Web Cleaner WSI Non-Contact Micro Cleaner effectively removes particles as small as 20 microns.
Web Cleaner WSI Non-Contact Micro Cleaner has a unique ultrasonic nozzle which superimposes high frequency (100 kHz plus) pulses over a high pressure air flow. This pulsation breaks up the boundary layer formed on a moving web and removes the smaller trapped particles.
Unlike contact web cleaners, there are no brushes to load up with particles and re-deposit on the web and there is no scratching or scuffing of the substrate.
Each web cleaner system is custom designed and manufactured to meet your specific cleaning requirements.
Web Cleaner WSI Non-Contact Micro Cleaner requires minimum maintenance, filter changes, and provides high levels of durability and reliability.
Web Cleaner Benefits
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Non Contact
- Ultra Sonic Assisted
- High Efficiency
- Improves Production speed
- Removes 20 Micro Particles
- Avaialble up to 240" for Webs and Sheets
Unlike conventional vacuum or air knife cleaners, the Micro Cleaner’s unique ultrasonic nozzle penetrates the boundary layer formed on a moving web. Small particles are trapped in this boundary layer and remain untouched by conventional web cleaners. The high frequency, high energy air pulses, 100 kHz and higher, generated by this system, break up the boundary layer and expose the trapped particles to the high level vacuum for easy removal.
Conventional systems that are mounted on opposite sides of the web may induce web flutter and damage the substrate. The typical solution is to increase the cleaner to substrate gap, thus compromising cleaning efficiency. Mounting the Micro Cleaner head above a back-up roll maintains a consistent substrate gap. This eliminates the possibility of web flutter and insures repeatable cleaning results.
Cleaning efficiency comparison
Typical cleaning results
Breaking the Boundary Layer
When air moves across a surface, such as a high-speed web, a boundary layer is formed. This layer can build to substantial thickness, trapping and carrying particles with a diameter less than the boundary layer thickness. A web moving at 1500 ft/min for example, can form a layer larger than 1 inch, allowing even large particles to remain trapped.
Typical vacuum systems are not able to break up or penetrate this layer and thus cannot remove the smaller particles.
Conventional air knives can reduce the thickness of the boundary layer by directing high velocity air along the substrate. This method, however, has severe limitations, since in the process of overpowering the web’s boundary layer, the air knife creates a new thinner boundary layer, perhaps 50 to 100 microns thick. Larger particles can be removed, but small particles are still trapped in this newly created boundary layer.
The only effective solution to removing the trapped fine particles is to utilize an agitating method to disrupt or penetrate the boundary layer. The ultrasonic nozzle of the Micro Cleaner superimposes high frequency pulses over a high pressure, high velocity flow to impart very high energy levels to the substrate. These pulses knock the trapped particles out of the boundary layer so they can be removed by the vacuum without any damage to the substrate.
Pressure side air is filtered through a 0.3 micron HEPA filter to prevent contamination of the substrate. 
25 Micron filter with indicator lights for normal operation, or filter change.
Static elimination is critical to effective cleaning. Shown is the Avalanche 100 Ionization system.