Active vs. Passive Static Eliminator
Static electricity is an electric charge at rest. In the dry and windy days, people often come across this phenomenon in their daily life. Static eliminator plays a very important role in this situation. In the following, we will introduce the differences between active static eliminator and passive static eliminator.
Active Static Eliminator:
Active static eliminator (static rod or ion bar) is an electric operation, which can be an AC or DC system. The DC system is designed to work farther away from the target, but usually more expensive than the AC system. On the other hand, the AC system typically operates around the vicinity of the static product to eliminate static electricity. The active system is essentially ionization of oxygen molecules that are attracted to the charged surface in the surrounding air, thereby neutralizing the air "see" (exposed to) charge.
The active system works alternately with a negative ion and a positive ion. Regardless of the electric charge of the surface, the opposite charge ions will take it away. The active system can be removed, if not all static charges are from one electrostatic partial surface. There is a need to have a sufficient amount of ions, and the level of charge is required, and some resident time is in charge. The faster the target move, the shorter the residence time of eliminating electrostatic ion eliminating electrostatic charge.
Passive Static Eliminator:
Examples of some passive static eliminates include: copper wire, nylon brush, sharp edge metal strip, anti-static soft rope and anti-static spray. These passive devices typically only reduce charge in addition to anti-static spray. In some cases, static eliminator may be sufficient to reduce static charge, but these passive devices have limitations.
For rope and metal foil, there may be potential hazards when they break, and it is also possible to fell on the material being processed. If the components with static electricity cannot withstand liquid due to any reason, an antistatic spray cannot be used. The brush is limited to slow movement and lower electrostatic charges - the most commonly used printers, fax machines, and other places with only static electricity to avoid sticky paper.
Using passive electrostatic control can help prevent some machines from interfere with and resolve employees discomfort, but because it does not completely eliminate static electricity (except anti-electrostatic spray), it is usually not enough to solve the dirt problems caused by static electricity. The disadvantage of the spray is that it is an endless consumable, and the cost is increasing over time.