【作者】 李静洋； 王晓芳； 欧阳芸； 王海侨；

【Author】 Jingyang Li;Xiaofang Wang;Yun Ouyang;Haiqiao Wang;Beijing Engineering Research Center for the Synthesis and Applications of Waterborne Polymers,Beijing University of Chemical Technology;China Academy of Printing Technology;

【机构】 北京化工大学北京市水性聚合物合成与应用工程技术研究中心； 中国印刷科学技术研究院；

【摘要】 为了保证油墨在失去流动性之前能完全流平,以消除刷痕、橘皮或滚痕等施工印迹,避免出现缩孔、针孔、流挂等各种墨层缺陷,一般需要在油墨中加入各种不同的流平剂。本文选取了三种不同结构类型的流平剂,研究这些流平剂对聚丙烯酸系水性油墨成膜性能的影响规律。研究结果表明,聚醚改性的有机硅类流平剂,在降低油墨的表面张力、提高抗缩孔能力、增加墨膜的滑度等方面具有更明显的效果;高分子量聚二甲基硅氧烷型流平剂则在增加滑度、消泡方面性能更出色;而丙烯酸共聚物型流平剂对提高油墨的流动性、改善其对基材的润湿效果的作用更加显著。所以实际应用中,应将不同类型的流平剂复配使用,以赋予油墨优良的成膜性能。更多还原

【Abstract】 In this contribution,three leveling agents with different chemical structures were applied in a water-based polyacrylic ink to investigate the effect of leveling agents on the film-forming performance of the ink.The results showed that,polyether-modified dimethylpolysiloxane leveling agent has advantageous to reduce the surface tension of the ink,and increase smoothness of the ink film.The polydimethylsiloxane emulsion leveling agent with high molecular weight is more suitable to defoam the ink and increase smoothness of the ink film.While polyacrylate-based leveling agent has more distinct advantages in improving flow property and wetting effect of the ink on substrate than the other two leveling agents.更多还原