双助留体系下预絮聚加填对纸张性能的影响

Effect of Pre-flocculation and Filling on Paper Properties under Double Retention System

关键词:  预絮聚  双组分助留  纸张性能

Key Words:pre-flocculation  two-component retention  paper properties

摘要:采用CPAM、皂土双组分助留体系预絮聚AKD和PCC，探究各组分添加顺序对纸张施胶效果、填料留着率及纸张物理性能的影响。对比传统加填工艺发现，采用[PCC+CPAM+皂土+CS+AKD]的预絮聚工艺时，纸张的力学性能提高最为明显，抗张指数提高22.43%，耐破指数提高52%，同时，纸张的匀度指数从111.93显著改善至68.95。将AKD提前加入浆料中，然后采用[PCC+CS+CPAM+皂土]的预絮聚工艺时，纸张的施胶度和填料留着率明显提高，Cobb60值降低了24.84%，填料留着率提高了3.73%。但所有预絮聚工艺由于增大了PCC的颗粒大小，使得纸张的白度、不透明度、透气度都有所降低。

Abstract:AKD and PCC were pre-flocculated with two-component retention system: CPAM and bentonite . The effects of addition sequence on sizing effect, filler retention and physical properties of paper were investigated. Compared with the traditional filling process, it was found that when the pre-flocculation process of [PCC+CPAM+bentonite+CS+AKD] was used, mechanical properties of paper were most obviously improved, the tensile index and the burst index were increased by 22.43% and 52%, respectively. Meanwhile, the formation index was significantly increased from 111.93 to 68.95. When AKD was added to the pulp in advance, and then the pre-flocculation process of [PCC+CS+CPAM+bentonite] was adopted, the sizing degree and the filler retention rate of paper were significantly improved, the Cobb60 value was reduced by 24.84%, the filler retention rate was increased by 3.73%. However, all pre-flocculation processes have reduced whiteness, opacity and air permeability of paper due to the increased particle size of PCC.