Reinforcing ability of fractionated softwood kraft pulp fibres

Sari Asikainen (Corresponding Author)

Research output: Contribution to journalArticleScientificpeer-review

2 Citations (Scopus)

Abstract

Although fractionation has been widely studied, research on the reinforcement ability of different fibre fractions has not been published earlier. In this study bleached softwood kraft pulp was fractionated using hydrocyclones and pressure screens. The fractionated pulps were blended with TMP and GW and the results showed that the type of mechanical pulp (TMP/GW) and the proportion of chemical pulp had the major effect on the blend sheet properties. The long fibre fraction and the thick-walled fibre fraction gave in the mixture with mechanical pulp higher freeness values than the unfractionated pulp. In addition, when the thick-walled fibre fraction was blended with mechanical pulp, the tear index increase was 12-15% for TMP, and 9-20% for GW, depending on the kraft pulp proportion and the tensile index of the kraft pulp. Corresponding increase in tear index of the blend sheets when using the long fibre fraction was up to approximately 10% in TMP and GW blend sheets. This study also showed that it was possible to increase tear index with up to 16% and fracture toughness index with up to 23% of the GW blend sheet by separate refining of the kraft pulp fractions.
Original languageEnglish
Pages (from-to)290-296
Number of pages6
JournalNordic Pulp and Paper Research Journal
Volume28
Issue number2
DOIs
Publication statusPublished - 2013
MoE publication typeA1 Journal article-refereed

Fingerprint

pulp fiber
kraft pulp
Kraft pulp
Softwoods
Thymidine Monophosphate
mechanical pulp
softwood
Mechanical pulp
Fibers
pulp
chemical pulp
Pulp
Chemical pulp
refining
fractionation
Fractionation
Refining
Fracture toughness
Reinforcement
fibre

Keywords

  • fractionation
  • hydrocyclone
  • kraft pulp
  • pressure screen
  • refining
  • reinforcement

Cite this

@article{7d115f3c427d4c5490c391f8d96d781f,
title = "Reinforcing ability of fractionated softwood kraft pulp fibres",
abstract = "Although fractionation has been widely studied, research on the reinforcement ability of different fibre fractions has not been published earlier. In this study bleached softwood kraft pulp was fractionated using hydrocyclones and pressure screens. The fractionated pulps were blended with TMP and GW and the results showed that the type of mechanical pulp (TMP/GW) and the proportion of chemical pulp had the major effect on the blend sheet properties. The long fibre fraction and the thick-walled fibre fraction gave in the mixture with mechanical pulp higher freeness values than the unfractionated pulp. In addition, when the thick-walled fibre fraction was blended with mechanical pulp, the tear index increase was 12-15{\%} for TMP, and 9-20{\%} for GW, depending on the kraft pulp proportion and the tensile index of the kraft pulp. Corresponding increase in tear index of the blend sheets when using the long fibre fraction was up to approximately 10{\%} in TMP and GW blend sheets. This study also showed that it was possible to increase tear index with up to 16{\%} and fracture toughness index with up to 23{\%} of the GW blend sheet by separate refining of the kraft pulp fractions.",
keywords = "fractionation, hydrocyclone, kraft pulp, pressure screen, refining, reinforcement",
author = "Sari Asikainen",
year = "2013",
doi = "10.3183/NPPRJ-2013-28-02-p290-296",
language = "English",
volume = "28",
pages = "290--296",
journal = "Nordic Pulp and Paper Research Journal",
issn = "0283-2631",
publisher = "De Gruyter",
number = "2",

}

Reinforcing ability of fractionated softwood kraft pulp fibres. / Asikainen, Sari (Corresponding Author).

In: Nordic Pulp and Paper Research Journal, Vol. 28, No. 2, 2013, p. 290-296.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Reinforcing ability of fractionated softwood kraft pulp fibres

AU - Asikainen, Sari

PY - 2013

Y1 - 2013

N2 - Although fractionation has been widely studied, research on the reinforcement ability of different fibre fractions has not been published earlier. In this study bleached softwood kraft pulp was fractionated using hydrocyclones and pressure screens. The fractionated pulps were blended with TMP and GW and the results showed that the type of mechanical pulp (TMP/GW) and the proportion of chemical pulp had the major effect on the blend sheet properties. The long fibre fraction and the thick-walled fibre fraction gave in the mixture with mechanical pulp higher freeness values than the unfractionated pulp. In addition, when the thick-walled fibre fraction was blended with mechanical pulp, the tear index increase was 12-15% for TMP, and 9-20% for GW, depending on the kraft pulp proportion and the tensile index of the kraft pulp. Corresponding increase in tear index of the blend sheets when using the long fibre fraction was up to approximately 10% in TMP and GW blend sheets. This study also showed that it was possible to increase tear index with up to 16% and fracture toughness index with up to 23% of the GW blend sheet by separate refining of the kraft pulp fractions.

AB - Although fractionation has been widely studied, research on the reinforcement ability of different fibre fractions has not been published earlier. In this study bleached softwood kraft pulp was fractionated using hydrocyclones and pressure screens. The fractionated pulps were blended with TMP and GW and the results showed that the type of mechanical pulp (TMP/GW) and the proportion of chemical pulp had the major effect on the blend sheet properties. The long fibre fraction and the thick-walled fibre fraction gave in the mixture with mechanical pulp higher freeness values than the unfractionated pulp. In addition, when the thick-walled fibre fraction was blended with mechanical pulp, the tear index increase was 12-15% for TMP, and 9-20% for GW, depending on the kraft pulp proportion and the tensile index of the kraft pulp. Corresponding increase in tear index of the blend sheets when using the long fibre fraction was up to approximately 10% in TMP and GW blend sheets. This study also showed that it was possible to increase tear index with up to 16% and fracture toughness index with up to 23% of the GW blend sheet by separate refining of the kraft pulp fractions.

KW - fractionation

KW - hydrocyclone

KW - kraft pulp

KW - pressure screen

KW - refining

KW - reinforcement

U2 - 10.3183/NPPRJ-2013-28-02-p290-296

DO - 10.3183/NPPRJ-2013-28-02-p290-296

M3 - Article

VL - 28

SP - 290

EP - 296

JO - Nordic Pulp and Paper Research Journal

JF - Nordic Pulp and Paper Research Journal

SN - 0283-2631

IS - 2

ER -