李涛 张美云 宋顺喜

摘要：填料经预絮聚后以絮聚体的形式加填纸张中，絮聚体在湿部的尺寸及稳定性对纸张性能有着重要影响。采用不同用量的阳离子聚丙烯酰胺（CPAM）对沉淀碳酸钙（PCC）进行预絮聚，通过絮聚体粒径的变化，研究了不同剪切条件下PCC絮聚体抗剪切与再絮聚效果，并考查了所得絮聚体对成纸性能的影响。结果表明，随着CPAM用量从1%增加至7%，絮聚体粒径由2337 μm增大至3192 μm。与常规PCC加填方法相比，当CPAM用量为3%～7%且加填量55%时，预絮聚加填纸张留着率均可提高约3个百分点左右。当CPAM用量为3%，填料含量为30%时，预絮聚加填比常规加填纸张抗张指数提升了约16%，而CPAM用量高于3%时所得的大粒径絮聚体对成纸抗张指数反而不利，且纸张白度有所降低。

关键词：絮聚体；CPAM；留着；抗张强度

中图分类号：TS7539文献标识码：ADOI：1011980/jissn0254508X201803004

收稿日期：20171106（修改稿）

基金项目：陕西省教育厅科研计划项目资助（项目编号：17JK0067）；陕西国防工业职业技术学院科研基金资助项目（GFY1719）。Properties of PCC Flocs Preflocculation with CPAM and Its Application as Filler in PapermakingLI Tao 1，3，*ZHANG Meiyun1，2SONG Shunxi1

（1 College of Bioresources Chemical and Materials Engineering， Shaanxi University of Science & Technology， Xian， Shaanxi Province，

710021； 2 National Demonstration Center for Experimental Light Chemisty Engineering Education，Shaanxi University of Science & Technology，

Xian， Shaanxi Province， 710021； 3Chemical Engineering Department， Shaanxi Institute of Technology， Xian， Shaanxi Province，710300）

（*Email： l1tao@163com）

Abstract：PCC filler in the form of flocs by preflocculation applied in papermaking was studied， the size and stability of the floc in wet end had important influence on the properties of paper Precipitated Calcium Carbonate（PCC）was preflocculated with different amounts of cationic polyacrylamide（CPAM）， shearing resistance and preflocculation capacity of PCC flocs under different shearing conditions were investigated， influence of various flocs from different preflocculation conditions on paper properties was also studiedThe results showed that the particle size of flocs was larger and its stability was better when high dosage of CPAM was usedCompared with the conventional filler loading， filler retention rate in high filler content paper increased about 3% when CPAM dosage was 3%～7% and filler content was 55%， tensile index increased about 16% when CPAM dosage was 3% However， under high CPAM dosage， the addition of larger flocs were unfavorable to the tensile index of paper， and whiteness of paper.

Key words：flocs； CPAM； retention； tensile strength

無机矿物填料作为纸张的第二大组成部分，在改善纸张光学性能、表面性能、印刷适性以及赋予纸张功能化方面发挥了重要作用，除此之外，在纸张中添加填料还可改善网部滤水性能从而有利于提高湿纸幅干度[1]、纸机车速和节约蒸汽用量[23]，达到节能降耗、降低生产成本的目的[4]。然而提高填料含量，对纸张强度、施胶度以及留着率均会造成不利影响[5]。填料含量高还会导致纸张内结合强度和表面强度的下降，在使用过程中出现掉毛掉粉现象[67]。……