薄膜印刷用水性丙烯酸凹印油墨印刷适性的研究

Study on Printability of Water-Based Acrylic Gravure Ink for Film Printing

凹版印刷过程中油墨的传输和分离转移性能与油墨的流变性能密切相关,直接影响油墨的印刷适性,进而导致印刷过程中出现堵版、网点增大等问题,因此改善凹版水性油墨的印刷适性对提高印刷效率和印品品质十分重要。本研究以核壳型聚丙烯酸树脂乳液连结料制备的水性凹印油墨为考察对象,研究了增稠剂PUR-42用量对油墨的流变性能及其印刷适性的影响,以及薄膜印刷用水性凹印油墨适宜的屈服值、黏度值范围。结果表明,对于本研究的薄膜印刷用水性凹印油墨体系,当增稠剂用量为0.5wt%时,油墨具有最适宜的触变性,印刷稳定性好,且不影响其温度敏感性,较理想的屈服值范围为5~20m Pa,适宜的黏度为20~200m Pa·s。

The transfer and separation properties of ink in gravure printing are closely related to the rheological properties of inks, which directly affects the printability of ink. It is very important to improve the printability of gravure water-based ink to improve the printing efficiency and printing quality. A self-made core-shell polyacrylic resin latex was used as a binder to prepare the plastic water-based gravure ink. The effect of rheological properties on the printability of water-based ink with different thickener contents, and the suitable range of yield value and viscosity of the film gravure aqueous ink were studied. the results showed that when the dosage of thickener is 0.5 wt%, the ink has suitable thixotropism and its temperature sensitivity nearly unaffected. The suitable yield range of plastic gravure water-based ink is 5~20 m Pa, and the suitable viscosity is 20~200 m Pa·s.