The relationship between humidity and static is something we’re very familiar with at EXAIR. As temperatures drop and humidity decreases, the reduction in moisture content within the air translates to an increase in static . This is because higher moisture content in the air creates a surface layer of moisture that dissipates accumulated static charges. When this surface layer disappears, static forms quickly and easily.
Fortunately, we have a full line of static eliminating equipment suitable for use in removing static related process disturbances. For example, the photo above shows a plastic stretch wrapping machine at its dispensing point. As the plastic is pulled from the roll static builds up quickly and this customer needed an easy, reliable solution to remove the static. Ideally, they wanted something that would not require compressed air, but could still mount closely to the machine and remove the static charge.
The solution for this application was a series of two 24” Ion Bars mounted on each side of the film. As the plastic is unrolled it passes through the opening created by the Ion Bars, eliminating the static charge. The machine required no significant downtime to install this solution, and nothing within the machine setup had to be modified.
This type of setup was ideal because it treated the static at the proper point within the process, used no compressed air (as requested by the customer), and it provided a simple installation to solve the problem.
Plastic sheets and films that are being separated after full contact can generate significant static charge. If you have a film/sheet application, or another static related need, contact an EXAIR Application Engineer. We’d love to help you find a solution.