凹胶印刷电子油墨铺展过程分析及实验

目的为清晰直观地认识凹胶印刷电子油墨铺展过程的微观机理。方法根据油墨铺展运动过程,建立其静态的物理和几何模型,利用幂律流体理论,分析油墨粘度与剪切速率之间的关系,特别是纳米银导电油墨的幂律流体函数模型,最后利用实验验证这一模型的正确性。结果幂律流体理论表明,纳米银导电油墨的粘度与剪切速率存在η=198.3×γ^0.8189-1的数量关系,实验结果表明,在印刷压力为49 N,线宽扩大率最大时,印刷速度为21.88 mm/s,验证该条件下的方阻值为5.915Ω,在印刷速度为45 mm/s,线宽扩大率最大时,印刷压力为49.36N,验证该条件下的方阻值为5.908Ω,在印刷压力为49N,印刷速度为45 mm/s下,线宽扩大率最大时,油墨粘度为0.78 Pa·s,验证该条件下的方阻值为4.8998Ω,油墨粘度η与印刷速度v之间存在v/478.93·e^-v^2/957.86=η/0.6097·e^-η^2/1.2194的函数关系。结论纳米银导电油墨是一种假塑性流体,其粘度与剪切速率呈负相关变化,剪切速率是影响油墨铺展过程的关键参数。

新型盲文点胶印刷机

2008年9月10日，当我站在我们自己的新型盲文打印机前向国务院回良玉副总理、科技部曹建林副部长等领导介绍我们自行研制的设备时，我再次感到了科研人员强烈的责任感。

PVC树脂印刷胶的研制

ＰＶＣ树脂印刷胶是一种新型胶料，用它制成的印刷胶棍具有传墨性能优良，使用寿命长，耐候性好，可再生复制等优点，且生产工艺简单。

植物SOD生产技术及制备方法印刷胶简易生产技术

“SOD”即超氧化物歧化酶，简称SOD。它是一种重要的氧自由基的主要清除剂，具有很强的抗氧化能力：作为药物在美国、德国、日本、加拿大、澳大利亚、法国等先进工业国有较为广泛的应用。目前在临床应用上，对消除炎症、抗病毒及增强免疫力，特别是对类风湿关节炎及放射性治疗后引起皮肤炎症有疗效：更值得一提的是SOD在防止癌细胞扩散和作为抗衰老的药物已引起医药界人士的极大兴趣。

光碟四色印刷(一)

光碟上图纹的彩色印刷90%左右是用丝网印刷工艺完成的。由于光碟的发展,光碟不单只有CD、VCD,近年来出现了DVD,以及CD-R等,因此,光碟上的图文除了用丝网印刷外,为了保证播放功能,以及更高的图、声、画质量要求,光碟表面画面装饰就需要采用平板胶印刷,或是将钢丝刷与胶版印刷相结合,让这两种印刷方法运用在同一光碟上,发挥各自的特点,获得最好的视觉效果,与此同时,正确选择、应用好印刷油墨,让所有油墨对DVD、CD-R类光碟播放性能的影响尽可能地减小,使光碟播放中达到声、像、彩色及表面装饰画面还原设计要求。光碟质量除了光碟本身的制像等质量外,其外表印刷中,例如丝网印刷中的网材选用与网模板的制作方法会影响表面装饰画面印刷效果,印刷油墨的选择,在丝网印刷或胶版印刷中对光碟播放质量有很大的影响,因此,这里就光碟表面彩色图文装饰印刷方面的有关问题从印刷技术上进行讨论,相信这些问题对光碟印刷行业的从业人员有所借鉴。

平版印刷机自动化控制调试与维护

目前,印刷机电气控制发展迅速,其自动化程度逐渐完善。本文具体分析印刷机的自动控制与调试维护,并以平板印刷机为例对其进行详细介绍。

Calculation of impact factor of vibrator oscillation in offset printing based on fuzzy controller and genetic algorithm

In the inking system of an offset printing press,a vibrator roller distributes ink not only in the circumferential direction but also in the axial direction.In the control process,if ink amount is determined only by the dot area coverage without considering the impact of vibrator roller's oscillation,the printing colour quality will be reduced.This paper describes a method of calculating the impact factor of vibrator roller' s oscillation.First,the oscillation performance is analyzed and sample data of impact factor is got.Then,a fuzzy controller used for the calculation of the impact factor is designed,and genetic algorithm is used to optimize membership functions and obtain the fuzzy control rules automatically.This fuzzy controller can be used to calculate impact factors for any printing condition,and the impact factors can be used for ink amount control in printing process and it is important for higher printing colour quality and lowering ink and paper waste.

The multi-motion-overlap algorithms for minimizing the time between successive scans of wafer stage

In order to optimize the transitional time during the successive exposure scans for a step-and-scan lithography and improve the productivity in a wafer production process, an investigation of the motion trajectory planning along the scanning direction for wafer stage was carried out. The motions of wafer stage were divided into two respective logical moves （i. e. step-move and scan-move） and the multi-motionoverlap algorithms （MMOA） were presented for optimizing the transitional time between the successive exposure scans. The conventional motion planning method, the Hazelton method and the MMOA were analyzed theoretically and simulated using MATLAB under four different exposure field sizes. The results show that the total time between two successive scans consumed by MMOA is reduced by 4.82%, 2.62%, 3.06% and 3.96%, compared with those of the conventional motion planning method; and reduced by 2.58%, 0.76%, 1.63% and 2.92%, compared with those of the Hazehon method respectively. The theoretical analyses and simulation results illuminate that the MMOA can effectively minimize the transitional step time between successive exposure scans and therefore increase the wafer fabricating productivity.

标签印制新材料和新工艺的应用

标签行业的发展离不开设备的更新换代,设备的技术先进性决定了标签整体产业发展前景。当一家公司投入大量资金购买了最先进的设备后,短期内产品的创新就要依靠工艺设计和新材料的选用。