烟包印刷中水性光油耐摩擦性能研究

Research on Friction Resistance of Water-Soluble Varnish in Cigarette Packaging Printing

在烟包印刷用水性光油中添加慢干剂、蜡乳液、阳离子表面活性剂等,配制多组水性光油,以研究光油的流平性、蜡乳液含量、表面张力及干燥时间等对水性光油耐摩擦性能的影响。研究结果表明:不同种类的添加剂及其含量对水性光油的耐摩擦性能影响不同,添加慢干剂、蜡乳液及阳离子表面活性剂均能提高光油的耐摩擦性能,流平性和蜡乳液含量对光油的耐摩擦性能影响最大;慢干剂、初次上光量为光油的流平提供了足够的时间,使得光油自身流平较好,耐磨度较高,而蜡乳液、表面活性剂分别从抵消外部应力和提高光油润湿性能2个方面提高了光油的耐摩擦性能;随着干燥时间的延长,光油的耐摩擦性能得以提高,当镭射纸的干燥时间为10 s、白卡纸的干燥时间为12 s时,其光油的耐摩擦性能最好。

By adding slow drying agent, wax emulsion, cationic surface active agent into water-soluble varnish, new water-soluble varnish was compounded for experiments to study the impacts of leveling property, the addition of wax emulsion, surface tension and drying conditions on the friction resistance of water-soluble varnish. The results showed that different categories and contents of additives had different impacts on the friction resistance. The friction resistance of coating film could be improved by adding slow drying agent, wax emulsion, cationic surface active agent, while leveling property and rate of wax emulsion showed greatest impacts on the friction resistance. Addition of slow drying agent and first polish allowed enough time for leveling, the effect of leveling and friction resistance were good. Addition of wax emulsion and surface active agent decreased the external stress and improved the wetting ability of water-soluble varnish,therefore it improved the friction resistance too. With the extension of drying time, friction resistance could also be improved.Under the condition of drying time being 10 s for laser paper and 12 s for white cardboard, water-soluble varnish demonstrated optimal friction resistance performance.