser-marking properties of the composite surfaces are analyzed by X-ray diffraction, Raman spectroscopy, and thermogravimetric analysis. Furthermore, a mechanism for the laser-induced darkening of the TPU/Sb₂O₃ composites is proposed. The Sb₂O₃ particles absorb laser energy and convert it into thermal energy. This causes the surrounding TPU matrix to carbonize into amorphous carbon, forming black markings.

研究了三氧化二锑（Sb ₂ O ₃）对热塑性聚氨酯（TPU）激光刻印性能的影响。通过在HAAKE混合器中熔融共混来制备TPU / Sb ₂ O ₃复合材料。波长为1064 nm的掺钕钇铝石榴石（Nd：YAG）脉冲激光束用于扫描复合材料的表面以形成标记。激光处理后的TPU / Sb ₂ O ₃复合材料的视觉和微观分析显示出高对比度的黑色标记，具体取决于Sb ₂ O _3的负载量，Sb ₂ O ₃粒径和激光束功率。复合表面的激光刻印特性通过X射线衍射，拉曼光谱和热重分析进行分析。此外，提出了一种TPU / Sb ₂ O ₃复合材料的激光诱导变黑机理。Sb ₂ O ₃颗粒吸收激光能量并将其转换为热能。这导致周围的TPU基质碳化成无定形碳，形成黑色标记。