Projects per year
Abstract
We present how harmful different wood extractives carried over to paper mill with unbleached softwood Kraft pulp are for the strength of packaging papers and boards. The investigations were done by simulating industrial papermaking conditions in laboratory-scale trials for handsheet production. It was found that fatty acids are the most relevant compounds in the carryover pitch extractives (CPEs), as they readily interfere in fiber–fiber bonding strength, control the properties of CPE micelles, and are furthermore the most abundant compounds. Addition of cationic starch improved strength and evened out the strength differences of handsheets with different CPE compounds. Oleic acid (unsaturated fatty acid) was an exception, as it was above average harmful for paper strength without cationic starch and also heavily impaired the functioning of cationic starch. As a whole, these findings demonstrate that fatty acids, especially unsaturated ones, are the most relevant CPE compounds contributing to the reduced efficiency of cationic starch and decreased strength of unbleached softwood Kraft paper. This makes the cleaning of process waters by precipitating CPEs on the pulp fibers harmful for paper strength.
Original language | English |
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Article number | 6 (44) |
Pages (from-to) | 29350–29359 |
Number of pages | 10 |
Journal | ACS Omega |
Volume | 6 |
Issue number | 44 |
DOIs | |
Publication status | Published - 2021 |
ASJC Scopus subject areas
- Chemical Engineering(all)
- Chemistry(all)
Fields of Expertise
- Sustainable Systems
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Dive into the research topics of 'How Different Carryover Pitch Extractive Components are Affecting Kraft Paper Strength'. Together they form a unique fingerprint.Projects
- 1 Finished
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CD-Laboratory for Fiber Swelling and Paper Performance
Hirn, U., Lahti, J. A., Schennach, E., Fischer, W. J., Czibula, C. M., Urstöger, G. J., Ganser, C., Schuller, M., Krainer, S., Xhori, R., Spirk, S. & Niegelhell, K.
1/12/15 → 30/11/23
Project: Research project