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Journal Articles Journal of Materials Science Year : 2019

Ultrasonic welding of 100% lignocellulosic papers


Paper-based packaging materials are generally assembled using adhesives formulated with oil-based polymers. These adhesives make the recyclability of the materials more complex and may be the source of material contamination by mineral oil. In view of developing an adhesive-free process, the potential of ultra-sonic compression was investigated in this study. 100% lignocellulosic papers were assembled using an ultrasonic welder dedicated to thermoplastic polymers. For papers containing lignin, the measured peeling strengths were equivalent to those achieved by hot-melt gluing, provided that the water content of papers was well adjusted. At the interface between bonded papers, the fiber network was dense and rather continuous. SEM examinations, 3D X-ray microtomography images, and temperature measurements suggested that the development of adhesion originated to a large extent from a thermoplastic welding mechanism: wood fiber polymers passed their glass transition temperatures, creeped and formed a matrix that coated fibers. Thus, ultrasonic welding appears as an efficient adhesive-free technique for assembling papers that are used in a broad range of packaging applications.


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Dates and versions

hal-02171690 , version 1 (03-07-2019)



Arnaud Regazzi, Jérémie Viguié, Barthelemy Harthong, Pierre J. J. Dumont, Didier Imbault, et al.. Ultrasonic welding of 100% lignocellulosic papers. Journal of Materials Science, 2019, 54 (19), ⟨10.1007/s10853-019-03763-7⟩. ⟨hal-02171690⟩
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