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The effect of increased pulp yield using additives in the softwood kraft cook on the physical properties of low-grammage handsheets
SCA R&D Centre, Sweden.
KTH Royal Institute of Technology, Sweden.
SCA R&D Centre, Sweden.
RISE - Research Institutes of Sweden, Bioekonomi.
Vise andre og tillknytning
2017 (engelsk)Inngår i: Nordic Pulp & Paper Research Journal, ISSN 0283-2631, E-ISSN 2000-0669, Vol. 32, nr 2, s. 317-323Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

The effect of increasing the pulp yield by the addition of sodium borohydride (NaBH4) or polysulfide (PS) in softwood kraft cooking, i.e. enhancing the retention of glucomannan, on the physical properties of low-grammage handsheets was studied. In addition to the yield improvement, an increase in tensile index was observed, especially at lower degrees of beating. These higher yield pulps showed an increase in pore volume, indicating an increased degree of swelling of the fibres. Presumably, the increased flexibility of the fibres affects the bonding strength and leads to the higher tensile index observed.

sted, utgiver, år, opplag, sider
2017. Vol. 32, nr 2, s. 317-323
Emneord [en]
kappa number, polysulphide, tensile strength, porosimeter, z direction strength, softwood, handsheet, physical properties, yield
HSV kategori
Identifikatorer
URN: urn:nbn:se:ri:diva-32950DOI: 10.3183/NPPRJ-2017-32-03-p317-323OAI: oai:DiVA.org:ri-32950DiVA, id: diva2:1170167
Tilgjengelig fra: 2018-01-02 Laget: 2018-01-02 Sist oppdatert: 2018-01-11bibliografisk kontrollert

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