Fiber length distribution and sheet properties: Some new considerations

Sabine Heinemann; Tuomo Hjelt; Erkki Saharinen; Jari Sirviö

Fiber length distribution and sheet properties: Some new considerations

Sabine Heinemann, Tuomo Hjelt, Erkki Saharinen, Jari Sirviö

Research output: Contribution to conference › Conference article › Professional

Abstract

Although fiber length is one of the most often measured property of paper raw materials, the pure effect of it on paper properties is not usually clear. The reason for that is the difficulty to vary only the fiber length while other properties such as fiber width are kept unchanged. To get a more accurate understanding of the significance of fiber length, fractions with different narrow-distributed fiber lengths were produced in the laboratory from the same original pulp by using a defined cutting procedure, which enables to change only the length dimension of fibers but keeping other properties such as fiber width rather unchanged. Commercial pulps - bleached kraft pine pulp, and spruce CTMP - were used as fiber material. The fiber dimensions and related properties of the resulting fiber material were determined with kajaani FiberLabT. Handsheets were produced following a certain procedure and subsequently treated in a laboratory calender to investigate the effect of fiber length especially on surface and strength properties. As results, the development of surface roughness, gloss, apparent density and strength properties (tensile and tear) with a narrow fiber length distributions are presented. A surprising conclusions for the significance of fiber length and its distribution for paper property development is that the fiber length distribution has obviously no significant effect on the strength development if the cross-sectional dimensions of the fibers remain rather unchanged, and that the use of average values is sufficient to describe property developments of paper.

Original language	English
Publication status	Published - 2010
MoE publication type	Not Eligible
Event	International Austrian Paper Conference - Österreichische Papierfachtagung 2010 - Graz, Austria Duration: 19 May 2010 → 20 May 2012

Conference

Conference	International Austrian Paper Conference - Österreichische Papierfachtagung 2010
Country	Austria
City	Graz
Period	19/05/10 → 20/05/12

Fingerprint

Fibers

Pulp

Calenders

Bleached pulp

Kraft pulp

Tensile properties

Raw materials

Surface roughness

Keywords

fiber length
distribution
paper properties
chemical pulp
mechanical pulp

Cite this

Heinemann, S., Hjelt, T., Saharinen, E., & Sirviö, J. (2010). Fiber length distribution and sheet properties: Some new considerations. Paper presented at International Austrian Paper Conference - Österreichische Papierfachtagung 2010, Graz, Austria.

Heinemann, Sabine ; Hjelt, Tuomo ; Saharinen, Erkki ; Sirviö, Jari. / Fiber length distribution and sheet properties : Some new considerations. Paper presented at International Austrian Paper Conference - Österreichische Papierfachtagung 2010, Graz, Austria.

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title = "Fiber length distribution and sheet properties: Some new considerations",

abstract = "Although fiber length is one of the most often measured property of paper raw materials, the pure effect of it on paper properties is not usually clear. The reason for that is the difficulty to vary only the fiber length while other properties such as fiber width are kept unchanged. To get a more accurate understanding of the significance of fiber length, fractions with different narrow-distributed fiber lengths were produced in the laboratory from the same original pulp by using a defined cutting procedure, which enables to change only the length dimension of fibers but keeping other properties such as fiber width rather unchanged. Commercial pulps - bleached kraft pine pulp, and spruce CTMP - were used as fiber material. The fiber dimensions and related properties of the resulting fiber material were determined with kajaani FiberLabT. Handsheets were produced following a certain procedure and subsequently treated in a laboratory calender to investigate the effect of fiber length especially on surface and strength properties. As results, the development of surface roughness, gloss, apparent density and strength properties (tensile and tear) with a narrow fiber length distributions are presented. A surprising conclusions for the significance of fiber length and its distribution for paper property development is that the fiber length distribution has obviously no significant effect on the strength development if the cross-sectional dimensions of the fibers remain rather unchanged, and that the use of average values is sufficient to describe property developments of paper.",

keywords = "fiber length, distribution, paper properties, chemical pulp, mechanical pulp",

author = "Sabine Heinemann and Tuomo Hjelt and Erkki Saharinen and Jari Sirvi{\"o}",

note = "Project code: 38798 Fiber property distributions that give good surface; International Austrian Paper Conference - {\"O}sterreichische Papierfachtagung 2010 ; Conference date: 19-05-2010 Through 20-05-2012",

year = "2010",

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}

Heinemann, S, Hjelt, T , Saharinen, E & Sirviö, J 2010, 'Fiber length distribution and sheet properties: Some new considerations', Paper presented at International Austrian Paper Conference - Österreichische Papierfachtagung 2010, Graz, Austria, 19/05/10 - 20/05/12.

Fiber length distribution and sheet properties : Some new considerations. / Heinemann, Sabine; Hjelt, Tuomo ; Saharinen, Erkki ; Sirviö, Jari.

2010. Paper presented at International Austrian Paper Conference - Österreichische Papierfachtagung 2010, Graz, Austria.

Research output: Contribution to conference › Conference article › Professional

TY - CONF

T1 - Fiber length distribution and sheet properties

T2 - Some new considerations

AU - Heinemann, Sabine

AU - Hjelt, Tuomo

AU - Saharinen, Erkki

AU - Sirviö, Jari

N1 - Project code: 38798 Fiber property distributions that give good surface

PY - 2010

Y1 - 2010

N2 - Although fiber length is one of the most often measured property of paper raw materials, the pure effect of it on paper properties is not usually clear. The reason for that is the difficulty to vary only the fiber length while other properties such as fiber width are kept unchanged. To get a more accurate understanding of the significance of fiber length, fractions with different narrow-distributed fiber lengths were produced in the laboratory from the same original pulp by using a defined cutting procedure, which enables to change only the length dimension of fibers but keeping other properties such as fiber width rather unchanged. Commercial pulps - bleached kraft pine pulp, and spruce CTMP - were used as fiber material. The fiber dimensions and related properties of the resulting fiber material were determined with kajaani FiberLabT. Handsheets were produced following a certain procedure and subsequently treated in a laboratory calender to investigate the effect of fiber length especially on surface and strength properties. As results, the development of surface roughness, gloss, apparent density and strength properties (tensile and tear) with a narrow fiber length distributions are presented. A surprising conclusions for the significance of fiber length and its distribution for paper property development is that the fiber length distribution has obviously no significant effect on the strength development if the cross-sectional dimensions of the fibers remain rather unchanged, and that the use of average values is sufficient to describe property developments of paper.

AB - Although fiber length is one of the most often measured property of paper raw materials, the pure effect of it on paper properties is not usually clear. The reason for that is the difficulty to vary only the fiber length while other properties such as fiber width are kept unchanged. To get a more accurate understanding of the significance of fiber length, fractions with different narrow-distributed fiber lengths were produced in the laboratory from the same original pulp by using a defined cutting procedure, which enables to change only the length dimension of fibers but keeping other properties such as fiber width rather unchanged. Commercial pulps - bleached kraft pine pulp, and spruce CTMP - were used as fiber material. The fiber dimensions and related properties of the resulting fiber material were determined with kajaani FiberLabT. Handsheets were produced following a certain procedure and subsequently treated in a laboratory calender to investigate the effect of fiber length especially on surface and strength properties. As results, the development of surface roughness, gloss, apparent density and strength properties (tensile and tear) with a narrow fiber length distributions are presented. A surprising conclusions for the significance of fiber length and its distribution for paper property development is that the fiber length distribution has obviously no significant effect on the strength development if the cross-sectional dimensions of the fibers remain rather unchanged, and that the use of average values is sufficient to describe property developments of paper.

KW - fiber length

KW - distribution

KW - paper properties

KW - chemical pulp

KW - mechanical pulp

M3 - Conference article

ER -

Heinemann S, Hjelt T , Saharinen E , Sirviö J. Fiber length distribution and sheet properties: Some new considerations. 2010. Paper presented at International Austrian Paper Conference - Österreichische Papierfachtagung 2010, Graz, Austria.