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Strong paper from spruce CTMP
Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Avdelningen för kemiteknik.
Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Avdelningen för kemiteknik.
Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Avdelningen för kemiteknik.
2016 (engelsk)Inngår i: International Mechanical Pulping Conference 2016, IMPC 2016, TAPPI Press, 2016, s. 229-233Konferansepaper, Publicerat paper (Fagfellevurdert)
Abstract [en]

This study was carried out on sheets from spruce CTMP fibers, which are surface treated with a mix of cationic starch and CMC and blended with 20% bleach softwood chemical pulp fibers before handsheets were prepared in a Rapid Kothen sheet former, where the sheets were dried to 40-55% d.c. The sheets were pressed in a hot press nip in a pilot machine with adjustable pressure and heat. Both low and high nip pressure were used in combination with two different nip temperatures, 80 °C and 100 °C, to achieve sheets in a broad range of densities. The results show that remarkable improvements are possible, both in terms of tensile index (up to 85 kNm/kg) and compression strength, SCT, (up to 38kNm/kg) on the CTMP-based sheets under optimal conditions at papermaking, i.e. consolidate the sheet structure in a press nip at evaluated temperatures. It is evident from the current study that there is an as of yet unexploited potential in modifying the conditions of papermaking from spruce CTMP furnishes, which can be utilized for the manufacturing of papers with high requirements on strength and stiffness, e.g. packaging papers.

sted, utgiver, år, opplag, sider
TAPPI Press, 2016. s. 229-233
Emneord [en]
CMC, CTMP, Heat, Polyelectrolytes, Pressure, Starch, Tensile index Adsorption
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Identifikatorer
URN: urn:nbn:se:miun:diva-29836Scopus ID: 2-s2.0-85006415447ISBN: 9781510830738 (tryckt)OAI: oai:DiVA.org:miun-29836DiVA, id: diva2:1063037
Konferanse
International Mechanical Pulping Conference 2016, IMPC 2016; Jacksonville; United States; 26 September 2016 through 28 September 2016
Tilgjengelig fra: 2017-01-09 Laget: 2017-01-09 Sist oppdatert: 2017-04-26bibliografisk kontrollert

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Pettersson, GunillaNorgren, SvenHöglund, Hans

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