溶剂负载摩擦法评价UV胶印油墨印品固化程度

Evaluation Method of Curing Degree of UV Ink Offset Printing Based on Solvent Loaded Friction Method

中文关键词: UV固化  固化程度  溶剂  负载摩擦

英文关键词: UV curing  curing degree  solvent  loaded friction

中文摘要:

      目的 UV油墨固化程度是印品质量的关键影响因素，开发新型UV油墨固化程度评价方法，用以准确、直观地判断墨层固化程度，指导印刷工艺条件优化。方法 通过调控墨层的UV固化光能量，制备系列不同固化程度的胶印印品，以间歇红外法测定墨层的双键转化率定量分析固化交联反应的程度，进一步以墨层在不同溶剂下的摩擦次数建立墨层固化等级的评价方法。结果 不同UV固化能量下的样品，具有不同的双键转换率，依据不同比例的乙醇与水混合溶剂下的印品耐磨次数可以判定出印品的固化程度。结论 采用溶剂负载摩擦法主观经验判定依赖性低，可实现对UV油墨印品的整体油墨固化程度进行判定，具有良好的生产应用价值。

英文摘要:

      Since the curing degree of UV ink is a key influencing factor of printing quality, the work aims to develop a novel ink curing evaluation method to accurately and intuitively judge the curing degree of the UV ink layer and guide the optimization of printing process conditions. A series of offset printing products with different curing degrees were prepared by adjusting the UV curing light energy acting on the ink layer. The degree of curing crosslinking reaction was quantitatively analyzed through the intermittent infrared method to measure the double bond conversion rate of the ink layer. Further, the evaluation method for curing degree of the ink layer was established based on the friction times of the ink layer in different solvents. The samples under different UV curing energies had different double bond conversion rates, and the wear resistance times of the printed products under different proportions of ethanol and water mixed solvent could determine the curing degree of the printed products. In conclusion, the solvent loaded friction method has low dependence on subjective experience and can determine the overall ink curing degree of UV ink printed products, which has good application value in production.