Formulation, characterisation and flexographic printing of novel Boger fluids to assess the effects of ink elasticity on print uniformity

Formulation, characterisation and flexographic printing of novel Boger fluids to assess the effects of ink elasticity on print uniformity
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新型博格流体的配方、表征和柔版印刷,以评估油墨弹性对印刷均匀性的影响

DOI:
10.1007/s00397-017-1061-9
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发表时间:
2017
期刊:
影响因子:
2.3
通讯作者:
Morgan M
Morgan M
中科院分区:
工程技术3区
文献类型:
--
作者:
Morgan M

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配制了模型弹性油墨,并通过柔版印刷对剪切和拉伸的流变性进行了表征,以评估油墨弹性对印刷均匀性的影响。柔性版印刷是一种在大规模生产印刷电子产品中具有巨大潜力的卷筒印刷工艺,了解层的均匀性和流变学的影响是至关重要的。通过将聚乙烯醇和高相对分子质量的聚丙烯酰胺混合,制成了一套可柔印的新型博格液,以提供不同弹性的油墨。在打印试验期间,在所有打印中都观察到了粘性指进现象,牛顿油墨在打印方向上显示出连续的条纹。弹性的增加显著影响了这种连续性,破坏了这种连续性,并导致指纹手指特征总体相对尺寸的可量化减少。因此,油墨弹性被认为对柔版印刷的均匀性有深远的影响,表明油墨的流变性调节可能是获得特定印刷特征的一种途径。
Model elastic inks were formulated, rheologically characterised in shear and extension, and printed via flexography to assess the impact of ink elasticity on print uniformity. Flexography is a roll-to-roll printing process with great potential in the mass production of printed electronics for which understanding layer uniformity and the influence of rheology is of critical importance. A new set of flexo-printable Boger fluids was formulated by blending polyvinyl alcohol and high molecular weight polyacrylamide to provide inks of varying elasticity. During print trials, the phenomenon of viscous fingering was observed in all prints, with those of the Newtonian ink exhibiting a continuous striping in the printing direction. Increasing elasticity significantly influenced this continuity, disrupting it and leading to a quantifiable decrease in the overall relative size of the printed finger features. As such, ink elasticity was seen to have a profound effect on flexographic printing uniformity, showing the rheological tuning of inks may be a route to obtaining specific printed features.
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