Adhesive is applied to a substrate with a slotted nozzle. The big advantage of a slot nozzle is its closed, hermetically sealed system, which is especially advantageous for reactive Holtmelt. Mostly on webs in a continuous process, but also an intermittent application on substrates, in which this or a slot nozzle is used, is becoming more and more common. Low- and high-viscosity materials are applied with different application thicknesses to a fixed, digitally or analogously adjustable width. The application is therefore mostly in rectangular form. From practically continuous film to completely open-pored, partial application, a wide variety of application patterns are possible. But this also depends on the substrate and its surface. In order to ensure optimum adhesive application, the slit nozzle is heated separately in each case.
- Application width from 2 to 2'500 mm; fixed or adjustable
- Layer thicknesses from 0.002 (approx. 2 gr./m2) to 8 mm
- one or more directly coupled dosing pump(s)
- Special nozzles for e.g. book spine gluing, edge gluing etc.
