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Mapping and modelli...
Mapping and modelling of optical properties from pulp to super calendered paper
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- Enberg, Sofia (författare)
- Mittuniversitetet,Avdelningen för kemiteknik,Norske Skog Saugbrugs, NO-1756 Halden, Norway
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- Opdal, Øivind (författare)
- Norske Skog Saugbrugs, NO-1756 Halden, Norway
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- Axelsson, Patrik (författare)
- Norske Skog Saugbrugs, NO-1756 Halden, Norway
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visa fler...
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- Eriksen, Øyvind (författare)
- Paper & Fibre Res Inst, NO-7491 Trondheim, Norway
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- Rundlöf, Mats (författare)
- Mittuniversitetet,Avdelningen för kemiteknik,Capisco Sci & Art, SE-60234 Norrkoping, Sweden
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- Paulsson, Magnus (författare)
- Mittuniversitetet,Avdelningen för kemiteknik,AkzoNobel Pulp & Performance Chem, SE-44580 Bohus, Sweden
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visa färre...
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(creator_code:org_t)
- 2015
- 2015
- Engelska.
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Ingår i: Appita journal. - 1038-6807. ; 68:2, s. 128-138-
- Relaterad länk:
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https://urn.kb.se/re...
Abstract
Ämnesord
Stäng
- During production of mechanical pulp based paper, the pulp darkenswithin the process which represents a significant cost for the mill. Amapping of the optical properties of the pulp was conducted along theprocess, from pulp mill to paper machine, at a mill producing supercalendered (SC) paper on three paper machines. The focus was to evaluateat which positions in the mill the discolouration occurs and also whichfraction of the pulp darkens the most.The fine fraction of the pulp darkened more than the long fibrefraction. Bleached pulp diluted with white water from the paper machinedarkened more during storage than pulp diluted with clear filtrate. Thewhite water contains a considerable amount of suspended solids, i.e.pulp fines and clay. There was a tendency for a shoulder in absorptionspectra of the pulp stored in white water from the paper machine in theregion 550 to 650 nm, both for fibres and for fines. This is in the sameregion where the added dyes have their absorption maxima and also somecomplexes between iron and some of the components among lignin and theextractives. Simulation of retention times of different fractions showedthat, although the main part of the fine material is retained in thepaper within a few hours, a small part might circulate for considerablylonger time.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Materialteknik -- Pappers-, massa- och fiberteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering -- Paper, Pulp and Fiber Technology (hsv//eng)
Nyckelord
- Mechanical pulp
- Mill mapping
- Optical properties
- Pulp fractions
- Simulation
- Storage
Publikations- och innehållstyp
- ref (ämneskategori)
- for (ämneskategori)
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