滑石粉在涂布白纸板面涂涂料中的应用研究

采用滑石粉取代涂布白纸板面涂涂料中的高岭土,对比分析滑石粉不同用量对涂料流变性能及涂布白纸板成纸性能的影响。结果表明,随着滑石粉取代量的不断增加,虽然涂料的低剪切黏度有小幅度增加,但涂料的高剪切黏度却呈降低趋势；滑石粉取代高岭土后,对涂布白纸板的白度、平滑度以及表面吸水性能未产生明显影响,但明显提高了涂布白纸板印刷光泽度与光泽度的差值和印刷表面强度。在纸机试验条件下,以滑石粉取代高岭土用于涂布白纸板面涂时也明显提高印刷光泽度与光泽度的差值和印刷表面强度。

Application of Talc in the Top Coating of Coated Paperboard

The rheology of coatings and the properties of the coated board were studied when the kaolin in the top coating formula was replaced by the talc. The results showed that the low shear viscosity of the coatings incresed slightly and the high shear viscosity fell obviously with the amount of talc increasing . The brightness, smoothness and surface water absorption of the coated board were almost unchanged when kaolin was substituted by talc. However, the delta gloss and printing surface strength were improved distinctly. In the paper machine trial, the delta gloss and printing surface strength of the coated board were also increased obviously when talc took the place of kaolin in the top coating formula.