Detecting creep at supra-molecular scales in pulp fibres
|Coordinator||RISE INNVENTIA AB|
|Funding from Vinnova||SEK 500 000|
|Project duration||November 2018 - October 2019|
|Venture||Research infrastructure - utilisation and collaboration|
|Call||Industriella pilotprojekt för neutron- och fotonexperiment vid storskalig forskningsinfrastruktur 2018|
Purpose and goal
Corrugated box failure due to moisture accelerated creep deformations is a cause of significant loss of packaged goods, especially in conditions of varying humidity. The purpose of the study is to establish whether synchrotron-based X-ray scattering techniques can be used to make in-situ observations of the mechanisms involved in the problematic material creep phenomenon.
Expected results and effects
The project will employ X-ray scattering to observe structural changes in the fibres in a paper material sample while they are subjected to load under controlled varying humidity. The expectations are that information will be obtained about changes on scales ranging from the molecular level up to effects on the fibril structure in the fibre wall material. If possible, such measurements would become an efficient tool in the work to develop efficient counter measures to prevent the creep.
Planned approach and implementation
The project will develop a sample environment for tensile testing of paper sheet samples under controlled humidity and temperature. It will subsequently be set up for in-situ mechano-sorptive creep measurements in the P03 beamline at the PETRA III synchrotron in Hamburg, Germany. The study is undertaken by BillerudKorsnäs in cooperation with RISE. However, it is part of a larger research cooperation on corrugated board involving six additional companies along the packaging value chain.