Hotmelt PSA

Curing hotmelt PSAs with Hoenle UV systems ensures efficient production, maximum flexibility and optimal performance for labels, tapes, and specialty applications.

UV hotmelt adhesives are based on acrylates. UV light triggers the crosslinking reaction of these UV-curable adhesives. Both process and product characteristics can be precisely controlled: by adjusting the UV dose, adhesion (tack) and cohesion (internal strength) of the PSA film can be finely tuned.

UV-acrylate hotmelt PSAs offer outstanding flexibility in adhesive performance. Starting from a single base formulation, a wide range of properties can be achieved simply by varying the UV exposure – from high cohesion to strong tack. They also provide superior durability, with excellent heat stability, resistance to UV and oxygen (avoiding embrittlement or yellowing), and high moisture resistance, outperforming SIS hotmelt alternatives. In addition, they allow lower processing temperatures and are solvent-free, enabling safer and more sustainable operations. Their variable curing levels also provide strong operational flexibility, making them adaptable to different adhesive types and processing conditions.

The properties of UV-acrylate hotmelt adhesives makes them particularly well-suited for labels, tapes, and specialty adhesive applications where precise tuning of adhesion and cohesion is critical. They are especially advantageous in coating and laminating lines that demand consistent, energy-efficient, and reproducible curing. With our state-of-the-art UV curing modules, adhesive performance can be customized directly through controlled UV exposure – delivering optimized results for a broad range of pressure-sensitive applications.

Do you have any questions or need support for our Curing Solutions? We are happy to help you.