彩色喷墨打印纸涂层中固色剂对涂布性能和图像质量的影响

Influence of Color Fixing Agent on Coating Quality and Image Quality of Color Inkjet Printing Paper

关键词:  纸张涂层  固色剂  图像质量

Key Words:paper coating  fixing agent  picture quality

摘要:分析了彩色喷墨打印纸涂层中阳离子固色剂的固色机理；研究了阳离子固色剂聚二甲基二烯丙基氯化铵（PolyDADMA）用量对涂料黏度、涂布纸表面性能以及喷墨打印的图像实地密度、网点扩大、清晰度和耐水性的影响。结果表明，加入固色剂能够改善图像质量，随着固色剂用量的增加，能够获得各颜色较高的图像实地密度和较小的网点扩大，图像清晰度提高，抗水性增强。但固色剂用量超过一定量时，会引起涂料黏度过大、涂布不均匀以及涂层表面强度下降。当固色剂用量为5份（相对于100份二氧化硅颜料）时，图像实地密度、清晰度和图像抗水性达到最佳。

Abstract:The color fixation mechanism of cationic color fixing agent in color inkjet printing paper coating was analyzed. The influence of dosage of color fixing agent PolyDADMA on coatings viscosity， property of coating surface and solid density， dot gain， line sharpness and water resistance performance of inkjet printed image was researched. It was found in the experiment that the cationic color fixing agent PolyDADMA could improve the image quality and the higher dosage could realize higher solid density， smaller dot gain， higher image detail sharpness and stronger water resistance performance of various colors. However， if the proportion of PolyDADMA was higher than a certain value， viscosity of the coatings would be too high， resulting in uneven coating， and the strength of coating surface would firstly increase and then reduce. If the color fixing agent solid dosage in the coatings was up to 5 g （with 100 g silicon dioxide as reference）， the density， the fine line sharpness and the water resistance performance of image could be optimal.