• search hit 11 of 20
Back to Result List

Post-curing and size reversion – An extended mechanism of ASA sizing

  • Assuming internal sizing agents like AKD and ASA to be chemically bound onto the cellulose fibre one would expect sizing of paper to be stable over time. Further, ASA as the more reactive substance, will develop sizing straight after drying on the paper machine. Even though papermakers are got used to these benefits of internal sizing after many years of practical experience, there are also observations of postcuring and fugitivity of sizing, which do not fit to the common sizing theory. Investigations on a fine paper model have shown ASA to move from a sized paper into a blank sheet, which is in direct contact. Detection and quantification of ASA was carried out by means of NIR-spectroscopy. Mobility of ASA is enhanced at elevated temperature and moisture in the sheet. It goes along with a decrease of sizing level in the sized sheet, whereas the moved ASA does develop almost no sizing in the blank sheet, even after heat treatment. Only after surface treatment with an aluminium compound it can be re-activated for sizing. Based on these and additional findings we have developed a model of ASA sizing, which takes into account such untypical properties as post-curing and fugitivity.

Download full text files

Export metadata

Additional Services

Share in Twitter Search Google Scholar
Metadaten
Author:Emanuele Martorana, Jochen Hoffmann, Stephan Kleemann
URN:urn:nbn:de:bvb:m347-dtl-0000000191
Document Type:Conference Proceeding
Language:English
Date of Publication (online):2022/01/26
Year of first Publication:2011
Publishing Institution:Hochschule für angewandte Wissenschaften München
Contributing Corporation:20. Internationales Münchner Papier Symposium, 30.3-1.4.2011
Release Date:2022/01/26
GND Keyword:LeimenGND; PapierGND
Page Number:19
Note:
parallele Sprachausgabe (deutsch): Nachreife und Leimungsschwund – Neue interessante Effekte bei geleimten Papieren
Departments and Institutes:Fakultäten der Hochschule München / FK 05 Fakultät für Technische Systeme, Prozesse und Kommunikation
Dewey Decimal Classification:6 Technik, Medizin, angewandte Wissenschaften / 66 Chemische Verfahrenstechnik
Illustrations:Illustration/en
Illustrations:grafische Darstellung/en
Licence (German):Keine CC-Lizenz, es gilt der Veröffentlichungsvertrag und das Deutsche Urheberrecht
Einverstanden
Diese Webseite verwendet technisch erforderliche Session-Cookies. Durch die weitere Nutzung der Webseite stimmen Sie diesem zu. Unsere Datenschutzerklärung finden Sie hier.