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Static Eliminator

Static Eliminator

Cost-Effective Solutions for Trim Removal & Material Waste Handling
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Static Eliminator

In the course of moving cut or chopped scrap trim through ducting using vacuum forced air, the scrap (or recycled) trim can pick up static electric charges. This is more common with light films (cast, blown, etc.) than with heavy paper, laminates or non-wovens.

Scrap moves through ducting at speeds that exceed 5000 ft/min (slightly less than 60 miles/hr). Even in areas of the world where humidity is high, air inside the ducting (and any trim that is conveyed with the air) will dry through long duct runs to an air separator then a compactor, baler or recycling unit.

The friction created by the combined movement of air and trim in ducting generates electrostatic charges that are picked up by the trim. Voltages can be as high as 20 kV.

Duct clogging caused by electrostatically charged trim may occur if the trim is not conveyed with adequate air volume (thus velocity). These highly charged particles exhibit a tendency to cling and attach to other highly charged scrap pieces and to the walls/elbows of the ducting. These highly charged scrap pieces will continue to collect and build up until they clog ducting or "bridge" openings, such as a cyclone exit. At that point, the suction provided by the material handling fan is negated. Or, if the air separator is bridged, a back-pressure formed from pushing air and trim against a rigid clog will cause the system to stop delivering scrap material.

The in-line Static Eliminator produces an alternating series of positive and negative ions through electrodes mounted in brushes mounted inside a polyvinyl chloride (pvc) tube. As the ions come in contact with the charged scrap material, the scrap is neutralized. This eases the flow of material to its end destination. The Static Eliminator should be placed in ducting prior to entry to an air separator or prior to entry to a fan.

CTM Systems, Inc. has designed, built and tested (at several "beta" sites) its in-line Static Eliminator to handle these static problems. The test results have been excellent. The Static Eliminator is offered in 4, 5, 6, 8, 10 and 12-inch diameter tubes. Contact CTM Systems when static problems arise. We have the best possible solution to your static problems.

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