HANNOVER MESSE 2020, 20 - 24 April
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Clever ungluing

Logo Karlsruher Institut für Technologie


Karlsruher Institut für Technologie

Exhibitor details
Exhibitor details
Logo Clever ungluing

Product description

In industrial joining technology, gluing is increasingly replacing methods such as riveting or welding. Glues reduce the overall weight of joined components and perform further functions such as sealing or insulating. However, industrially used glues are usually irreversible - loosening the adhesive bond, e.g. during repairs or in recycling, may damage or even destroy the individual components. Here, the use of adhesive bonds that can be deglued would make more sense. As a rule, the glue is heated or irradiated, which reduces its solidity, so that components can be loosened from one another. However, conventional methods are either tedious if careful heating is required, or they consume large amounts of energy, since only greater heat of up to 200 degrees Celsius makes the glue melt. At the KIT Institute for Chemical Technology and Polymer Chemistry (ICTP), scientists have developed a thermolabile glue that can already be removed at more moderate temperatures, below 100 degrees Celsius, but nevertheless remains stable at room temperatures. This is enabled by the chemical composition of the glue. Its chief component is a thermolabile polymerisation resin combined with further functionalising additives: polyfunctional co-monomers to dilute the glue, thermolabile monomers for improved connecting properties and bulking agents to adjust viscosity. Furthermore, so-called radiation-heat converters are added that turn electromagnetic radiation into heat in order to intensify the heat effect. This mixture makes the glue removable under moderate heat impact or the influence of UV light.

You can get an overview of this technology at KIT stand. Detailed information can be exchanged individually in contact with the responsible scientific employees of KIT after the industry fair.

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