Surface application

Full-surface / Broad hot melt adhesive application via surface application heads.

A wide-slot nozzle is attached to the application head. With this, the adhesive is applied to the substrate over the entire surface and in the desired width.  

The application is carried out with direct contact to the substrate. Because the substrate grinds on the nozzle, the lip is not made of brass or aluminium, but of steel and is partially hardened.
 
Coating widths of between 50 and 500 mm are possible. In order to ensure constant application quantities and widths, only tank systems with gear pumps are used for this type of application.
 
An example of the use of surface application is in applying pressure-sensitive adhesives to self-adhesive equipment for packaging materials.