AKD sizing of TCF and ECF bleached birch pulp characterized by peroxide edge wicking

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Fältnamn	Indikatorer	Metadata
000		02970naa a2200361 4500
001		oai:DiVA.org:kth-6063
003		SwePub
008		060823s2006 \| \|\|\|\|\|\|\|\|\|\|\|000 \|\|eng\|
024	7	a https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-60632 URI
024	7	a https://doi.org/10.3183/NPPRJ-2006-21-02-p237-2442 DOI
040		a (SwePub)kth
041		a engb eng
042		9 SwePub
072	7	a ref2 swepub-contenttype
072	7	a art2 swepub-publicationtype
100	1	a Åvitsland, Grete4 aut
245	1 0	a AKD sizing of TCF and ECF bleached birch pulp characterized by peroxide edge wicking
264	1	c 2006
338		a print2 rdacarrier
500		a QC 20100827. Uppdaterad från manuskript till artikel (20100827)
520		a To study the impact of extractable materials and xylan on the sizing efficiency of totally chlorine-free (TCF) bleached birch pulp and elemental-chlorine-free (ECF) bleached birch pulp, several pulps with different amounts of extractable material were studied. The content of extractable material in the pulp was shown to be detrimental for sizing efficiency, measured both as Cobb. values and edge penetration in a model liquid packaging board, and a higher content of extractable material causes a reduced sizing efficiency for a given pulp. No significant difference was observed between extracted TCF and ECF bleached birch pulps, while unextracted pulps containing the same amount of extractable material yielded different sizing efficiencies. The TCF bleached birch pulp had a lower sizing efficiency than did the ECF bleached birch, probably because of differences in the fatty acid composition. A greater amount of extractable material also resulted in a smaller fraction of non-extractable alkyl ketene dimers (AKD) relative to the total amount of AKD in the sheet. Enzymatic removal of xylan and thus the reduction of the surface charge had no measurable effect on sizing efficiency. Extracted TCF and ECF bleached pulps only need a content of 0.05 kg/ton non-extractable AKD or 0.08 kg/ton total AKD in the sheets produced to achieve a good sizing effect.
650	7	a TEKNIK OCH TEKNOLOGIERx Kemiteknik0 (SwePub)2042 hsv//swe
650	7	a ENGINEERING AND TECHNOLOGYx Chemical Engineering0 (SwePub)2042 hsv//eng
653		a Absorption; AKD; ECF; Edge penetration; Hardwood; Kraft; Liquid packaging board; Peroxide edge wicking index; TCF
653		a Chemical engineering
653		a Kemiteknik
700	1	a Sterner, Mirjam4 aut
700	1	a Wågberg, Larsu KTH,Fiber- och polymerteknologi4 aut0 (Swepub:kth)u14jbte3
700	1	a Ödberg, Larsu KTH,Fiber- och polymerteknologi4 aut0 (Swepub:kth)u1pi51e7
710	2	a KTHb Fiber- och polymerteknologi4 org
773	0	t Nordic Pulp & Paper Research Journalg 21:2, s. 237-241q 21:2<237-241x 0283-2631x 2000-0669
856	4 8	u https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-6063
856	4 8	u https://doi.org/10.3183/NPPRJ-2006-21-02-p237-244

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Av författaren/redakt...: Åvitsland, Grete; Sterner, Mirjam; Wågberg, Lars; Ödberg, Lars

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