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Conception d'étiquettes autoadhésives par microencapsulation d'adhésif

Abstract : The main objective of this investigation is to prepare innovative silicone liner-free labels. It can be achieved by the adhesive ‘self protection', thanks to its incorporation into microcapsules. This allows the preparation of ‘dry labels' gluing under the application of a pressure, which induces the rupture of the microcapsules, thus releasing the core material, a pressure sensitive adhesive. The first step was to analyse 3 water-based PSA in view of their encapsulation. Then, the most suitable adhesive was microencapsulated by coacervation (using biopolymer as shell) and by in situ polymerisation. Two other encapsulation processes (spray-cooling and spray-drying), were also carried out at the LAGEP and were compared with the 2 former processes. Coating colour formulations were prepared with spray-cooling microcapsules (the most adhesive ones). Coating trials were carried out with a Meyer rod, and by screen printing. Compatibility between microcapsules and the label making process, using a flexographic printing press, was determined. Finally, the mains characteristics of the prepared innovative products (adhesion, application pressure) were compared to industrial self-adhesive homologues, and found that they could be suitable for the preparation of silicon liner-free envelops and stamps.
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https://tel.archives-ouvertes.fr/tel-01124085
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Submitted on : Friday, March 6, 2015 - 3:52:35 AM
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2012GRENI051.pdf
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  • HAL Id : tel-01124085, version 1

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STAR | CNRS | LGP2 | UGA

Citation

Robin Abderrahmen. Conception d'étiquettes autoadhésives par microencapsulation d'adhésif. Autre. Université de Grenoble, 2012. Français. ⟨NNT : 2012GRENI051⟩. ⟨tel-01124085⟩

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