A method for producing fibrillar fines directly from wood

Research output: Contribution to conferenceConference AbstractScientific

Abstract

For economic and ecological reasons there is a strong demand to reduce grammage of cartons and printing papers. The challenge is to maintain strength, bending stiffness and opacity. Previous studies have shown that in carton boards the bulk of the middle layer can be raised up to 30%without strength losses by binding stiff fibers together with fines separated from chemical or mechanical pulps. Such effects would be difficult to obtain by adjustments in refining. Furthermore, mechanical pulp fines have high light scattering and strong synergy with fibers with respect to tensile strength. A separate production of fines would provide innovative options for furnish preparation, in order to tailor product properties, to reduce mainline mechanical pulping energy demand, and to reduce kraft pulp usage. We have developed a novel method to produce fibrillar fines directly from moist wood. The method applies traditional wood grinder machine equipped with a novel patented stone surface. The fines content (P200) of such grinder pit pulp is typically 80-95 %. The quality of the fines can be adjusted with the structure of the grinding stone surface and the production rate. The first trials yielded in hand sheets having tensile index from 40 to 60 Nm/g and light scattering coefficient from 54 to 74 m2/kg. For comparison, the fines separated from a well refined TMP-reject had tensile index 50 Nm/g and light scattering coefficient 76 m2/kg. This presentation introduces the novel method and highlights the main observations from the first trials. The fines are expected to be suitable for strengthening paper and board, as well as for organic filler with positive strengthening effect. In addition, wood fines could be an interesting material for wood containing filaments used in 3D-printing.
Original languageEnglish
Publication statusPublished - 2017
Event10th Fundamental Mechanical Pulp Research Seminar, FMPRS 2017 - Sokos Hotel Paviljonki, Jyväskylä, Finland
Duration: 13 Jun 201714 Jun 2017
http://afrc.fi/fmprs2017/ (Web page)

Conference

Conference10th Fundamental Mechanical Pulp Research Seminar, FMPRS 2017
Abbreviated titleFMPRS 2017
CountryFinland
CityJyväskylä
Period13/06/1714/06/17
Internet address

Fingerprint

light scattering
mechanical pulp
grinders
mechanical pulping
fillers (equipment)
chemical pulp
kraft pulp
bending strength
opacity
refining
grinding
tensile strength
methodology
strength (mechanics)
pulp
hands
economics
energy

Keywords

  • wood
  • log
  • fines
  • lignocellulosic fines
  • paper
  • board
  • strength
  • light scattering

Cite this

Nurminen, I., Saharinen, E., & Sirviö, J. (2017). A method for producing fibrillar fines directly from wood. Abstract from 10th Fundamental Mechanical Pulp Research Seminar, FMPRS 2017, Jyväskylä, Finland.
Nurminen, Ilkka ; Saharinen, Erkki ; Sirviö, Jari. / A method for producing fibrillar fines directly from wood. Abstract from 10th Fundamental Mechanical Pulp Research Seminar, FMPRS 2017, Jyväskylä, Finland.
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title = "A method for producing fibrillar fines directly from wood",
abstract = "For economic and ecological reasons there is a strong demand to reduce grammage of cartons and printing papers. The challenge is to maintain strength, bending stiffness and opacity. Previous studies have shown that in carton boards the bulk of the middle layer can be raised up to 30{\%}without strength losses by binding stiff fibers together with fines separated from chemical or mechanical pulps. Such effects would be difficult to obtain by adjustments in refining. Furthermore, mechanical pulp fines have high light scattering and strong synergy with fibers with respect to tensile strength. A separate production of fines would provide innovative options for furnish preparation, in order to tailor product properties, to reduce mainline mechanical pulping energy demand, and to reduce kraft pulp usage. We have developed a novel method to produce fibrillar fines directly from moist wood. The method applies traditional wood grinder machine equipped with a novel patented stone surface. The fines content (P200) of such grinder pit pulp is typically 80-95 {\%}. The quality of the fines can be adjusted with the structure of the grinding stone surface and the production rate. The first trials yielded in hand sheets having tensile index from 40 to 60 Nm/g and light scattering coefficient from 54 to 74 m2/kg. For comparison, the fines separated from a well refined TMP-reject had tensile index 50 Nm/g and light scattering coefficient 76 m2/kg. This presentation introduces the novel method and highlights the main observations from the first trials. The fines are expected to be suitable for strengthening paper and board, as well as for organic filler with positive strengthening effect. In addition, wood fines could be an interesting material for wood containing filaments used in 3D-printing.",
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author = "Ilkka Nurminen and Erkki Saharinen and Jari Sirvi{\"o}",
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year = "2017",
language = "English",
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Nurminen, I, Saharinen, E & Sirviö, J 2017, 'A method for producing fibrillar fines directly from wood' 10th Fundamental Mechanical Pulp Research Seminar, FMPRS 2017, Jyväskylä, Finland, 13/06/17 - 14/06/17, .

A method for producing fibrillar fines directly from wood. / Nurminen, Ilkka; Saharinen, Erkki; Sirviö, Jari.

2017. Abstract from 10th Fundamental Mechanical Pulp Research Seminar, FMPRS 2017, Jyväskylä, Finland.

Research output: Contribution to conferenceConference AbstractScientific

TY - CONF

T1 - A method for producing fibrillar fines directly from wood

AU - Nurminen, Ilkka

AU - Saharinen, Erkki

AU - Sirviö, Jari

N1 - The seminar was documented with abstract book and distributed pdf-slides.

PY - 2017

Y1 - 2017

N2 - For economic and ecological reasons there is a strong demand to reduce grammage of cartons and printing papers. The challenge is to maintain strength, bending stiffness and opacity. Previous studies have shown that in carton boards the bulk of the middle layer can be raised up to 30%without strength losses by binding stiff fibers together with fines separated from chemical or mechanical pulps. Such effects would be difficult to obtain by adjustments in refining. Furthermore, mechanical pulp fines have high light scattering and strong synergy with fibers with respect to tensile strength. A separate production of fines would provide innovative options for furnish preparation, in order to tailor product properties, to reduce mainline mechanical pulping energy demand, and to reduce kraft pulp usage. We have developed a novel method to produce fibrillar fines directly from moist wood. The method applies traditional wood grinder machine equipped with a novel patented stone surface. The fines content (P200) of such grinder pit pulp is typically 80-95 %. The quality of the fines can be adjusted with the structure of the grinding stone surface and the production rate. The first trials yielded in hand sheets having tensile index from 40 to 60 Nm/g and light scattering coefficient from 54 to 74 m2/kg. For comparison, the fines separated from a well refined TMP-reject had tensile index 50 Nm/g and light scattering coefficient 76 m2/kg. This presentation introduces the novel method and highlights the main observations from the first trials. The fines are expected to be suitable for strengthening paper and board, as well as for organic filler with positive strengthening effect. In addition, wood fines could be an interesting material for wood containing filaments used in 3D-printing.

AB - For economic and ecological reasons there is a strong demand to reduce grammage of cartons and printing papers. The challenge is to maintain strength, bending stiffness and opacity. Previous studies have shown that in carton boards the bulk of the middle layer can be raised up to 30%without strength losses by binding stiff fibers together with fines separated from chemical or mechanical pulps. Such effects would be difficult to obtain by adjustments in refining. Furthermore, mechanical pulp fines have high light scattering and strong synergy with fibers with respect to tensile strength. A separate production of fines would provide innovative options for furnish preparation, in order to tailor product properties, to reduce mainline mechanical pulping energy demand, and to reduce kraft pulp usage. We have developed a novel method to produce fibrillar fines directly from moist wood. The method applies traditional wood grinder machine equipped with a novel patented stone surface. The fines content (P200) of such grinder pit pulp is typically 80-95 %. The quality of the fines can be adjusted with the structure of the grinding stone surface and the production rate. The first trials yielded in hand sheets having tensile index from 40 to 60 Nm/g and light scattering coefficient from 54 to 74 m2/kg. For comparison, the fines separated from a well refined TMP-reject had tensile index 50 Nm/g and light scattering coefficient 76 m2/kg. This presentation introduces the novel method and highlights the main observations from the first trials. The fines are expected to be suitable for strengthening paper and board, as well as for organic filler with positive strengthening effect. In addition, wood fines could be an interesting material for wood containing filaments used in 3D-printing.

KW - wood

KW - log

KW - fines

KW - lignocellulosic fines

KW - paper

KW - board

KW - strength

KW - light scattering

M3 - Conference Abstract

ER -

Nurminen I, Saharinen E, Sirviö J. A method for producing fibrillar fines directly from wood. 2017. Abstract from 10th Fundamental Mechanical Pulp Research Seminar, FMPRS 2017, Jyväskylä, Finland.