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Evolution of the pa...
Evolution of the paper structure along the length of a twin-wire former
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- Lindström, Stefan B, 1974- (författare)
- Mittuniversitetet,Institutionen för naturvetenskap, teknik och matematik (-2012),The forest as a resource,Mid Sweden University,FSCN
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- Uesaka, Tetsu (författare)
- FPInnovations,Mid Sweden University,FSCN
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- Hirn, Ulrich (författare)
- Graz University of Technology,Graz, Austria
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(creator_code:org_t)
- Bury, UK : Pulp Paper Fund. Res. Soc. 2009
- 2009
- Engelska.
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Ingår i: ADVANCES IN PULP AND PAPER RESEARCH, OXFORD 2009, VOLS 1-3. - Bury, UK : Pulp Paper Fund. Res. Soc.. - 9780954527266 ; , s. 207-245, s. 207-245
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Abstract
Ämnesord
Stäng
- A particle-level numerical model is used to simulate forming with a twin-wire former configuration. The development of the paper structure along the length of the former is observed to explain the effects ofthe dewatering elements on the paper structure at different jet-to-wire speed ratios, consistencies, and target basis weights. The simulations indicate that most of the structure development takes place in the initial part of forming (forming roll) and, in some instances, at the drop to atmospheric pressure after the forming roll. Dramatic effects onthe through-thickness fibre orientation anisotropy are observed when the consistency is varied by changing the jet thickness, while changes in basis weight had less impact. The through-thickness concentration gradient was almost uniform throughout the forming process, except in the lower range of typical papermaking consistencies. This indicates that the dewatering mechanism is normally thickening, rather than filtration.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Kemiteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Chemical Engineering (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Annan teknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Other Engineering and Technologies (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Materialteknik -- Pappers-, massa- och fiberteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering -- Paper, Pulp and Fiber Technology (hsv//eng)
Nyckelord
- Papermking
- Forming
- Fibre suspension
- Simulation
- Chemical engineering
- Kemiteknik
- Engineering physics
- Teknisk fysik
Publikations- och innehållstyp
- ref (ämneskategori)
- kon (ämneskategori)
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