UV油墨固化窗口的探索

UV油墨固化的基本条件就是在一定的紫外光照射下激活油墨配方中的光引发剂生成自由基,进而引发整个油墨的化学反应实现油墨固化。UV油墨组成中含有的连接料、颜料、助剂、引发剂等成分都会竞争吸收紫外光,因此探索设计一个紫外光可以最大程度被光引发剂吸收的窗口是实现UV油墨高效固化的关键。     

复合光引发剂对UV油墨固化速度影响的研究

选用了 6种光引发剂进行复合配制黑色丝印UV油墨 ,实验结果表明 ,用复合光引发剂比用单一光引发剂配制UV油墨的固化速度快 ;在复合光引发剂中 ,应选择吸收光谱与颜料的吸收光谱相匹配的光引发剂 ,以及吸收光谱与光源发出的主波长较一致的光引发剂 ;另外 ,油墨中复合光引发剂含量应适量 ,这些对提高UV油墨的固化速度都有很大的帮助。     

UV自由基固化和阳离子固化油墨的比较试验

根据固化机理,UV固化油墨主要有自由基型和阳离子型两种。对自由基固化和阳离子固化油墨进行了对照试验,进行了自由基光引发剂的筛选,并考察了两者固化涂层的性能、温度对固化速度的影响及作为UV固化油墨的优缺点,并从理论上进行了分析。     

紫外光固化木器油墨的研制

本研究了颜料、单体及光引发剂的含量和齐聚物的种类对UV固化木器油墨的固化速度、硬度、附着力、耐磨损性的影响。结果表明，合理搭配使用各种组分能得到综合性能优异的UV固化木器油墨。     

UV固化涂料

UV固化反应属于能量引发聚合反应,在光引发剂存在下,成膜物经自由基反应几秒钟可形成交联固化涂膜.UV固化涂料可分为水性UV 固化涂料、UV固化粉末涂料和溶剂型UV固化涂料.本文重点介绍UV固化涂料的固化体系,UV固化粉末涂料、水性UV固化材料和溶剂型UV固化涂料.     

近年来辐射固化材料的研究进展

综述了光化学、光自由基聚合、光引发剂UV固化、UV固化剂、电沉积光敏抗蚀剂和涂料、UV水基和粉末涂料及UV固化纳米复合材料的研究进展。     

光引发剂与颜料对喷墨印花用UV固化油墨固化速度的影响

制备了含有品红颜料的喷墨印花用聚氨酯丙烯酸酯油墨的UV固化油墨为.选择了7种光引发剂,在实验条件下测试了其固色速度(时间)为1.97～8.65秒,当引发剂的含量为6%时,固化速度达到最大;当有机颜料的含量由1%上升到5%时,固化时间也由不足1秒上升为6秒.实验结果表明,颜料在油墨中的最佳含量为3%.     

引发剂对UV油墨固化速度影响的研究

为提高UV油墨的固化速度,研究了羟烷基苯酮类1173、胺烷基苯酮类907、酰基磷氧化物类819、二苯甲酮类BP、硫杂蒽酮类ITX 5种引发剂及复配对UV油墨固化速度的影响。结果表明,引发剂浓度为2%,颜料浓度为4%,单体浓度为30%时,引发剂1173、BP的固化时间分别为20.88 s和70.56 s,引发剂907的光固化时间为7.14 s,引发剂819和ITX的光固化时间均可达到1.5 s。引发剂1173与BP进行1∶3复配时,固化速度是BP的4.9倍;引发剂907与BP进行1∶3复配时,固化速度是BP的4.3倍;引发剂ITX与907进行1∶1复配时,固化速度是907的2.3倍。     

UV固化胶粘剂的研究进展

介绍了UV固化胶粘剂的组成,包括预聚体、活性稀释剂、光引发剂以及助剂等,综述了UV固化胶粘剂研究进展,指出了UV固化胶粘剂的发展趋势.     

UV 固化涂料固化后黄变的探讨

UV 固化涂料固化后会出现黄变,尤其在白色或浅色基材上更加明显.针对上述问题,文章通过测量漆膜固化后放置不同时间的△b值,分析了几种单体、树脂、光引发剂、紫外光吸收剂及受阻胺光稳定剂等对此黄变的影响.通过试验可以看出,影响UV固化涂料固化后黄变特性的因素有UV低聚体(UV树脂)、单体、光引发剂及助剂.然而UV固化涂料固化后的黄变会随着放置时间的推移逐渐衰减,通常24 h后会趋于稳定,并且可以通过烘烤来加速颜色稳定的过程.     

Low VOC, low viscosity UV cationic radiation-cured ink-jet ink system

Ink-jet inks need to be very low in viscosity to transport the ink through the jet nozzle as well as for drop formation and integrity. The objective of this project was to demonstrate UV-cured systems for ink-jet inks and coatings with zero volatile organic compounds and very low viscosity. Cycloaliphatic epoxy systems were selected as binders of choice for this project due to their low viscosity and ability to be cured using UV-cationic photoinitiators. UV-curable coatings and inks with zero VOC and less than 10 cPs viscosities were formulated using exempt solvent acetone and vinyl cyclohexene diepoxide. UV-curable inks with up to 10% black dye were formulated. Rapid cure was achieved through the use of aryl sulfonium salts of hexafluorophosphoric acid. The presence of dye inhibited the reaction, but adequate cure of dyed formulations was achieved by increasing the concentration of the photoinitiator. Coatings Research Institute, 430 W. Forest Avenue, Ypsilanti, MI 48197.     

印刷纸张用紫外光固化水性上光油的制备研究

研究了纸张用紫外光(UV)固化水性上光油低聚物共聚单体的配方、引发剂种类和用量及反应条件,合成了水性上光油低聚物,在此基础上与活性稀释剂、光引发剂等复合制备了纸张用紫外光固化水性上光油,研究了其组成和性能指标,优化出了光固化速率适宜、性能良好的水乳性紫外固化涂料。研究结果表明:当该复合涂料中光引发剂2959的用量为3%、活性稀释剂的质量为乳液质量的40%、附着力促进剂含量为0.6%时涂层光固化时间最短,涂膜综合性能最好。最终制得了光泽度佳、光滑、耐磨、紫外固化速率较快的水性上光油。     

紫外光固化胶印油墨固化速度研究

研究了颜料体系,引发体系和工艺条件对紫外光固化胶印油墨固化速度的影响,得出了与紫外光源和颜料相适应的引发速度较快的引发体系组合。     

Syntheses of new black dyes for ink-jet inks

Drop-on-demand ink-jet inks made from dyes generally show poor light and wet fastness. A number of studies have been carried out previously to improve the fastness of such inks by introducing novel dyes and new additives. Based on the research results, use of fast dyes could give ink-jet inks with good properties. This study describes new black dyes for aqueous ink-jet inks, which show better light and wet fastness and print quality, compared to an analogous ink formulated from CI Food Black 2.     

染料型喷墨墨水的研究及应用

阐述了染料型喷墨墨水的性能、特点和配方设计要求,分析了国内染料型喷墨墨水的现状,重点论述利用表面活性剂的复配技术来提高染料型喷墨墨水的流畅性、稳定性和干燥速度的方法。     

喷墨相纸中PVA粘合剂与打印性能的关系

本文研究了彩色喷墨打印相纸的粘合剂与性能的关系。讨论了PVA粘合剂的聚合度对相纸性能以及PVA粘合剂用量对吸墨性能的影响。结果显示,粘合剂聚合度大有利于相纸性能的提高,粘合剂用量对相纸吸墨性能影响较大,合适的PVA聚合度和用量可以得到各项性能优良的喷墨打印相纸。     

A photo-curing study of a pigmented UV-curable alkyd

The photo-curing of a pigmented UV-curable tung oil alkyd system (UVTA) was investigated. The UV-curable alkyd was a Diels–Alder Adduct of trimethylolpropane trimethacrylate with a tung oil-based alkyd. A mixture of yellow iron oxide, red iron oxide, titanium dioxide and lamp black pigments were chosen to obtain an observed yellow color. The pigment mixture, UV-curable alkyd and a reactive diluent were formulated together and photo-cured via a free radical mechanism. The through and surface cure was assessed by thumb twist, blocking resistance and MEK single rub. The through cure and surface cure assessment showed that optimum cure was achieved using UV-A as a source with two photoinitiators: phenylbis(2,4,6-trimethylbenzoyl-phosphine oxide) at 2 wt% and 1-hydroxy-cyclohexyl-phenyl-ketone at 4 wt%. The effect of reactive diluent was also investigated. Ten different reactive diluents were used. After curing, pencil hardness, conical mandrel, impact resistance, cross cut adhesion and gloss were measured. In addition, dynamic mechanical thermal analysis (DMTA) was used to evaluate selected systems. The coatings tests showed that the use of long chain linear structure diluents, such as isodecyl methacrylate, provided UV-curable paint films with better impact resistance, flexibility, and adhesion over other reactive diluents.     

Formulation and characterization of black ceramic ink for a digital ink-jet printing

Formulation of black ceramic ink and its ink-jet printability on a glass substrate were investigated. The thermal and chemical stabilities of CoFe_2-xCr_xO₄ and Ni_0.925Mn_0.075Fe_1.875-xCr_xMn_0.125O₄ black inorganic pigments were analyzed with various amounts of Cr substitutions. The ceramic ink was prepared using the pigment composition that demonstrated color stability during the high temperature glazing process with a minimal Cr substitutional amount. After the dispersion stability and rheological property were optimized, the ceramic ink was suitably jetted from a print head as a single sphere-shaped droplet without satellite droplets. To improve the printability of the ceramic ink, the glass substrate was treated with a perfluorooctyl trichlorosilane (PFTS) solution. As a result, the PFTS surface treatment increased the contact angle of the ceramic ink droplets on the glass substrate and effectively minimized the ink spreading phenomena.     

发展中的数码喷墨用UV固化油墨

应用UV固化油墨于数码喷墨 ,是 1种新兴喷印技术。文章针对数码喷印技术、油墨成分及其油墨的相应要求进行了阐述 ,文中涉及了现有的成型产品 ,并对UV固化油墨的发展趋势进行了展望 ,有助于人们了解这项新技术和新产品