Pits as natural irregularities in softwood fibers

Jari Sirviö, Petri Kärenlampi

Research output: Contribution to journalArticleScientificpeer-review

26 Citations (Scopus)

Abstract

Parameters for pit size, shape, orientation, and density, and their correlations with fiber dimensions in Scots pine and Norway spruce fibers were determined. Bordered pits were smaller with greater cross-sectional fiber area, and more circular the wider the fibers. Angular pit orientation became more transverse in pine fibers, and pit density increased in both species with fiber width. Normalized pit size and pit density increased towards fiber tips, especially in thin-walled pine fibers. These observations can be explained by the developing process and the functional role of tracheids in wood. The appearance of pits as stress-enhancing irregularities in fiber structure should be considered in fiber-network theories predicting paper properties, as well as in the measurement of the mechanical properties of fibers.
Original languageEnglish
Pages (from-to)27-39
JournalWood and Fiber Science
Volume30
Publication statusPublished - 1998
MoE publication typeA1 Journal article-refereed

Fingerprint

Softwoods
softwood
Fibers
Pinus
tracheids
Pinus sylvestris
Picea abies
mechanical properties
fibre
functional role
Circuit theory
mechanical property
Wood

Keywords

  • Pinus sylvestris
  • kuidut
  • Picea abies

Cite this

Sirviö, Jari ; Kärenlampi, Petri. / Pits as natural irregularities in softwood fibers. In: Wood and Fiber Science. 1998 ; Vol. 30. pp. 27-39.
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Pits as natural irregularities in softwood fibers. / Sirviö, Jari; Kärenlampi, Petri.

In: Wood and Fiber Science, Vol. 30, 1998, p. 27-39.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Pits as natural irregularities in softwood fibers

AU - Sirviö, Jari

AU - Kärenlampi, Petri

PY - 1998

Y1 - 1998

N2 - Parameters for pit size, shape, orientation, and density, and their correlations with fiber dimensions in Scots pine and Norway spruce fibers were determined. Bordered pits were smaller with greater cross-sectional fiber area, and more circular the wider the fibers. Angular pit orientation became more transverse in pine fibers, and pit density increased in both species with fiber width. Normalized pit size and pit density increased towards fiber tips, especially in thin-walled pine fibers. These observations can be explained by the developing process and the functional role of tracheids in wood. The appearance of pits as stress-enhancing irregularities in fiber structure should be considered in fiber-network theories predicting paper properties, as well as in the measurement of the mechanical properties of fibers.

AB - Parameters for pit size, shape, orientation, and density, and their correlations with fiber dimensions in Scots pine and Norway spruce fibers were determined. Bordered pits were smaller with greater cross-sectional fiber area, and more circular the wider the fibers. Angular pit orientation became more transverse in pine fibers, and pit density increased in both species with fiber width. Normalized pit size and pit density increased towards fiber tips, especially in thin-walled pine fibers. These observations can be explained by the developing process and the functional role of tracheids in wood. The appearance of pits as stress-enhancing irregularities in fiber structure should be considered in fiber-network theories predicting paper properties, as well as in the measurement of the mechanical properties of fibers.

KW - Pinus sylvestris

KW - kuidut

KW - Picea abies

M3 - Article

VL - 30

SP - 27

EP - 39

JO - Wood and Fiber Science

JF - Wood and Fiber Science

SN - 0735-6161

ER -