【作者】 陈跃涛；

【导师】 魏先福； 黄蓓青；

【作者基本信息】 北京印刷学院 ， 材料物理与化学， 2008， 硕士

【摘要】 塑料水性凹印油墨作为一种新型包装印刷材料,其最大的优点是不含有挥发性有机溶剂,不会对环境产生污染,是一种极具前途的环保型印刷油墨。水性凹印油墨由于在附着力、干燥速度等方面还不能满足印刷的要求,因此在塑料薄膜上的应用还没有得到推广。本课题采用高速研磨的分散手段,选用多种颜料种类、乳液聚合物和助剂,通过大量实验确定了塑料水性凹印油墨的组分,研究了多种组分对塑料水性凹印油墨性能的影响,得到了塑料水性凹印油墨的优化配方。研究结果表明,采用高速研磨的分散手段得到的塑料水性凹印油墨样品各项性能良好,基墨的粒径在10μm以下;影响基墨分散性的因素包括颜基比、分散剂种类及其添加量,不同颜色基墨达到最佳分散性能时所采用的颜基比不同;对于黑墨和青墨,混合不同种类分散剂制备的基墨基墨分散状况比使用单一分散剂制备的基墨要好,基墨中分散剂的添加量有一个最佳值,分散剂含量过大或过小都会导致基墨的分散性变差。不同消泡剂在塑料水性凹印基墨中的消泡效率不同,消泡剂A8具有高的消泡效率;单一的树脂配制的油墨往往无法满足油墨印刷适性的要求,通常采用混合不同混合树脂的方法来改善油墨的印刷适性,适合PET和BOPP表面印刷的油墨对应的混合调稀树脂溶液不同;适量的助溶剂可提高塑料水性凹印油墨的干燥速度,同时降低油墨体系的表面张力,流平剂主要对油墨的光学性能产生影响,而基材润湿剂的加入通过降低接触角,改善了油墨在塑料表面的润湿,油墨的印刷适性也得到较大的改善,影响油墨附着力的主要因素是调稀树脂、颜基比、分散剂种类及其添加量。更多还原

【Abstract】 As a new packaging and printing material, the biggest advantage of plastic water-based gravure ink is it do not contain volatile organic solvents and do not polute the environment, it will be environment-friendly printing ink with good future. As plastic water-based gravure ink can not meet the requirements of printability in adherence and dryness, the application of water-based ink on plastic has not been promoted.This project adopted dispering method of high speed grinding, selecting many kinds of pigments, emulsions and additions, determining the component of plastic water-based gravure ink through many experiments, developing the effects of component on performance of plastic water-based gravure ink, abtaining the optimum formulation of plastic water-based gravure ink.The result indicated that, the performance of plastic water-based gravure ink prepared by high speed grinding was good, the particle size of primary ink was below 10μm. The factors which influenced dispersivity of primary ink included pigment/resin ratios, types and amounts of dispersant. The pigment/resin ratios were different when preparing different types of primary inks with good dispersivity. The dispersivity of primary ink prepared by mixed dispersants was better than that prepared by single dispersant in both black and cyan inks. The amounts of dispersant in primary ink had a best value. Dispersivity of primary ink became worse when the the amount of dispersant was too large or too little. Different defoamers in the plastic water-based gravure ink had different results. The defoamer of 810 had great efficiency of defoaming. Inks prepared by single resin would not satisfy the desire of printability. In order to obtain inks with good printability, the method of mixing different types of resins was used. The mixed resin solution of inks was different on PET and BOPP. Proper quantities of cosolvent could increase drying rate and reduce the suface tention of the system. Levelling agent could improve optical performance of the inks. Substrate wetting agent improved the wetting condition by reducing the contact angle, and at the same time printablity of inks was also improved. The factors which influenced adherence of inks included resins, pigment/resin ratios, different types and amounts of dispersant.更多还原