Abstract
This paper presents a new structure of the macroscopic
drying model for simulation of the drying process of the
coated web. The consolidation (dewatering) process of the
coated layer is divided into three phases separated by
the first and second critical points. The model takes
into account filter cake formation, and skin layer
formation on the coating surface. Other drying parameters
such as temperature and moisture profiles, absorption and
evaporation rates are calculated by this model. Some of
the experimental results obtained from the pilot coating
trials are also shown and these are compared with the
simulated data. Commonly measured data included paper
temperatures in drying. Furthermore, gloss, scattering
and web moisture, measured between the drying units with
newly developed measurement system, are presented here.
Analysis of the simulated and measured data showed that
the moisture penetration rate into the base paper slowed
down dramatically after the first critical point.
Mottling behavior of the printed samples in conjunction
with the drying conditions is also discussed.
| Original language | English |
|---|---|
| Title of host publication | 93rd Annual Meeting of the Pulp and Paper Technical Association of Canada, PAPTAC |
| Subtitle of host publication | Book B |
| Publisher | Pulp and Paper Technical Association of Canada (PAPTAC) |
| Pages | 221-228 |
| ISBN (Print) | 978-1-8970-2324-2, 978-1-8970-2325-9, 978-1-8970-2326-6 |
| Publication status | Published - 2007 |
| MoE publication type | A4 Article in a conference publication |
| Event | 93rd Annual Meeting of the Pulp and Paper Technical Association of Canada, PAPTAC - Montreal, Canada Duration: 6 Feb 2007 → 8 Feb 2007 |
Conference
| Conference | 93rd Annual Meeting of the Pulp and Paper Technical Association of Canada, PAPTAC |
|---|---|
| Abbreviated title | PAPTAC |
| Country/Territory | Canada |
| City | Montreal |
| Period | 6/02/07 → 8/02/07 |