Web cleaning – why?

Every moving web will charge, the less conductive the substrate is, the stronger the charge will be. Even moist and temperature do influence the level of charging. As an electrically charged web tries to keep the contamination stick to its surface, a neutralization of this static load is necessary for a good result. KELVA offers several solutions for discharging the web, from a simple carbon fiber brush that grounds the web, to high-efficient active dischargers integrated in our Cleanflow solutions.

The KELVA solution opens the boundary layer by limiting its thickness mechanically and turning it into turbulent air.  As soon as the web enters the cleaner this layer is absorbed by the cleaner together with the contaminations. Depending on the material cleaned, KELVA offers special solutions that contain mechanical barriers inside the cleaning process, breaking the boundary layer completely but inside the cleaner and thus catching the launched particles. KELVA provides a wide variety of made-to-measure web cleaning solutions – contact as well as non-contact. We offer you the benefit of using our know-how gathered in over 40 years experience in web cleaning, building over 7.000 installations worldwide. We invite you to take a look at our application gallery, where projects in various industries are shown. We will be glad to answer your questions! Let your web contamination problem be solved by the pioneers of web cleaning.

Depending on the material of the substrate and web speed, a layer of air is carried along by the moving web, containing debris, such as particles and fibers caused  through the production process, static charge or environmental conditions. These contaminations on the web are very difficult to remove while “protected” by and “closed into” this (air) layer.

The KELVA Web cleaner is designed to break the boundary layer, release and collect the particles to prevent them from spreading to the surrounding air and then appear on the web again.