阳离子改性剂对墨滴铺展渗透扩散行为的影响机理

Influence Mechanism of Cationic Modifier onInk Droplet Spreading,Penetration and Diffusion Behaviors

随着生产生活中喷墨数码印花技术的普及,以及印刷图案使用的日益复杂,在提高颜色强度和色牢度前提下,对印后图案边缘清晰度也提出了越来越高的要求。印后轮廓的清晰程度通常与微量墨滴在多孔织物上的铺展扩散等行为密切相关,对面料的有效预处理能够显著改善这种渗化现象。研究以混纺机织物为例,选择阳离子改性剂作为预处理试剂,通过测试处理后织物(纱线)表面电位、化学元素组成情况、润湿性能以及扫描电镜下对前后纱线表面形貌变化的观察,对不同使用浓度下,5微升涂料墨滴形成的不同铺展面积、边缘渗化清晰度及颜色深度做出解释,并探究得到墨滴铺展、渗透与扩散的行为机理及成因。试验结果表明,阳离子改性剂最佳使用浓度为1%,可达到最佳边缘清晰度与铺展形态。

With the popularization of ink-jet digital printing technology and the increasingly complicated graphic design,higher requirements have been put forward on the edge definition of printed patterns with the en-hancement of color strength and color fastness.The clarity of printed contour could be closely associated with the spread and diffusion behaviors of ink droplets on porous fabrics,and effective pretreatment would significantly im-prove the bleeding phenomenon.The blended woven fabrics were taken as an example and cationic modifier was selected as the pretreatment reagent.By testing the surface zeta potential,chemical element composition and wet-tability of the treated fabrics(yarns)and observing the changes of yarn surface morphology before and after treat-ment under SEM,different spreading areas,edge diffusion definitions and color depths of 5ml coating ink drop-lets with different concentrations were explained.Additionally,the mechanism and causes of ink droplet sprea-ding,penetration and diffusion behaviors were explored.The results showed that the best concentration of cation-ic modifier was 1%,which could achieve the clearest edge definition and most ideal spreading morphology.