Foam forming of long fibers

Research output: Contribution to journalArticleScientificpeer-review

5 Citations (Scopus)

Abstract

The paper industry is continuously seeking possible solutions for new fiber based products to widen their product portfolio and to develop more valuable products. For the current products the technologies enabling the reduction of the raw material consumption and improvement of the energy and water efficiency are under great interest. This is a challenging goal since the quality of the end product should simultaneously remain intact. In a water-laid process the challenge to improve formation increases with increasing fiber length. To date the only solution has been to decrease the forming consistency. However, when using foam as a carrier fluid flocculation of fibers is decreased and fiber length can be increased. Foam forming studies have been performed with long fibers in realistic process conditions at VTT's pilot environment. Our scope is on long-fiber suspensions that can still be run on existing paper machine geometries. The average fiber length and foam density were the main variables in these trials. The formation of papers made of short fibers was always very good. For longer fibers formation improved with decreasing foam density and was much better than that of water-laid samples. Long fibers were found to increase the bulk and the tensile index, but to decrease the z-strength.
Original languageEnglish
Pages (from-to)239-247
JournalNordic Pulp and Paper Research Journal
Volume31
Issue number2
DOIs
Publication statusPublished - 2016
MoE publication typeA1 Journal article-refereed

Fingerprint

foams
foam
Foams
Fibers
pulp and paper industry
water
flocculation
raw materials
Water
fibre
energy
Flocculation
Suspensions
Raw materials
sampling
product
geometry
Fluids
Geometry
fluid

Keywords

  • crowding number
  • flocculation
  • foam forming
  • formation
  • long fiber

Cite this

@article{288b54cb46f74c0a9edc8b7c89762415,
title = "Foam forming of long fibers",
abstract = "The paper industry is continuously seeking possible solutions for new fiber based products to widen their product portfolio and to develop more valuable products. For the current products the technologies enabling the reduction of the raw material consumption and improvement of the energy and water efficiency are under great interest. This is a challenging goal since the quality of the end product should simultaneously remain intact. In a water-laid process the challenge to improve formation increases with increasing fiber length. To date the only solution has been to decrease the forming consistency. However, when using foam as a carrier fluid flocculation of fibers is decreased and fiber length can be increased. Foam forming studies have been performed with long fibers in realistic process conditions at VTT's pilot environment. Our scope is on long-fiber suspensions that can still be run on existing paper machine geometries. The average fiber length and foam density were the main variables in these trials. The formation of papers made of short fibers was always very good. For longer fibers formation improved with decreasing foam density and was much better than that of water-laid samples. Long fibers were found to increase the bulk and the tensile index, but to decrease the z-strength.",
keywords = "crowding number, flocculation, foam forming, formation, long fiber",
author = "Antti Koponen and Katariina Torvinen and Ari J{\"a}sberg and Harri Kiiskinen",
year = "2016",
doi = "10.3183/NPPRJ-2016-31-02-p239-247",
language = "English",
volume = "31",
pages = "239--247",
journal = "Nordic Pulp and Paper Research Journal",
issn = "0283-2631",
publisher = "De Gruyter",
number = "2",

}

Foam forming of long fibers. / Koponen, Antti (Corresponding Author); Torvinen, Katariina; Jäsberg, Ari; Kiiskinen, Harri.

In: Nordic Pulp and Paper Research Journal, Vol. 31, No. 2, 2016, p. 239-247.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Foam forming of long fibers

AU - Koponen, Antti

AU - Torvinen, Katariina

AU - Jäsberg, Ari

AU - Kiiskinen, Harri

PY - 2016

Y1 - 2016

N2 - The paper industry is continuously seeking possible solutions for new fiber based products to widen their product portfolio and to develop more valuable products. For the current products the technologies enabling the reduction of the raw material consumption and improvement of the energy and water efficiency are under great interest. This is a challenging goal since the quality of the end product should simultaneously remain intact. In a water-laid process the challenge to improve formation increases with increasing fiber length. To date the only solution has been to decrease the forming consistency. However, when using foam as a carrier fluid flocculation of fibers is decreased and fiber length can be increased. Foam forming studies have been performed with long fibers in realistic process conditions at VTT's pilot environment. Our scope is on long-fiber suspensions that can still be run on existing paper machine geometries. The average fiber length and foam density were the main variables in these trials. The formation of papers made of short fibers was always very good. For longer fibers formation improved with decreasing foam density and was much better than that of water-laid samples. Long fibers were found to increase the bulk and the tensile index, but to decrease the z-strength.

AB - The paper industry is continuously seeking possible solutions for new fiber based products to widen their product portfolio and to develop more valuable products. For the current products the technologies enabling the reduction of the raw material consumption and improvement of the energy and water efficiency are under great interest. This is a challenging goal since the quality of the end product should simultaneously remain intact. In a water-laid process the challenge to improve formation increases with increasing fiber length. To date the only solution has been to decrease the forming consistency. However, when using foam as a carrier fluid flocculation of fibers is decreased and fiber length can be increased. Foam forming studies have been performed with long fibers in realistic process conditions at VTT's pilot environment. Our scope is on long-fiber suspensions that can still be run on existing paper machine geometries. The average fiber length and foam density were the main variables in these trials. The formation of papers made of short fibers was always very good. For longer fibers formation improved with decreasing foam density and was much better than that of water-laid samples. Long fibers were found to increase the bulk and the tensile index, but to decrease the z-strength.

KW - crowding number

KW - flocculation

KW - foam forming

KW - formation

KW - long fiber

U2 - 10.3183/NPPRJ-2016-31-02-p239-247

DO - 10.3183/NPPRJ-2016-31-02-p239-247

M3 - Article

VL - 31

SP - 239

EP - 247

JO - Nordic Pulp and Paper Research Journal

JF - Nordic Pulp and Paper Research Journal

SN - 0283-2631

IS - 2

ER -