Chemical and morphological changes in fibre structure due to material heating during ultrasonic-assisted embossing of cardboard

Research output: Contribution to journalResearch articleContributedpeer-review

Contributors

  • Ulrike Käppler - , Leipzig University of Applied Sciences (Author)
  • Jennes Hünniger - , Leipzig University of Applied Sciences (Author)
  • André Hofmann - , Chair of Processing Machines/ Processing Technology (Author)
  • Simon Hamblyn - , Leipzig University of Applied Sciences (Author)
  • Andrea Berlich - , Leipzig University of Applied Sciences (Author)
  • Lutz Engisch - , Leipzig University of Applied Sciences (Author)

Abstract

Embossing is a commonly used design element on printed products and packaging. It enhances the product impression with optical and haptic effects. The material deformation during the embossing of cardboard is normally done using high mechanical pressure between two dies. The use of ultrasound in the embossing process leads to a noticeable reduction of the embossing pressure and a greater embossing precision. However, there is a noticeable heating of the cardboard during the ultrasonic-assisted embossing process. This work aimed to characterise the effects of heating and to understand the reasons for the greater precision with decreased force when ultrasound is used. Therefore, the effects of the thermal ultrasonic energy on the chemical composition and the morphological properties of the fibres were investigated. The findings showed that no noticeable changes occurred in the chemical composition or fibre geometry as a result of the embossing process with ultrasound.

Details

Original languageEnglish
Pages (from-to)546-557
Number of pages12
JournalBioResources
Volume16
Issue number1
Publication statusPublished - 2021
Peer-reviewedYes

External IDs

Scopus 85137568933

Keywords

Keywords

  • ATR-IR spectroscopy, Embossing, Raman spectroscopy, Single fibre analysis, Ultrasound, Embossing, Cardboard, ATR-IR spectroscopy, Raman spectroscopy