Application of PVAm for Strength Improvement of TMP Mixed Tissue Paper

Jin Ho Seo; Kwang Seob Lee; Jeong Yong Ryu

doi:10.7584/JKTAPPI.2018.12.50.6.84

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Application of PVAm for Strength Improvement of TMP Mixed Tissue Paper TMP 배합 화장지의 강도개선을 위한 PVAm의 적용

30 December 2018. pp. 84-91

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Abstract

In this study, dual dry strength agents (PVAm and anionic PAM) with fast adsorption rate were used to improve the strength properties of TMP mixed tissue paper which is difficult to retain fines. The retention of fines, formation and strength properties of handsheets were evaluated according to the mechanical beating of pulp slurry and addition level of PVAm and anionic PAM. In addition, dual system and conventional cationic PAM were added before and after beating in order to compare the effect of dry strength agents on the physical properties of handsheets. The dual system (PVAm and anionic PAM) which shows the free conformation of polymer chains based on a simple structure and few steric hindrance compared with conventional cationic PAM, is analyzed to exhibit a better strength enhancement when the fiber length is long before beating, but there was no significant effect on retention. Also, the dual system improved the physical properties of handsheets even when the pulp slurry was beaten to 600 mL CSF to improve the plausibility of fibers. In terms of fines retention, dual system did not show a tendency depending on the dosage of PVAm, however, 3% dosage of PVAm is most appropriate, judging based on the improvement of physical properties of handsheets. Consequentially, the rapid adsorption of PVAm makes it possible to easily change the charge of the fiber surface to strong cationic, and then to induce rapid adsorption of anionic PAM to improve the strength without contamination due to the formation of residual polymeric complex.

Keywords

Polyvinylamine

polyacrylamide

toilet paper

retention

tensile index

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 : 50
No :6
Pages :84-91
Received Date : 2018-12-05
Revised Date : 2018-12-15
Accepted Date : 2018-12-18
DOI :https://doi.org/10.7584/JKTAPPI.2018.12.50.6.84

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

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Literature Cited