A pilot web former designed to study retention-formation relationships
2010 (English)In: Nordic Pulp & Paper Research Journal, ISSN 0283-2631, Vol. 25, no 2, 185-194 p.Article in journal (Refereed) Published
A pilot-scale fourdrinier former has been developed for the purpose of investigating the relationship between retention and paper formation (features, retention aids, dosage points, etc.). The main objective of this publication was to present the R-F (Retention and formation)-machine and demonstrate some of its fields of applications. For a fine paper stock (90% hardwood and 10% softwood) with addition of 25% Filler (based on total solids content), the relationship between retention and formation was investigated for a microparticulate retention aid (cationic polyacrylamide together with anionic montmorillonite clay). The retention-formation relationship of the retention aid system was investigated after choosing standardized machine operating conditions (e.g. the jet-to-wire speed ratio). As expected, the formation was impaired when the retention was increased. Since good reproducibility was attained, the R-F (Retention and formation)-machine was found to be a useful tool for studying the relationship between retention and paper formation.
Place, publisher, year, edition, pages
2010. Vol. 25, no 2, 185-194 p.
Flocculation, Formation, Fourdrinier former, Kraft pulp, Pilot study, Polyacrylamide, Retention, Retention agent
Paper, Pulp and Fiber Technology
IdentifiersURN: urn:nbn:se:kth:diva-96256ISI: 000279341100007OAI: oai:DiVA.org:kth-96256DiVA: diva2:529890
QC 201205302012-05-312012-05-312012-05-31Bibliographically approved