染料与纤维共磨对纸浆模塑染色和强度性能的影响

目的探究深色纸浆模塑制品染色过程中出现色差的机理,研究染料与纤维共磨对染色效果和强度性能的影响,提出改善深色纸浆模塑制品染色效果与强度性能的工艺。方法在相同磨浆转数下,探究染料的加入方式对纤维形态、染色制品强度、光学性能及染料上染率的影响;将染料与纤维共磨,探究不同磨浆转数对浆料的滤水性能、染色制品的染色效果和强度的影响。结果实验证实,染料和纤维共磨有利于改善染色制品的抗张强度和耐破强度,能在显著提高染色效果的同时有效降低染色制品的正反面色差。与传统添加方式相比,染色制品的色差由2.53缩小到0.20,上染率从72.02%提高到了77.93%。显微镜图像分析显示,共磨浆料的纤维起毛现象更明显。此外,随着磨浆转数增加,染色制品的光学性能和强度性能得到提高。结论染料与纤维共磨可以提高打浆效果,改善深色纸浆模塑制品的染色效果和强度性能。

Effect of Co-refining of Dyes and Fibers on the Dyeing Performance and Strength of Pulp Molded Products

The work aims to study the mechanism of color difference in dyeing process of dark pulp molded product and the effect of co-refining of dyes and fibers on dyeing performance and strength, and propose the technology to improve the dyeing performance and strength of dark pulp molded products. Under the same number of revolutions, the effects of adding methods of dyes on fiber morphology, and strength, optical performance and dye uptake rate of dyed products were investigated. The dyes and fibers were co-refined to discuss the effects of different refining revolutions on the drainage properties of pulp and the dyeing performance and strength of dyed products. The experiment proved that co-refining of the dyes and fibers was conducive to improving the tensile strength and bursting strength of the dyed products, significantly improving the dyeing effects and effectively reducing the color difference of both sides of the dyed products. Compared with the traditional adding methods, the color difference of dyed products reduced from 2.53 to 0.20, and the dye uptake rate increased from 72.02% to 77.93%. Microscope image analysis showed that the fiber picks were more remarkable in the co-refined slurry. In addition, with the increase of refining revolutions, the optical performance and strength of dyed products were improved. Co-refining of dyes and fibers can enhance the beating effect and improve the dyeing performance and strength of dark pulp molded product.