Advanced hot-melt adhesive solutions for today’s filtration industry. The potential of actual hot-melts and their adequate precision application technologies, presented upon the example of pre-laminating and assembling an automotive filter

G. Schürmann*, ITW Dynatec GmbH , Germany

While hot melt adhesives were initially mainly used for quick and efficient, but typically not technically ambitious bonding tasks, modern, “state-of-the-art” hot-melt adhesives and precision application technologies provide highly sophisticated solutions for many ambitious markets, such as Tapes & Labels, DHP as well as durable and reliable bonding or lamination solutions for the automotive industry. Especially when it comes to filtration, modern hot melt adhesives and the adequate precision application systems offer significant technical, commercial and environmental advantages over common solvent- or water-based systems.

Today’s hot melt adhesives are available in an enormous variety, from thermoplastic to thermoset versions or from stiff to flexible bonding, and can, at the same time, provide additional functionalities, such as optical effects, UV protection, flame retardant or water repellent properties, etc.

State of the art adhesive application systems can for example apply a closed (barrier) film with less than 1 g/m2, just as well as almost any desired open/breathable pattern with random or uniform fiber distribution, assuring a well-defined, reproducible and minimal pressure drop.

Especially when it comes to filtration there are typically several different adhesive application systems involved in the production process. On the one hand there are uniform or random fiber-spray systems used that can laminate woven or non-woven filter media, together with low to no pressure drop in the semi-finished filtration composite. And even complex structures, such as tri-laminated composites including activated charcoal can be laminated in just one single production step. Due to the industries request for continuous process improvements and further increasing production speeds, the chosen application systems need to act with high precision and intermittent frequencies of just a few milliseconds...

Session: F3 - Filter Media - Advanced Manufacturing Methods I
Day: 13 October 2016
Time: 09:00 - 10:15 h

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