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  • Pettersson, GunillaMittuniversitetet,Avdelningen för kemiteknik,FSCN (author)

Upgrading the strength properties of sheets from hardwood high yield pulps

  • Article/chapterEnglish2018

Publisher, publication year, extent ...

  • Appita Inc.2018
  • printrdacarrier

Numbers

  • LIBRIS-ID:oai:DiVA.org:ri-42469
  • https://urn.kb.se/resolve?urn=urn:nbn:se:ri:diva-42469URI
  • https://urn.kb.se/resolve?urn=urn:nbn:se:miun:diva-36664URI

Supplementary language notes

  • Language:English
  • Summary in:English

Part of subdatabase

Classification

  • Subject category:ref swepub-contenttype
  • Subject category:kon swepub-publicationtype

Notes

  • In the current paper it is shown that tensile and compression strength of sheets from hardwood high yield pulps (HYP), which has been manufactured at a low energy input in refining, can be multiplied by improving the fibre-fibre bond strength and the number of contact areas between fibre surfaces in the sheet structure. At fibre surface treatment with cationic starch the properties are improved at almost preserved bulk (i.e., preserved density). Remarkable improvements are achieved at densification of the sheet structures by pressing in a hot press nip at temperatures well above the softening temperature of wet lignin. The former technique is above all to prefer in manufacturing of middle plies in paperboard composites, whereas the latter technique is of special interest in manufacturing of packaging papers with high demands upon strength. For instance, it is shown in the paper how tensile index on sheets of CTMP from birch (CSF 480 ml) can be enhanced from 20 to 50 kNm/kg and compression index (SCT) from 10 to 35 kNm/kg by the tested techniques.

Subject headings and genre

  • CMC
  • CTMP
  • Polyelectrolytes
  • Pressure heat
  • Starch
  • Tensile index
  • Dyes
  • Fibers
  • Hardwoods
  • Manufacture
  • Pulp refining
  • Surface treatment
  • Cationic starches
  • Compression index
  • Compression strength
  • Number of contacts
  • Softening temperature
  • Strength property
  • Pulp

Added entries (persons, corporate bodies, meetings, titles ...)

  • Höglund, Hans,1942-Mittuniversitetet,Avdelningen för kemiteknik(Swepub:miun)hanhog (author)
  • Norgren, Sven,1973-Mittuniversitetet,Avdelningen för kemiteknik(Swepub:miun)svenor (author)
  • Engstrand, Per,1955-Mittuniversitetet,Avdelningen för kemiteknik(Swepub:miun)pereng (author)
  • Peng, F.Stora Enso, Sweden,Stora Enso, Karlstad (author)
  • Granfeldt, T.Valmet, Sweden,Valmet, Sundsbruk (author)
  • Bergstrom, J.SCA, Sweden,SCA Östrand, Timrå (author)
  • Joelsson, T.RISE,MoRe Research Örnsköldsvik AB,MoRe Research, Domsjö (author)
  • MittuniversitetetAvdelningen för kemiteknik (creator_code:org_t)

Related titles

  • In:Pan Pacific Fibre Value Chain Conference 2018, Proceedings: Appita Inc., s. 142-1479780975746998

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