贝壳粉作为填料对纸张性能的影响

Characteristics of Shell Powder and the Effect of Its Application as Filler on Paper Properties

关键词:  贝壳粉  填料特性  纸张性能

Key Words:shell powder  filler characteristics  paper properties

摘要:通过与商品轻质碳酸钙(PCC)进行对比,研究了贝壳粉作为填料的性能及其不同用量对纸张强度性能和光学性能的影响,探讨了贝壳粉作为造纸填料的可行性及优势。结果表明,贝壳粉呈梭状的偏三角面体,并聚集在一起成丛簇状,平均粒径为0.44 μm,颗粒尺寸分布均匀,白度为91.4%,沉降体积为5.35 mL/g。加填纸的性能测试结果表明,与PCC加填纸相比，在贝壳粉用量为10%时,加填纸张的强度性能下降较少且光学性能增加较多,加填效果最佳；在加填量相同时,贝壳粉的加填效果与PCC相当,且贝壳粉加填纸的不透明度和光散射系数比PCC加填纸的高,可作为一种新型的造纸填料。

Abstract:Comparing with commercial precipitated calcium carbonate(PCC) the characteristics of shell powder and the effect of its application as filler in various dosages on paper strength and optical properties were studied, and the feasibility of using shell powder as papermaking filler and its advantages were discussed. The results showed that shell powder exhibited spindle-shaped scalenohedral and gathered together in clusters, the average particle size was 0.44 μm and the particle size distribution was uniform, the brightness was 91.4%, the sediment volume was 5.35 mL/g. It was feasible to use shell powder as papermaking filler. Physical tests of shell powder-filled paper indicated that, when the same content was filled, the strength properties and optical properties of the shell powder-filled paper were similar to that of PCC-filled paper, while the opacity and light scattering coefficient were higher than that of PCC-filled paper. Shell powder could be used as a novel papermaking filler. When the filler content was 10%, the tensile index, tear index, burst index and brightness of shell powder-filled paper were 0.09 N·m/g, 0.05 mN·m²/g, 0.03 kPa·m²/g and 0.57% respectively and lower than PCC-filled paper, while the opacity and light scattering coefficient were 2.62 point and 3.84 m²/g higher respectively compared with the PCC-filled paper.