水基涂料性质对涂布纸表面摩擦性能影响的研究

采用GFJ04A型高速分散机制备出水基涂料,探讨了水基涂料的组分对涂布纸表面摩擦性能的影响,并探讨其磨损机理.结果表明:在瓷土和沉淀碳酸钙混合的涂料配方中,沉淀碳酸钙含量较高时涂布纸的静态和动态摩擦系数较高,而采用压光可以降低涂布纸表面的摩擦系数;在瓷土、沉淀碳酸钙和重质碳酸钙混合的颜料配方中,重质碳酸钙含量从0%～20%时,涂层表面的摩擦系数增大,但继续增加其含量时摩擦系数有所降低;羧基丁苯胶乳含量从6%～10%时,涂层表面的摩擦系数逐渐降低,当其含量超过10%后静态摩擦系数反而增大,当羧基丁苯胶乳含量为18%时摩擦系数达到最大值;润滑剂可以降低涂层表面的摩擦系数,其中聚乙烯蜡乳液和氧化聚乙烯乳液的减摩效果最佳.

Influence of Water-based Coating Properties On Friction Coefficient of Coated Paper

Water-based coating was prepared by using GFJ04 high-speed disperser. Main components of water- based coating, which probably influence friction coefficient of coated paper, were studied. Worn surfaces of coating layer were examined on a scanning electron microscope (SEM). Results indicated that higher precipitated calcium carbonate (PCC) ratio to clay in mixed pigments resulted in higher static and dynamic friction coefficient. Calendering decreased friction coefficient of coated paper. Adding of GCC from 0% to 20% increased friction coefficient of coated paper in Clay/PCC/GCC mixed coating formulation, but with added amount of GCC increasing, friction coefficient decreased. Addition of Latex from 6% to 10% decreased friction coefficient, but static friction coefficient had maximum value. at 18%. Among the different lubricants used in coating, PE emulsion and OPE emulsion decreased friction coefficient effectively and they had more effects on dynamic friction coefficientthan on static friction coefficient.