Direct observation of microcontact behaviours in pattern-generation step of reverse offset printing
Direct observation of microcontact behaviours in pattern-generation step of reverse offset printing
复制标题
直接观察反向胶印图案生成步骤中的微接触行为
DOI：
10.1088/0960-1317/27/1/015003
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发表时间：
2016
影响因子：
2.3
通讯作者：
H. Ushijima
中科院分区：
文献类型：
--
作者：
Y. Kusaka;Shusuke Kanazawa;N. Yamamoto;H. Ushijima
在这项研究中，我们调查的静态和动态方面的辊到表型反向胶印过程中形成的压区。首先，我们表明，几种模式的屋顶倒塌（底部接触缺陷）可以形成取决于聚（二甲基硅氧烷）（PDMS）毯的厚度和图案的大小。我们调节的表现形式的缺陷模式驱动的不可压缩的PDMS的局部堆积，建模的接触力学配方，连同一个互补的数值模拟。在动态方面，我们首先在印刷期间区分静态压区和动态压区，其中宽度通过橡皮布PDMS的动力学控制的粘附力来扩展。此外，我们观察到，取决于图案结构，有空间偏差的微观接触和随后的分离行为的铅版从一个宏观上可识别的辊隙，因此，局部脱离率是异构的图案生成过程中的反向胶印，即使在一个恒定的机器速度。此外，我们发现，在高速图案化条件下油墨转移失败的图案部分对应于在直接观察期间发现的局部增强的脱离速率的区域。
In this study, we investigate the static and dynamic aspects of the nip formed during roll-to-sheet-type reverse offset printing. First, we show that several modes of roof collapses (bottom contact defects) could be formed depending on the poly(dimethylsiloxane) (PDMS) blanket thickness and pattern size. We regulate the manifestation of the defect modes driven by the local pile-up of the incompressible PDMS, as modelled by the contact mechanics formulation, together with a complementary numerical simulation. In dynamics, we first differentiate between the static nip and dynamic nip during printing, where the width is extended by the kinetically controlled adhesion of the blanket PDMS. Further, we observe that depending on the pattern structure, there was spatial deviation of the microscopic contact and subsequent separation behaviours of the cliché from a macroscopically recognizable nip, and consequently, local detachment rates were heterogeneous in the pattern-generation process of the reverse offset printing, even with a constant machine speed. In addition, we found that the parts of a pattern where the ink transfer fails in a high-speed patterning condition corresponded to the region of the locally enhanced detachment rates found during direct observation.