Evaluation of Fracture Toughness of Paper in Wet State (II) : Effect of Fiber Curl Treatment

You Sun Roh; Yung Bum Seo

doi:10.7584/jktappi.2016.10.48.5.22

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Evaluation of Fracture Toughness of Paper in Wet State (II) : Effect of Fiber Curl Treatment

30 October 2016. pp. 22-28

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Abstract

Paper breaks can cause a large economic loss in the paper mill and papermakers should take all possible precaution measures to prevent them. Fracture mechanics was employed for the evaluation of the paper break tendency on the paper machine and, until now, has been considered to be one of the most logical approaches to the problem. Fiber curl treatment usually increases paper strain to failure in tensile loading and, in the present study, we tried to relate fiber curl treatment to fracture energy. Two different furnishes (softwood and hardwood bleached kraft pulp) were used with three different refining levels; furthermore, their fracture energy values were measured at different dryness levels (40%, 60%, 80%, and 95%). While fiber curl treatment greatly increased fracture energy for the hardwood pulp, the effect was marginal for the softwood pulp. The highest stretch was mostly at 80% solid content, where the highest fracture energy occurred.

키워드

Fracture mechanics

fiber curl

dryness

stretch

load-widening

paper break

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 :22-28
Received Date : 2016-09-08
Revised Date : 2016-10-01
Accepted Date : 2016-10-04
DOI :https://doi.org/10.7584/jktappi.2016.10.48.5.22

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

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