目的 针对目前联机胶印逆向上光工艺表面效果单一的技术瓶颈,提出一种基于表面能调控的前置表面工艺。方法 通过向色墨添加丙烯酸酯改性聚硅氧烷/聚乙烯蜡复合剂,降低色墨表面能,促使其与UV光油发生定向内聚反应,叠加后续印刷颜色,实现联机胶印一次成形雾感亮哑与砂砾触感的双效叠加。结果 该工艺可通过网点成数和UV光油涂布量等参数的调控,精准定制微米级波纹结构（颗粒密度为0.1~2 mm）,并实现表面光泽度、触摸手感的双向调控。相较于传统逆向上光,其省去逆向底油印刷色组,减少了油墨消耗,并可与逆光、肤感等工艺兼容,实现单次联机组合印刷呈现≥3种区域化效果,增加产品的层次感,大幅提升生产效率。结论 该技术仅需配备前置上光单元即可适配主流产线,适合大范围推广应用,为烟标差异化设计提供了高效环保的创新解决方案。
Abstract
In view of the current technical bottleneck regarding the single surface effect of the online offset printing reverse glazing process, the work aims to present a pre-surface treatment process based on surface energy regulation. An acrylate-modified polysiloxane/polyethylene wax composite was added to the color ink to reduce the surface energy of the color ink, so as to promote a directional cohesive reaction between the color ink and the UV varnish. Subsequently, by superimposing subsequent printed colors, the simultaneous realization of a dual-effect superposition of a mist-like bright-dull appearance and a gritty tactile sensation in a single-pass online offset printing was achieved. The research indicated that this process could accurately customize micron-scale corrugated structures (with a particle density ranging from 0.1 to 2 mm) through the adjustment of parameters such as the dot area coverage and the coating amount of the UV varnish. Moreover, it enabled bidirectional regulation of the surface gloss and tactile perception. In comparison with traditional reverse vanishing, this process omitted the reverse under-coating printing unit, thereby reducing ink consumption. Additionally, it was compatible with processes such as reverse vanishing and skin-feel treatments. This allowed for the presentation of at least three regionalized effects in a single online combined printing, enhancing the product's sense of hierarchy and significantly improving production efficiency. This technology only requires the installation of a pre-vanishing unit to be adaptable to mainstream production lines. Therefore, it is suitable for extensive promotion and application, offering an efficient and environmentally friendly innovative solution for the differentiated design of cigarette packaging labels.
关键词
联机胶印 /
印刷表面整饰工艺 /
前置表面工艺
Key words
online offset printing /
printing surface finishing process /
pre-surface process
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基金
上海烟草包装印刷有限公司科技项目（K2025-007,K2026-009）
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