Abstract
The properties and behavior of pure aqueous foams have
been quite extensively studied. On the other hand, very
little is known about the chemical interactions between
foaming agents and paper/board making raw materials in
aqueous fiber-foam suspensions. The objective of this
examination was to increase the understanding of basic
mechanisms affecting fiber-foam suspension. In
particular, gaining understanding of the chemical
interactions between foaming agents and paper/board
making raw materials was of great interest. The foaming
behavior of pulp formulations in the presence of three
anionic and four non-ionic foaming aids was tested with a
tailor-made foaming test environment. Foaming aids for
testing were chosen based on their reported good foaming
properties, environmental safety, and availability as
bulk chemicals, as well as their insensitivity to changes
in temperature and pH within limits relevant to the foam
forming process. Foam formed hand sheets with different
furnish recipes were made and tested to evaluate the
effect of the three selected foaming agents (selected
based on their foaming characteristics) on the formation
and retention processes, the technical properties of the
hand sheets, and the performance of other chemicals used
in paper/board manufacturing in the presence of the
foaming aids. Additionally, the potential of utilizing
the selected foaming aids in practical foam forming of
paper or board was verified in a small-scale pilot trial.
The results obtained in these laboratory and pilot-scale
studies showed that the type and amount of foaming aids
used have significant effects on foam properties, filler
retention, sizing, dewatering, bulk, and mechanical
properties of the fiber network. In fact, the selection
of the foaming aid and its interaction with other wet end
additives seems to be one of the key factors affecting
the processability and quality of foam formed products.
| Original language | English |
|---|---|
| Title of host publication | Tappi Proceedings |
| Subtitle of host publication | PaperCon 2014 |
| Publisher | TAPPI Press |
| Pages | 758-765 |
| Volume | 1-3 |
| ISBN (Print) | 978-1-5108-0128-8 |
| Publication status | Published - 2014 |
| MoE publication type | A4 Article in a conference publication |
| Event | PaperCon 2014 Conference & Exhibition - Nashville, TN, United States Duration: 26 Apr 2014 → 30 Apr 2014 |
Conference
| Conference | PaperCon 2014 Conference & Exhibition |
|---|---|
| Abbreviated title | PaperCon 2014 |
| Country/Territory | United States |
| City | Nashville, TN |
| Period | 26/04/14 → 30/04/14 |
Keywords
- foam forming
- foaming aids
- retention
- sizing
- strength
