FORMULATION, QUALITY, CLEANING, AND OTHER ADVANCES IN INKJET PRINTING
FORMULATION, QUALITY, CLEANING, AND OTHER ADVANCES IN INKJET PRINTING
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DOI：
10.1615/atomizspr.2020034559
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发表时间：
2021-01-01
影响因子：
1.2
通讯作者：
Castrejon-Pita, J. R.
中科院分区：
文献类型：
--
作者：
Castrejon-Pita, A. A.;Betton, E. S.;Castrejon-Pita, J. R.
本文介绍了喷墨界在寻求提高材料兼容性、打印质量和可靠性方面所进行的一系列现代发展。流变学的最新进展增进了我们对喷墨打印过程的时间尺度上的液体特征的理解。因此，微秒流变学现在允许配制具有定制粘度的油墨，该粘度根据其动态的时间尺度而变化；喷射时有效粘度低，但破碎和着陆时有效粘度高。这些进步使得业界能够根据线性或非线性粘弹性和其他流体特性来评估并经常预测给定打印频率下的喷墨行为。流体系统和波形设计的进步现在已经能够打印以前无法按需喷射的高粘度墨水。这种能力为喷墨技术开辟了新的市场和机遇，从胶水印刷到高负载陶瓷墨水的使用。打印头设计和使用通用标准评估打印图案的进步现在允许工业规模数字喷墨打印在各种环境中进行可验证和可靠的操作。最近对打印头清洁协议的改进通过减少打印头区域附近的雾和卫星液滴的产生，有助于提高打印速度和操作时间。由于这些改进，喷墨技术正在图形、包装和标签等大型市场中取代胶印和丝网印刷等传统技术。
This article describes a series of modern developments carried out by the inkjet community in its quest to improve material compatibility, printing quality, and reliability. Recent progress in rheology has advanced our understanding of liquids at time scales characteristic of inkjet printing processes. As a result, microsecond rheology now permits the formulation of inks with tailored vis-cosities that vary according to the time scale of their dynamics; that is low effective viscosity during jetting but high at breakup and landing. These advances have permitted the community to assess, and often predict, ink jetting behavior, at a given printing frequency, based on the linear or non-linear viscoelasticity and other fluid characteristics. Advances in fluidic systems and in waveform design have now enabled the printing of high viscous inks that were previously impossible to jet on demand. This capability is opening up new markets and opportunities for inkjet, from the printing of glues to the use of heavily loaded ceramic inks. Advances in printhead design and the assessment of printing patterns using common standards now allow the verifiable and reliable operation of industrial-scale digital inkjet printing in a wide range of environments. Recent improvements on printhead cleaning protocols have contributed to an increase in printing speed and operating time by reducing the production of mist and satellite droplets neighboring the printhead region. Thanks to these improvements, inkjet is displacing traditional technologies such as offset and screen printing in large markets including graphics, packaging, and labeling.