Understanding Extensibility of Paper: Role of Fiber Elongation and Fiber Bonding

Jarmo Kouko, Tuomas Turpeinen, Artem Kulachenko, Ulrich Hirn, E Retulainen

Research output: Contribution to conferenceConference AbstractScientific

Abstract

The tensile tests of individual bleached softwood kraft pulp fibers and sheets and micromechanical simulation of fiber network suggest that only a part of the elongation potential of individual fibers is utilized in the elongation of sheet. The stress-strain curves of two actual individual pulp fibers and one artificial fiber were applied to a micromechanical simulation of random fiber networks. The both experimental results and micromechanical simulations indicated that fiber bonding has an important role not only in determining the strength but also the elongation of fiber networks. Additionally, the results indicate that the shape of stress-strain curve of individual pulp fibers may have significant influence on the shape of stress-strain curve of a paper sheet. A large increase in elongation and strength of a paper can be reached only by strengthening fiber-fiber bonding, as demonstrated by the experimental hand sheets with starch and CMF and by the micromechanical simulations. The key conclusion related to this investigation was that simulated uniform inter-fiber bond strength does not have influence on the shape of stress-strain curve of fiber network until the bonds fail, whereas number of bonds have influence on activation of the fiber network and on the shape of stress-strain curve.
Original languageEnglish
Publication statusPublished - 5 May 2018
MoE publication typeNot Eligible
EventInternational Paper Physics Conference at PaperCon, IPPC - Indianapolis, United States
Duration: 5 May 20198 May 2019

Conference

ConferenceInternational Paper Physics Conference at PaperCon, IPPC
Abbreviated titleIPPC
CountryUnited States
CityIndianapolis
Period5/05/198/05/19

Fingerprint

Fiber bonding
Elongation
Fibers
Stress-strain curves
Pulp
Kraft pulp
Softwoods
Starch

Cite this

Kouko, J., Turpeinen, T., Kulachenko, A., Hirn, U., & Retulainen, E. (2018). Understanding Extensibility of Paper: Role of Fiber Elongation and Fiber Bonding. Abstract from International Paper Physics Conference at PaperCon, IPPC, Indianapolis, United States.
Kouko, Jarmo ; Turpeinen, Tuomas ; Kulachenko, Artem ; Hirn, Ulrich ; Retulainen, E. / Understanding Extensibility of Paper : Role of Fiber Elongation and Fiber Bonding. Abstract from International Paper Physics Conference at PaperCon, IPPC, Indianapolis, United States.
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abstract = "The tensile tests of individual bleached softwood kraft pulp fibers and sheets and micromechanical simulation of fiber network suggest that only a part of the elongation potential of individual fibers is utilized in the elongation of sheet. The stress-strain curves of two actual individual pulp fibers and one artificial fiber were applied to a micromechanical simulation of random fiber networks. The both experimental results and micromechanical simulations indicated that fiber bonding has an important role not only in determining the strength but also the elongation of fiber networks. Additionally, the results indicate that the shape of stress-strain curve of individual pulp fibers may have significant influence on the shape of stress-strain curve of a paper sheet. A large increase in elongation and strength of a paper can be reached only by strengthening fiber-fiber bonding, as demonstrated by the experimental hand sheets with starch and CMF and by the micromechanical simulations. The key conclusion related to this investigation was that simulated uniform inter-fiber bond strength does not have influence on the shape of stress-strain curve of fiber network until the bonds fail, whereas number of bonds have influence on activation of the fiber network and on the shape of stress-strain curve.",
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note = "International Paper Physics Conference at PaperCon, IPPC, IPPC ; Conference date: 05-05-2019 Through 08-05-2019",

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Kouko, J, Turpeinen, T, Kulachenko, A, Hirn, U & Retulainen, E 2018, 'Understanding Extensibility of Paper: Role of Fiber Elongation and Fiber Bonding' International Paper Physics Conference at PaperCon, IPPC, Indianapolis, United States, 5/05/19 - 8/05/19, .

Understanding Extensibility of Paper : Role of Fiber Elongation and Fiber Bonding. / Kouko, Jarmo; Turpeinen, Tuomas; Kulachenko, Artem; Hirn, Ulrich; Retulainen, E.

2018. Abstract from International Paper Physics Conference at PaperCon, IPPC, Indianapolis, United States.

Research output: Contribution to conferenceConference AbstractScientific

TY - CONF

T1 - Understanding Extensibility of Paper

T2 - Role of Fiber Elongation and Fiber Bonding

AU - Kouko, Jarmo

AU - Turpeinen, Tuomas

AU - Kulachenko, Artem

AU - Hirn, Ulrich

AU - Retulainen, E

PY - 2018/5/5

Y1 - 2018/5/5

N2 - The tensile tests of individual bleached softwood kraft pulp fibers and sheets and micromechanical simulation of fiber network suggest that only a part of the elongation potential of individual fibers is utilized in the elongation of sheet. The stress-strain curves of two actual individual pulp fibers and one artificial fiber were applied to a micromechanical simulation of random fiber networks. The both experimental results and micromechanical simulations indicated that fiber bonding has an important role not only in determining the strength but also the elongation of fiber networks. Additionally, the results indicate that the shape of stress-strain curve of individual pulp fibers may have significant influence on the shape of stress-strain curve of a paper sheet. A large increase in elongation and strength of a paper can be reached only by strengthening fiber-fiber bonding, as demonstrated by the experimental hand sheets with starch and CMF and by the micromechanical simulations. The key conclusion related to this investigation was that simulated uniform inter-fiber bond strength does not have influence on the shape of stress-strain curve of fiber network until the bonds fail, whereas number of bonds have influence on activation of the fiber network and on the shape of stress-strain curve.

AB - The tensile tests of individual bleached softwood kraft pulp fibers and sheets and micromechanical simulation of fiber network suggest that only a part of the elongation potential of individual fibers is utilized in the elongation of sheet. The stress-strain curves of two actual individual pulp fibers and one artificial fiber were applied to a micromechanical simulation of random fiber networks. The both experimental results and micromechanical simulations indicated that fiber bonding has an important role not only in determining the strength but also the elongation of fiber networks. Additionally, the results indicate that the shape of stress-strain curve of individual pulp fibers may have significant influence on the shape of stress-strain curve of a paper sheet. A large increase in elongation and strength of a paper can be reached only by strengthening fiber-fiber bonding, as demonstrated by the experimental hand sheets with starch and CMF and by the micromechanical simulations. The key conclusion related to this investigation was that simulated uniform inter-fiber bond strength does not have influence on the shape of stress-strain curve of fiber network until the bonds fail, whereas number of bonds have influence on activation of the fiber network and on the shape of stress-strain curve.

M3 - Conference Abstract

ER -

Kouko J, Turpeinen T, Kulachenko A, Hirn U, Retulainen E. Understanding Extensibility of Paper: Role of Fiber Elongation and Fiber Bonding. 2018. Abstract from International Paper Physics Conference at PaperCon, IPPC, Indianapolis, United States.