Density profiles of novel kraft pulp and TMP based foam formed thermal insulation materials observed by X-ray tomography and densitometry

Michael Lecourt (Corresponding Author), Tiina Pöhler, Joanna Hornatowska, Lennart Salmén, Petri Jetsu

Research output: Contribution to journalArticleScientificpeer-review

1 Citation (Scopus)

Abstract

X-ray tomography and densitometry (XRT and XRD) were applied to characterise wood fibre based insulation materials, which were produced by the foam forming technology. XRT is a high resolution approach with long measurement times of around 29 h, while XRD measurement needs only a few minutes. The determination of density distribution of boards in the thickness direction was the focus of this study. Both approaches visualised well the impact of raw materials and manufacturing processes on the structure of the panels. The density profiles were dependent on the pulp applied for panel production, and the processing conditions were also influential. Air flow resistance correlated with the maximum density measured inside the board. Both XRT and XRD revealed similar trends, which are useful for the characterisation of insulation materials.

Original languageEnglish
Pages (from-to)397-403
Number of pages7
JournalHolzforschung
Volume72
Issue number5
DOIs
Publication statusPublished - 25 Apr 2018
MoE publication typeA1 Journal article-refereed

Fingerprint

Thymidine Monophosphate
Kraft pulp
Thermal insulation
Tomography
Foams
Insulation
X rays
Time measurement
Pulp
Wood
Raw materials
Fibers
Processing
Air
Direction compound

Keywords

  • bleached kraft pulps
  • foam forming
  • insulation
  • structure definition
  • wood fibres
  • X-ray densitometry
  • X-ray tomography

Cite this

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abstract = "X-ray tomography and densitometry (XRT and XRD) were applied to characterise wood fibre based insulation materials, which were produced by the foam forming technology. XRT is a high resolution approach with long measurement times of around 29 h, while XRD measurement needs only a few minutes. The determination of density distribution of boards in the thickness direction was the focus of this study. Both approaches visualised well the impact of raw materials and manufacturing processes on the structure of the panels. The density profiles were dependent on the pulp applied for panel production, and the processing conditions were also influential. Air flow resistance correlated with the maximum density measured inside the board. Both XRT and XRD revealed similar trends, which are useful for the characterisation of insulation materials.",
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Density profiles of novel kraft pulp and TMP based foam formed thermal insulation materials observed by X-ray tomography and densitometry. / Lecourt, Michael (Corresponding Author); Pöhler, Tiina; Hornatowska, Joanna; Salmén, Lennart; Jetsu, Petri.

In: Holzforschung, Vol. 72, No. 5, 25.04.2018, p. 397-403.

Research output: Contribution to journalArticleScientificpeer-review

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T1 - Density profiles of novel kraft pulp and TMP based foam formed thermal insulation materials observed by X-ray tomography and densitometry

AU - Lecourt, Michael

AU - Pöhler, Tiina

AU - Hornatowska, Joanna

AU - Salmén, Lennart

AU - Jetsu, Petri

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AB - X-ray tomography and densitometry (XRT and XRD) were applied to characterise wood fibre based insulation materials, which were produced by the foam forming technology. XRT is a high resolution approach with long measurement times of around 29 h, while XRD measurement needs only a few minutes. The determination of density distribution of boards in the thickness direction was the focus of this study. Both approaches visualised well the impact of raw materials and manufacturing processes on the structure of the panels. The density profiles were dependent on the pulp applied for panel production, and the processing conditions were also influential. Air flow resistance correlated with the maximum density measured inside the board. Both XRT and XRD revealed similar trends, which are useful for the characterisation of insulation materials.

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KW - insulation

KW - structure definition

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