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Sizing with pre-flocculated alkylketene dimer (AKD) dispersions.
Kappa Kraftliner, Piteå.
AssiDomän Corporate R&D, Stockholm.
2002 (English)In: Nordic Pulp & Paper Research Journal, ISSN 0283-2631, E-ISSN 2000-0669, Vol. 17, no 3, p. 240-245Article in journal (Refereed) Published
Abstract [en]

Pre-flocculated AKD dispersions were used to size laboratory sheets. The cationic AKD dispersion was pre-flocculated in a Britt Dynamic Drainage Jar. Carboxymethylcellulose and white water from a linerboard mill were used as flocculating agents. The particle size distribution was determined to verify the flocculation. Laboratory sheets sized with pre-flocculated AKD dispersions were made in a dynamic sheet former. The sizing efficiency was evaluated with the 60-second Cobb value, contact angle measurements and quantitative analysis of the total AKD content in the laboratory sheets. The results show that sizing with pre-flocculated AKD improved the sizing efficiency significantly, due to an increased retention. This clearly indicates that agglomerates can be used for internal sizing provided that the flocculation process is controlled. (14 refs.)

Place, publisher, year, edition, pages
2002. Vol. 17, no 3, p. 240-245
National Category
Chemical Process Engineering
Research subject
Chemical Technology
Identifiers
URN: urn:nbn:se:ltu:diva-3512DOI: 10.3183/NPPRJ-2002-17-03-p240-245Local ID: 15741690-6f83-11db-962b-000ea68e967bOAI: oai:DiVA.org:ltu-3512DiVA, id: diva2:976370
Note
Validerad; 2002; 20060929 (bajo)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2017-11-24Bibliographically approved

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Sterte, Johan

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