Studies on the Quality Improvement of Printing Paper by Process Controlling of DIP and TMP

Sung-Jun Hwang; Jong-Keun Lim; Hyoung-Jin Kim; Sung-Hyun Chung

doi:10.7584/ktappi.2015.47.5.005

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Studies on the Quality Improvement of Printing Paper by Process Controlling of DIP and TMP 탈묵펄프 및 열기계펄프의 공정 조절을 통한 인쇄용지의 품질향상 연구

30 October 2015. pp. 5-14

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Abstract

Recently, the use of wood resources has been limited due to global environmental change, like global warming and desertification. It is very critical in Korea’s paper industries because lots of virgin pulp are dependant on direct import from abroad for printing grade of paper. In this work, the alternatively best available technique for reducing the import amounts of BKP (bleached Kraft pulp) was considered by mixing DIP (deinked pulp) and TMP (thermomechanical pulp) for the manufacture of high quality paper. Generally known, the sheet prepared from fibrous raw materials of DIP and TMP has lower strength and optical properties than that prepared from BKP. This study was aimed to improve the sheet quality by using DIP and TMP. 4 kinds of polyelectrolytes were approached to find out the best effects on physical strength and optical brightness improvements, and high retention behaviors with GCC (ground calcium carbonate).

In conclusion, amphoteric PAM with 1,000,000 molecular weight (g/mol) and 0.5 charge density (meq/g) was best for the improvement of strength properties with the mixture of DIP and TMP. GCC retention rate was also the highest with cationic-PAM of above 2,000,000 molecular weight (g/mol) and about 2.0-3.0 charge density (meq/g) of strengthening agent.

Keywords

Deinked pulp

thermomechanical pulp

dry strength agent

ground calcium carbonate

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 : 47
No :5
Pages :5-14
Received Date : 2015-08-17
Revised Date : 2015-08-31
Accepted Date : 2015-09-02
DOI :https://doi.org/10.7584/ktappi.2015.47.5.005

Journal of Korea TAPPI ISSN:0253-3200(Print) 펄프종이기술

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Literature Cited