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2016 Vol.48, Issue 5 Preview Page
Optimization of Retention System for High-loading of the Structured PCC

경질탄산칼슘 구조체 고충전을 위한 보류시스템 최적화 방안 탐색

Soo-Yeon Jeon
,
Jung-Yoon Park
,
Hyoung-Jin Kim†
전수연
,
박정윤
,
김형진 †
Dept. of Forest Products and Biotechnology, Kookmin University, Seoul
국민대학교 삼림과학대학 임산생명공학과
†E-mail: hyjikim@kookmin.ac.kr
30 October 2016. pp. 68-75
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Abstract

In papermaking industry, inorganic fillers such as CaCO3, produce some positive functions in high opacity and brightness, good surface smoothness, printability and dimensional stability of paper. They also provide the relative savings of production cost. However, fillers are also the sources of the negative effects such as the loss of strength of paper and the retention problem due to the poor retention mechanism. They also tend to be distributed unevenly in the Z-direction of paper. Therefore, much research efforts were focused on the modification and pre-flocculation of fillers to solve the retention problem and the strength reduction by using GCC (grounded calcium carbonate) and PCC (precipitated calcium carbonate).

In this paper, PCC was designed to form the structured PCC by using PF1 and PF2 as pre-flocculation agents. Different retention systems were applied to examine the optimum conditions for the high retention mechanism of the fillers with the structured PCC and polyelectrolytes such as C-PAM (cationic polyacrylamide), C-starch and glyoxal as retention agents. To evaluate the optimum retention system, the retention ratio of PCC was measured by comparing the turbidity of RDA (retention and drainage analyzer) filtrate, air permeability (FAP) of the wet-web indicates dewatering performance. Lastly, the formation index of handsheet was evaluated. The lower values of the three factors (i.e., the turbidity of RDA filtrate, FAP of the wet handsheet and the formation index of handsheet) indicated that the structured PCC has provided the more favorable retention of the fillers.

Keywords
Precipitated calcium carbonate
structured PCC
RDA
pre-flocculation
retention system
References

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Information
  • Publisher :Korea Technical Association of The Pulp and Paper Industry
  • Publisher(Ko) :한국펄프종이공학회
  • Journal Title :Journal of Korea TAPPI
  • Journal Title(Ko) :펄프종이기술
  • Volume : 48
  • No :5
  • Pages :68-75
  • Received Date : 2016-09-21
  • Revised Date : 2016-10-23
  • Accepted Date : 2016-10-24
  • DOI :https://doi.org/10.7584/jktappi.2016.10.48.5.68
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