Abstract A composite filler was developed by pre-flocculation of fiber fines and precipitated calcium carbonate (PCC) particles with flocculants such as cationic polyacrylamide (cPAM) and bentonite. The composite filler was compared with a conventional loading method in terms of physical properties of handsheet and filler retention. The handsheets using the composite filler showed higher strength properties than that using a conventional loading at a similar paper ash content level, implying that paper ash content can be increased maintaining same level of paper strength. Optical properties such as opacity and brightness of the paper with the composite were quite similar with the paper with the conventional loading. Filler retention of the composite filler was slightly higher than that of the conventional loading even though retention aids were not used for the composite filler. Paper formation of the composite filler was better than the case of the conventional loading. However, the sheet with the composite filler showed lower bulk than that with the conventional loading. Conclusively, the composite filler technology by pre-flocculation of fines and filler has a potential to be utilized to produce a high loaded paper.

中文翻译：

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纤维细粉和PCC预絮凝复合填料及其对纸张性能的影响

摘要 通过将纤维细粉和沉淀碳酸钙 (PCC) 颗粒与絮凝剂如阳离子聚丙烯酰胺 (cPAM) 和膨润土进行预絮凝，开发了一种复合填料。在手抄纸的物理性能和填料保留率方面，将复合填料与传统的加载方法进行了比较。使用复合填料的手抄纸在类似的纸灰含量水平下显示出比使用常规填料更高的强度性能，这意味着可以增加纸灰含量保持相同水平的纸强度。具有复合材料的纸的光学特性如不透明度和亮度与具有常规负载的纸非常相似。尽管复合填料未使用助留剂，但复合填料的填料留着率略高于常规填料。复合填料的成纸性优于常规填料的情况。然而，具有复合填料的片材表现出比具有常规负载的片材更低的体积。总之，通过细粒和填料预絮凝的复合填料技术具有用于生产高负载纸的潜力。