Effect of polyurethane addition on the strength, extensibility and 3D formability of paper and board

Research output: Contribution to conferenceConference articleScientific

Abstract

The extensibility and strength of fibre networks can be improved by modifying fibre material mechanically and by adding of polymers. Polyurethane (PU) is known to have interesting properties, like high extensibility. It was found, that the polyurethane dispersions can be effectively added to wet and dry paper by spraying on, as well as by wet-end addition to pulp suspension. In the wet end addition the retention of PU in paper is quite poor; however, it can be improved by fixing of PU by using a low molecular weight highly charged polymer. The improvements in extensibility increase with the amount of polyurethane retained in paper. However, considering the high extensibility (450%) of polyurethane the stiffness of the fibres and fibre network dominate the result. The adhesion of PU with paper, and the softening behavior (by DMTA tests), and surface energy measurements suggest that the compatibility of PU and kraft pulp could be better. Improvements are assumed to be due to the reasonable adhesion to fibres and thus fibres are connected by a material that has higher compliance than cellulosic material. The respective increase in extensibility was accompanied by relevant improvements in 2D- and 3D-formability.
Original languageEnglish
Publication statusPublished - 2016
EventPaper & Biorefinery Conference - Graz, Austria
Duration: 11 May 201612 May 2016

Conference

ConferencePaper & Biorefinery Conference
CountryAustria
CityGraz
Period11/05/1612/05/16

Fingerprint

Formability
Polyurethanes
Fibers
Adhesion
Electric power measurement
Kraft pulp
Surface measurement
Polymers
Spraying
Dispersions
Interfacial energy
Pulp
Molecular weight
Stiffness

Keywords

  • extensibility
  • formability
  • polyurethane
  • refining

Cite this

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title = "Effect of polyurethane addition on the strength, extensibility and 3D formability of paper and board",
abstract = "The extensibility and strength of fibre networks can be improved by modifying fibre material mechanically and by adding of polymers. Polyurethane (PU) is known to have interesting properties, like high extensibility. It was found, that the polyurethane dispersions can be effectively added to wet and dry paper by spraying on, as well as by wet-end addition to pulp suspension. In the wet end addition the retention of PU in paper is quite poor; however, it can be improved by fixing of PU by using a low molecular weight highly charged polymer. The improvements in extensibility increase with the amount of polyurethane retained in paper. However, considering the high extensibility (450{\%}) of polyurethane the stiffness of the fibres and fibre network dominate the result. The adhesion of PU with paper, and the softening behavior (by DMTA tests), and surface energy measurements suggest that the compatibility of PU and kraft pulp could be better. Improvements are assumed to be due to the reasonable adhesion to fibres and thus fibres are connected by a material that has higher compliance than cellulosic material. The respective increase in extensibility was accompanied by relevant improvements in 2D- and 3D-formability.",
keywords = "extensibility, formability, polyurethane, refining",
author = "Alexey Vishtal and Alexey Khakalo and Jarmo Kouko and Elias Retulainen",
note = "Project : 101983 ; Paper & Biorefinery Conference ; Conference date: 11-05-2016 Through 12-05-2016",
year = "2016",
language = "English",

}

Vishtal, A, Khakalo, A, Kouko, J & Retulainen, E 2016, 'Effect of polyurethane addition on the strength, extensibility and 3D formability of paper and board' Paper presented at Paper & Biorefinery Conference, Graz, Austria, 11/05/16 - 12/05/16, .

Effect of polyurethane addition on the strength, extensibility and 3D formability of paper and board. / Vishtal, Alexey; Khakalo, Alexey; Kouko, Jarmo; Retulainen, Elias.

2016. Paper presented at Paper & Biorefinery Conference, Graz, Austria.

Research output: Contribution to conferenceConference articleScientific

TY - CONF

T1 - Effect of polyurethane addition on the strength, extensibility and 3D formability of paper and board

AU - Vishtal, Alexey

AU - Khakalo, Alexey

AU - Kouko, Jarmo

AU - Retulainen, Elias

N1 - Project : 101983

PY - 2016

Y1 - 2016

N2 - The extensibility and strength of fibre networks can be improved by modifying fibre material mechanically and by adding of polymers. Polyurethane (PU) is known to have interesting properties, like high extensibility. It was found, that the polyurethane dispersions can be effectively added to wet and dry paper by spraying on, as well as by wet-end addition to pulp suspension. In the wet end addition the retention of PU in paper is quite poor; however, it can be improved by fixing of PU by using a low molecular weight highly charged polymer. The improvements in extensibility increase with the amount of polyurethane retained in paper. However, considering the high extensibility (450%) of polyurethane the stiffness of the fibres and fibre network dominate the result. The adhesion of PU with paper, and the softening behavior (by DMTA tests), and surface energy measurements suggest that the compatibility of PU and kraft pulp could be better. Improvements are assumed to be due to the reasonable adhesion to fibres and thus fibres are connected by a material that has higher compliance than cellulosic material. The respective increase in extensibility was accompanied by relevant improvements in 2D- and 3D-formability.

AB - The extensibility and strength of fibre networks can be improved by modifying fibre material mechanically and by adding of polymers. Polyurethane (PU) is known to have interesting properties, like high extensibility. It was found, that the polyurethane dispersions can be effectively added to wet and dry paper by spraying on, as well as by wet-end addition to pulp suspension. In the wet end addition the retention of PU in paper is quite poor; however, it can be improved by fixing of PU by using a low molecular weight highly charged polymer. The improvements in extensibility increase with the amount of polyurethane retained in paper. However, considering the high extensibility (450%) of polyurethane the stiffness of the fibres and fibre network dominate the result. The adhesion of PU with paper, and the softening behavior (by DMTA tests), and surface energy measurements suggest that the compatibility of PU and kraft pulp could be better. Improvements are assumed to be due to the reasonable adhesion to fibres and thus fibres are connected by a material that has higher compliance than cellulosic material. The respective increase in extensibility was accompanied by relevant improvements in 2D- and 3D-formability.

KW - extensibility

KW - formability

KW - polyurethane

KW - refining

M3 - Conference article

ER -