Enhanced quality - strength and cost efficiency by means of layering

Research output: Contribution to journalArticleProfessional

Abstract

The effect of adding thermomechanical pulp (TMP) in fine paper’s middle layer was studied. Bleached hardwood pulp made of birch (BHW) was studied in top and bottom layers while TMP was layered in middle layer of handsheets. Layering of TMP in the middle enhanced surface smoothness significantly compared to trialspoints where pulps were mixed and homogenous. Adding 40% of TMP pulp in the middle layer had no effect on surface properties of handsheets. Addition of TMP increased bulk of uncaledered handsheets significantly. Increase of TMP or stratifying the pulps had no effect on dry paper tensile properties. Tensile strength and residual tension i.e. tension holding capacity of wet web increased significantly with increasing of TMP in furnish. Mixing TMP in pulps instead of stratifying gave higher tensile and residual tension values for wet samples. Addition of TMP decreased brightness significantly.
Original languageEnglish
JournalPaperi ja puu
Volume89
Issue number4
Publication statusPublished - 2006
MoE publication typeD1 Article in a trade journal

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Thermomechanical pulp
pulp
Pulp
cost
Costs
Hardwoods
Tensile properties
Surface properties
Luminance
Tensile strength
tensile strength
Betula

Cite this

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title = "Enhanced quality - strength and cost efficiency by means of layering",
abstract = "The effect of adding thermomechanical pulp (TMP) in fine paper’s middle layer was studied. Bleached hardwood pulp made of birch (BHW) was studied in top and bottom layers while TMP was layered in middle layer of handsheets. Layering of TMP in the middle enhanced surface smoothness significantly compared to trialspoints where pulps were mixed and homogenous. Adding 40{\%} of TMP pulp in the middle layer had no effect on surface properties of handsheets. Addition of TMP increased bulk of uncaledered handsheets significantly. Increase of TMP or stratifying the pulps had no effect on dry paper tensile properties. Tensile strength and residual tension i.e. tension holding capacity of wet web increased significantly with increasing of TMP in furnish. Mixing TMP in pulps instead of stratifying gave higher tensile and residual tension values for wet samples. Addition of TMP decreased brightness significantly.",
author = "Antti Oksanen and Kristian Salminen and Jarmo Kouko",
year = "2006",
language = "English",
volume = "89",
journal = "Paperi ja puu",
issn = "0031-1243",
number = "4",

}

Enhanced quality - strength and cost efficiency by means of layering. / Oksanen, Antti; Salminen, Kristian; Kouko, Jarmo.

In: Paperi ja puu, Vol. 89, No. 4, 2006.

Research output: Contribution to journalArticleProfessional

TY - JOUR

T1 - Enhanced quality - strength and cost efficiency by means of layering

AU - Oksanen, Antti

AU - Salminen, Kristian

AU - Kouko, Jarmo

PY - 2006

Y1 - 2006

N2 - The effect of adding thermomechanical pulp (TMP) in fine paper’s middle layer was studied. Bleached hardwood pulp made of birch (BHW) was studied in top and bottom layers while TMP was layered in middle layer of handsheets. Layering of TMP in the middle enhanced surface smoothness significantly compared to trialspoints where pulps were mixed and homogenous. Adding 40% of TMP pulp in the middle layer had no effect on surface properties of handsheets. Addition of TMP increased bulk of uncaledered handsheets significantly. Increase of TMP or stratifying the pulps had no effect on dry paper tensile properties. Tensile strength and residual tension i.e. tension holding capacity of wet web increased significantly with increasing of TMP in furnish. Mixing TMP in pulps instead of stratifying gave higher tensile and residual tension values for wet samples. Addition of TMP decreased brightness significantly.

AB - The effect of adding thermomechanical pulp (TMP) in fine paper’s middle layer was studied. Bleached hardwood pulp made of birch (BHW) was studied in top and bottom layers while TMP was layered in middle layer of handsheets. Layering of TMP in the middle enhanced surface smoothness significantly compared to trialspoints where pulps were mixed and homogenous. Adding 40% of TMP pulp in the middle layer had no effect on surface properties of handsheets. Addition of TMP increased bulk of uncaledered handsheets significantly. Increase of TMP or stratifying the pulps had no effect on dry paper tensile properties. Tensile strength and residual tension i.e. tension holding capacity of wet web increased significantly with increasing of TMP in furnish. Mixing TMP in pulps instead of stratifying gave higher tensile and residual tension values for wet samples. Addition of TMP decreased brightness significantly.

M3 - Article

VL - 89

JO - Paperi ja puu

JF - Paperi ja puu

SN - 0031-1243

IS - 4

ER -