水性油墨中颜料的分散性能

目的研究颜料在水性油墨中的分散性及对油墨印刷适性的影响。方法对影响分散性的因素进行分析,提出提升分散性的途径。结果颜料的分散性对油墨的多项印刷适性,如着色力、透明度及流变性等均有较大影响。结论在油墨生产中必须选用粒径合适且分布较窄的颜料,同时合理控制油墨体系的粘度;使用表面活性剂,尤其是超分散剂可以有效地提升颜料在水墨中的分散性能;随着纳米技术的日渐成熟,在纳米尺度上对颜料表面进行一些粗糙加工也是实现良好分散的方法。

Pigment Dispersion in Water-based Ink

The work aims to research the dispersion of pigments in water-based ink and its influence on ink printability. The factors affecting the dispersion were analyzed to outline some useful ways to promote the dispersion. The dispersion of pigment had significant impact on multiple factors of the ink printability, such as tinting strength, transparency and rheological properties. During the production of ink, the pigment with appropriate particle size and narrow particle size distribution should be selected and the viscosity of ink should be reasonably controlled. The surfactant, especially hyperdispersant can be used to effectively improve the dispersion of pigment in the water-based ink. With the development of nanotechnology, the rough treatment on the surface of pigment on nanometer scale could be an another significant way to achieve good dispersion.