Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
The role of evaporative dewatering in impulse pressing
RISE, STFI-Packforsk.
2003 (English)In: Tappi Journal, Vol. 2, no 3, p. 26-32Article in journal (Refereed) Published
Abstract [en]

The objective was to link heat transfer to water removal mechanisms, specifically evaporative dewatering, in impulse pressing experiments. Two independent laboratory devices - a platen press and a shoe press - were used to impulse press fiber webs made from softwood bleached kraft (SBK) over a range of basis weights (20-200 g/m2). In the platen press experiments, evaporative dewatering was evaluated by comparing the measured heat input to the amount of heat theoretically required to vaporize the water in excess of unheated wet pressing. Evaporative dewatering was found to be most pronounced for lightweight sheets, and enhanced dewatering can be attributed to this mechanism and other high-temperature mechanisms for basis weights above 60 g/m2. In the shoe press experiments, a composite sheet of five 30-g/m2 webs was used to evaluate profiles for resulting dryness, density, and water retention value (WRV) in the thickness direction. Evaporative effects were confined principally to the layer directly in contact with the heated surface. Application: A better understanding of the water removal mechanisms in impulse pressing process may accelerate the industrial application of impulse technology.

Place, publisher, year, edition, pages
2003. Vol. 2, no 3, p. 26-32
Keywords [en]
Dewatering, Drying, Evaporation, High temperature effects, Pressing (forming), Softwoods, Impulse pressing, Bleached pulp, Bleached Pulps, Drainage, High Temperature Tests, Press Drying, Softwood Pulps, Water Removal, Water Retention, Wet Pressing, Wet Webs
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-34082Scopus ID: 2-s2.0-0347599034OAI: oai:DiVA.org:ri-34082DiVA, id: diva2:1231338
Available from: 2018-07-06 Created: 2018-07-06 Last updated: 2018-07-06Bibliographically approved

Open Access in DiVA

No full text in DiVA

Scopus
By organisation
STFI-Packforsk
Natural Sciences

Search outside of DiVA

GoogleGoogle Scholar

urn-nbn

Altmetric score

urn-nbn
Total: 1 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
v. 2.35.4