Application of In-situ CaCO3 Formation Method for Better Utilization of Recycled Fibers (2)

Min Woo Lee; Young Ho Lee; Jae Kwon Jung; Yung Bum Seo

doi:10.7584/ktappi.2014.46.5.027

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2014 Vol.46, Issue 5 Preview Page Next Page

Application of In-situ CaCO₃ Formation Method for Better Utilization of Recycled Fibers (2) 고지의 효과적인 활용을 위한 in-situ 탄산칼슘 부착 방식의 연구(2)

30 October 2014. pp. 27-34

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Abstract

In-situ CaCO₃ formation onto recycled wood pulp was studied to improve optical properties and ash attachment to the fiber furnish in papermaking. We controlled initial reaction temperature of in-situ CaCO₃ formation method from 30oC to 50oC. It was found that the attachment of newly formed CaCO₃ to recycled fibers, old newspaper (ONP) in this case, was stronger than that of ground calcium carbonate (GCC, mean dia. 2.4 μm) addition case, but was not much different among those formed at different temperature. Morphologies of newly formed CaCO₃ were changed according to the reaction temperature. More aragonite shape was seen at higher temperature. In-situ CaCO₃ formation increased brightness and lowered ERIC value of ONP sheet greatly at the same level of ash contents when compared to GCC addition method, but gave equivalent ERIC and brightness when compared to those of the precipitated calcium carbonate (PCC) addition method. However, tensile strength of the handsheets of the in-situ CaCO₃ formation method were much greater than those of the PCC addition method.

Keywords

Retention

reaction temperature

polymer

in-situ CaCO₃ forming

recycled fibers

CaCO₃ attachment

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 : 46
No :5
Pages :27-34
Received Date : 2014-09-17
Revised Date : 2014-10-02
Accepted Date : 2014-10-03
DOI :https://doi.org/10.7584/ktappi.2014.46.5.027

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

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