水性油墨制备工艺探讨

本文论述了水性油墨的制备工艺、配方、质量指标、使用要求，讨论了投料依据。用本技术配方制备的水性油墨，物理性能良好，质量稳定，能满足目前胶版凸印机的使用要求。     

陶瓷墨水的制备技术

本文介绍了喷墨打印装饰技术在陶瓷行业中的应用,以及喷墨墨水的制备工艺。通过分析目前常用的陶瓷喷墨墨水的制备方法有分散法、溶胶-凝胶法、反相微乳液法,以及提出使用过渡金属配合物溶于水或有机溶剂中制备更加稳定墨水的方法。     

D相乳化法制备油墨清洗剂

本文主要介绍了用D相乳化法制备一种特效油墨清洗剂，并对清洗剂性能进行了探讨，这种清洗剂主要成分由烷基酚聚氧乙烯醚、环保油溶剂、十二烷基苯磺酸钠以及水等组成。清洗剂为中性，主要用于清洗印刷操作工手上所沾油墨。这种清洗剂对人体皮肤无伤害，去油墨效果非常显著，且无毒无污染，价格低廉，制作简单，使用方便。     

Deducing ink thickness variations by a spectral prediction model

Most existing techniques for regulating the ink flow in offset presses rely on density measurements carried out on specially printed patches. In the present contribution, we develop a methodology to deduce ink thickness variations from spectral measurements of multichromatic halftone patches located within the printed page. For this purpose, we extend the Clapper‐Yule spectral reflectance prediction model by expressing the transmittance of the colorants composed of superposed inks as a function of the ink transmittances and of fitted ink layer thicknesses. We associate to each ink an ink thickness variation factor. At print time, this ink thickness variation factor can be fitted to minimize a difference metric between predicted reflection spectrum and measured reflection spectrum. The ink thickness variations deduced from multichromatic halftones allow to clearly distinguish between normal ink volume, reduced ink volume, or increased ink volume. This information can then be used for performing control operations on the printing press. © 2009 Wiley Periodicals, Inc. Col Res Appl, 34, 432–442, 2009     

热分解乳化剂合成及在喷墨CTP中的应用

合成了2个可以热分解失去再乳化作用的表面活性剂,十二、十八烷基酸没食子脂酸钠,表征了结构。试验了与K12(十二烷基硫酸钠)相比对苯乙烯、26#白油的乳化能力,其乳化性能高于K12,苯乙烯乳化能力是K12的2.17倍,测定了CMC为0.267×10-3mol/L,γCMC为48.0 mN/m。TG/DTG研究了乳化剂的热分解性能。氮气流中,150.02℃开始分解,260℃分解速率最大。在150℃烘箱中30 s表面活性剂粉末即热分解失去亲水基团。应用在喷墨微滴珠液中喷涂在经电解氧化的铝版基上,热处理30 s,温度200℃,涂膜接触角达到120(°)基本恒定。制成的喷墨CTP版,在胶印机上进行了印刷,耐印率达到2万印。分辨率取决于喷墨打印机。     

Preparation of high‐tack value adhesive for offset printing inline cold foil stamping and its performance characterization

A high‐tack‐value adhesive for offset printing inline cold foil stamping was prepared using rosin‐modified phenolic resin, terpene resin, industrial soybean oil, and solvent oil. The prepared adhesive can overcome the low accuracy of cold foil stamping and reproduction of existing conventional adhesives. The tack value, viscosity, ink (adhesive) thread length, ink flow, viscoelasticity, thixotropy, emulsification rate, and solid content of the prepared adhesives were characterized. The adhesive was applied on a MAN ROLAND 700 eight‐color offset printing cold foil stamping press. Stamping quality was evaluated. Results showed that the prepared adhesive has high tack value and the increment of the tack value is small with increasing test time. To achieve good stamping quality, the tack value of the adhesive should be controlled between 20 to 30, and its viscosity and emulsification rate should be kept at approximately 80 Pa·s and within the range of 30% to 40%, respectively. Appropriate levels of viscoelasticity, thixotropy, and ink flow were also necessary. POLYM. ENG. SCI., 59:139–144, 2019. © 2018 Society of Plastics Engineers     

微乳液型油墨清洗剂的研制

为克服传统溶剂型油墨清洗剂易燃易爆、污染环境等缺点,以复配表面活性剂、溶剂、水及其它助剂制备了一种微乳液型油墨清洗剂,对微乳液稳定性等及油墨去污率进行了测定,研究了不同温度及时间对油墨清洗效果的影响。结果表明,常温下使用时,微乳液型清洗剂的油墨去除率达95%以上,最佳清洗温度为25～40℃,最佳清洗时间为15 min,具有安全性能高、清洗能力强、防锈缓蚀性好及环境友好等特点。     

Investigation of lint particle adhesion in offset printing using Weibull statistics

Linting is one of the biggest concerns for the newspaper printing industry. In the offset printing process, lint particles from the paper are removed from the paper surface under the force of the tacky ink, adhere to the printing blanket and disrupt the transfer of ink, causing deterioration in image quality and affecting the pressroom productivity. This paper deals with the bond strength of the lint particles released from the paper substrate and printing blanket surface. The strength distribution of lint particles was characterised in order to study the dynamics of linting. The dynamics was modelled using a system with two first-order rate equations. Weibull statistics were used to describe the particle size distribution of the lint collected after the sheet-fed printing trials. In this investigation, the lint samples were collected by washing the lint from the printing blanket, filtering and performing image analysis to measure the particles. In order to analyse the data, the lint particle size was set as an independent variable. The number of small particles removed is as expected much higher than the number of larger particles. When the ink tack is increased and thus also the force working on the lint particles, then the relative increase in large particles is higher than the number of small particles. The removal rate of particles from the printing blanket is independent of particle size indicating that both the adhesion force between particles and blanket and the removal force due to ink tack is proportional to the particle area.     

幂律油墨在纸张中渗透深度的计算与实验

利用一维渗流方程导出了印刷过程中幂律油墨渗透深度随印压和印刷速度(印压时间)的变化关系,由渗透深度测量值和所推幂律油墨渗透深度公式计算了幂律油墨在几种型号纸张中渗透率与纸张孔隙度的比值(渗孔比). 改变印压和印刷速度,由幂律油墨渗孔比,利用幂律油墨渗透深度公式对油墨渗透深度进行了估算,结果与实验测量值吻合得很好.     

Resistance variation of conductive ink applied by the screen printing technique on different substrates

This research study focuses on the application of conductive ink by the screen printing technique to evaluate the potential of creating printed electrodes and to investigate the effect of washing upon electrical resistance and flexibility. Two conductive inks were applied by a conventional screen printing method on four different textile substrates, 100% cotton, 50%/50% cotton/polyester, 100% polyester and 100% polyamide. The inks were also applied on a multifibre fabric. Atmospheric plasma treatment was applied to improve the adhesion to the samples, and the resistance values were compared with those of non‐treated samples. The values were measured before and after cleaning and washing tests, which were performed to simulate domestic treatment for garments to predict the behaviour of the inks after normal usage of the fabrics. Comfort properties like stiffness of the fabrics were also evaluated after five and 10 washing cycles. It was observed that PE 825 ink forms a thicker film on the fabric surface, contributing to the loss of flexibility of the textile. However, PE 825 ink also produced the best results in terms of durability and lower values of resistance. Polyamide fabrics lost their conductive property after five washing cycles due to weak bonding between the ink and the fibres, whereas cotton fibres provided the best results.     

喷墨打印技术的发展现状

简要介绍了喷墨打印技术的发展现状。目前主要有两类喷墨打印技术:连续喷墨打印和脉冲喷墨打印技术。前者可设计成双重或多重弯曲系统;后者可分为热喷墨、压电喷墨、阀门喷墨、静电喷墨过程,描述了喷墨打印用墨的最新发展。水性、溶剂性、热熔性、紫外固化和反应性墨是目前主要的喷墨打印用墨。     

水性丙烯酸酯树脂的合成和应用

以甲基丙烯酸丁脂、丙烯酸2-乙基已酯、丙烯酸为原料在引发剂存在下,合成水性丙烯酸酯树脂,并与水性三聚氰氨树脂复配,制得水溶性软管滚涂油墨经过软管厂涂装试用,性能指标达到现用油溶性软管滚油墨的效果。     

Single‐phase ink‐jet printing onto cotton fabric

The current commercial application of ink‐jet reactive inks to cotton fabrics requires pretreating with pad liquor containing a thickener, urea and alkali prior to printing. In this study, attempts have been made to develop a reactive ink‐jet print in a single‐phase process by adding an organic salt to the ink formulation and hence removing the need to pretreat fabrics. This approach utilises inks containing both a reactive dye, in this case Procion Red H‐E3B, and an organic salt such as sodium formate, sodium acetate, sodium propionate or tri‐sodium citrate. The behaviour of a novel reactive ink formulation for ink‐jet printing on to cotton fabric was evaluated at different pH vlaues. The results at optimum pH indicated that printed non‐pretreated fabrics with ink containing organic salts exhibited a higher level of reactive dye fixation than printed pretreated fabric containing no organic salt ink. The yielded prints demonstrate excellent colour fastness to washing and dry/wet crocking properties. The light fastness of the printed fabrics was improved by adding an organic salt to the ink formulation.     

聚乙烯用高性能水基喷码油墨的研制

将马来酸酐接枝改性的氯化聚丙烯树脂(CPP-g-MAH)溶于乙酸丁酯中,再加入由Tween-20和Span-80组成的复合乳化剂进行乳化,获得了稳定的CPP-g-MAH乳液。研究了CPP-g-MAH乳液、丙烯酸复配树脂RX、乙二醇以及表面活性剂Surfynol465的用量对喷码油墨体系稳定性和墨层在聚乙烯(PE)表面附着力的影响,确定了较佳的乳化条件为:Tween-20与Span-80质量比3:2,Tween-20与Span-80的总质量为CPP-g-MAH质量的12%。较佳的水基喷码油墨配方(以质量分数表示)为:CPP-g-MAH乳液30%,水溶性丙烯酸树脂RX2%,乙二醇15%,Surfynol4651.5%。在此条件下制取的水基喷码油墨在PE表面的附着力达1.04N/mm2,非常适合于PE制品表面的喷码打印。     

陶瓷喷墨打印技术的现状与展望

2010年全球瓷砖产量由2009年的85.15亿平方米增长为95.12亿平方米,繁荣的景象让人对全球陶瓷行业的发展前景充满期望。瓷砖印刷方法的的重要转变的一个关键因素就是数字技术,主要表现形式就是喷墨印刷,本文主要阐述陶瓷喷墨打印技术的现状和关键技术问题。     

二聚脂肪酸在聚酰胺型水性油墨连接料合成中的研究进展

二聚脂肪酸具有特异的分子结构和特性,可生成许多衍生物,其中聚酰胺树脂是最重要的一种,且由聚酰胺树脂所制备的油墨具有良好的溶解性、耐腐蚀性、亲水性等优良性能。本文主要介绍了二聚酸基聚酰胺树脂的特性,及其在油墨连接料合成中的应用研究,并展望了其发展前景。     

环保乳化速印油墨研制分析

环保乳化生产的油墨,是以少量的油包大量的水而形成的稳定的W/O型乳状液,并且具有良好的油墨的基本性能和印刷性能,甚至优于油性油墨的印刷性能。这样生产的油墨,含水率高,工艺简单、安全性好。用大量的水代替油,不仅有着突出的经济效益,而且社会效益也相当显著。对油墨行业起着很好的引导作用,是未来油墨行业的发展方向。所有的原料均无毒,是非常好的绿色产品。     

Effect of liquid droplet impact velocity on liquid wicking kinetics in surface V-grooves

The liquid droplet inertia effect on liquid wicking in V-groove has direct implications to the liquid sample flow in microfluidic devices using V-groove channels and to the ink wicking along the inter-fibre gaps on uncoated paper surfaces, which is critical to the ink jet print quality. In this study liquid droplet inertia and the V-groove geometry is systematically varied to understand the effect of droplet impact, V-groove apex angle and groove width on the liquid wicking rate in the groove. Our results show that both the apex angle and the groove width influence the rate of liquid wicking in V-grooves forced by liquid droplet inertia. The inertia effect lasts for only a short time and its influence to the sample delivery accuracy in V-groove microfluidic devices can be minimised or eliminated by improving microfluidic channel design. On improving ink jet printing quality of uncoated papers, this work shows that applying surface sizing to uncoated ink jet papers is likely to be an effective way to change the geometry of the inter-fibre gaps and therefore can reduce the feathering effect in ink jet printing.     

一种水基型洗网水的研制

丝网印刷用途广泛,在使用过程中经常要对丝网上的油墨进行清洗。目前市场上,清洗丝网的常用清洗剂(洗网水)主要成份均为有机溶剂,闪点低,在使用过程或是仓储、运输过程中都存在一定的安全隐患;并且有机溶剂的有机挥发物(VOC)对环境污染也较大。本项目研制的洗网水以水作为主要成份,其余成份为氢氧化钾2%、甲醇7%、乙二醇丁醚30%、LF221为3%、JFC为1%,该洗网水对丝网无腐蚀,清洁效果好,环保经济,并且安全。     

陶瓷喷墨打印成型技术进展

陶瓷喷墨打印成型技术是一种把计算机辅助制造(CAM)应用于陶瓷成型中的新技术.它是在计算机控制下多层打印逐层叠加制出三维陶瓷坯体.它在复杂单体陶瓷制造、有序成分复合材料制造,固体氧化物燃料电池制造等方面有很好的应用前景.本文概述了陶瓷喷墨打印技术的进展状况.着重介绍了该技术的历史原理设备和陶瓷墨水性能要求,以及现存的问题.