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A tour of Scandinavian research facilities sparks ideas for cooperation, TAPPI JOURNAL, January 1998, Vol. 81(1)

A tour of scandinavian research facilities sparks ideas for cooperation, TAPPI JOURNAL, January 1998, Vol. 81(1)

Case study: power company operates Alabama mill's 'energy island', TAPPI JOURNAL, January 1998, Vol. 81(1)

Case study: power company operates alabama mill's 'energy island', TAPPI JOURNAL, January 1998, Vol. 81(1)

Focusing on the future of paper machines, TAPPI JOURNAL, January 1998, Vol. 81(1)

Focusing on the future of paper machines, TAPPI JOURNAL, January 1998, Vol. 81(1)

Influence of coating composition on web release in high speed film transfer coating, TAPPI JOURNAL, January 1998, Vol. 81(1)

Influence of coating composition on web release in high speed film transfer coating, TAPPI JOURNAL, January 1998, Vol. 81(1)

The role of analytical winding dynamics in winder design, TAPPI JOURNAL, January 1998, Vol. 81(1)

The role of analytical winding dynamics in winder design, TAPPI JOURNAL, January 1998, Vol. 81(1)

Tools of the hedging trade, TAPPI JOURNAL, January 1998, Vol

Tools of the hedging trade, TAPPI JOURNAL, January 1998, Vol. 81(1)

89APR177

MD microstriations in paper: a two-sided shrinkage phenomenon?, TAPPI JOURNAL April 1989

Colloid chemical aspects of paper formation in the presence of nanofibrillated cellulose and cationic starch, TAPPI Journal September 2024

ABSTRACT: A series of experimental tests were carried out to examine colloidal-scale consequences of optionally treating nanofibrillated cellulose (NFC) with cationic starches of different charge density and dosage (0.5% or 2.0% by weight), adding that material to a furnish prepared from 100% recycled copy paper, and then subjecting the mixture to very different levels of hydrodynamic shear. Tests included optical microscopy, sediment volume tests, sediment velocity tests, and “percent fines” assessment by means of a fiber quality analyzer (FQA). In addition, the zeta potential and charge demand of the studied materials were evaluated. Optical imaging revealed that cationic starch treatment of the NFC tended to agglomerate it into multiparticle clusters, which sometimes could be mostly redispersed by hydrodynamic shear. Subsequent addition of the starch-treated NFC to the default furnish resulted in much of the colloidal material becoming attached to fibers. Subsequent shearing of the mixtures was at least partly effective in separating the clusters of NFC from the fiber surface, resulting in essentially a two-component mixture. Multiparticle NFC clusters coexisted with the fiber suspension, sometimes attached and sometimes not, depending on the details of treatments. Sediment volume tests showed that systems containing cationic starch-treated NFC tended to have a higher density after settling in comparison to untreated NFC; these findings are consistent with the cationic starch acting as a stabilizer on the solid surfaces, allowing them to slide past each other during the settling process. Application of intense hydrodynamic shear tended to result in denser sediment. Results of tests with the sediment velocity messurement and the FQA percent fines assessment did not correlate well with changes in test conditions considered in this study.

Looking Beyond: Change for a More Sustainable World, Paper360º September/October 2024

A Big Leap in ERP Systems: An Integrative, Modular Approach for Paper and Board, Paper360º September/October 2024