The 3 Types of Static Generation

Static electricity is something that we talk about often here at EXAIR, particularly during the colder winter months. When an atom gains or loses an electron from its outer shell, it becomes electrically imbalanced. A material’s propensity to either gain or lose an electron is “ranked” on a list known as the Triboelectric Series. So how does static actually generate, or what causes these atoms to either gain or lose an electron? There are three types of static generation: contact, detachment, and frictional static build up.

Contact static build up is one of the simplest methods of static generation. In this type of static generation, a charge is generated simply from two objects contacting one another and separating. This often results in an instantaneous static charge as the electrons are transferred from one object to another in accordance with the Triboelectric Series.

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As a layer of material is peeled off, electrons are transferred from one sheet to another.

The second type of static generation is known as detachment static buildup. The principle behind the type of static electricity is the same as contact static buildup, but the materials are already in contact with one another and the charge is generated as the surfaces are separated. During the separation, not all of the electrons are able to get back to their original molecule. The amount of static generated in detachment static buildup is generally far greater than contact static buildup due to the large surface area.

BOSE 2

The last type of static generation is frictional static buildup. When two objects have friction between one another, electrons in the outer valences of the molecules can easily pass from one atom to another. If the force pressing the objects together increases, even more molecules come into contact with each other and increase the charge that is generated. Just as detachment static buildup, frictional static buildup generally produces higher charges than contact static buildup.

Gen4 Static
Gen4 Static Eliminators

Regardless of the type of static generation occurring in your process, EXAIR has a Static Eliminator that is suitable for neutralizing that charge and mitigating any issues that you’re having as a result. With a team of Application Engineers standing by to help and our unconditional 30 day guarantee, there’s no reason to not give us a call and try one out!

Tyler Daniel
Application Engineer
E-mail: TylerDaniel@EXAIR.com
Twitter: @EXAIR_TD

Eliminating Static in Industrial Processes

Ever wonder what causes that annoying shock you get when you go to grab a plastic or metal piece. That is a phenomenon caused by static electricity. This static is an electrical surface charge that is generated and when two surfaces come in contact with each other and generate an electrical charge from friction, separation, or simple contact. If the material in question is not grounded properly the electrical charge will continue to accumulate until it comes in contact with a proper ground or the path of least resistance to discharge the built up static and return to a neutral state.

Static

Static is generated on the atomic level from the exchange of valance electrons on each surface. The energy produced from the friction, separation or contact cause those valance electrons to enter an excited state; when in this excited state they begin to jump back and forth from atom to atom. When this happens, the atoms begin to accumulate either a positive charge if the atom lost electrons or a negative charge if the atom gained electrons. As the charge accumulates on the surface were the friction occurs if a ground source (i.e. piece of metal or a person) comes in close proximity to the charged surface an arc is generated between the two surfaces returning the originally charged surface to a neutral state.

Static can be harmful to both employees and product in an industrial environment. If a static arc is generated in the presence of either flammable, combustible, or explosive liquids or gasses the arc can cause an ignition of the material. Static can also cause the charged object to stick or cling to various surfaces causing clogs in pipes and issues when trying to separate the material one at a time. This phenomenon is called static cling.

Even though static is very easy to generate it can just as easily be dissipated; EXAIR’s line of static eliminating devices use a high voltage emitter point to generate a small zone of ions which consists of both positive and negative charges to dissipate the static build up on the surface. Also, when the various emitter points and ion bars are coupled with our compressed air products, the air carries the ions much farther and can dissipate static up to 20’ away. The best part is that about the line of our line of static eliminators is that they are shockless; this means that if somebody bumps into it, they won’t get shocked.

Gen 4 Super Ion Air Knife Eliminating Static with Ions

For more information on EXAIR’s Static Eliminators and any of EXAIR‘s Intelligent Compressed Air® Product lines, feel free to contact EXAIR and myself or any of our Application Engineers can help you determine the best solution.

Cody Biehle
Application Engineer
EXAIR Corporation
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Super Ion Air Wipes – Eliminate Static on Wire, Cable, Extrusions

Gen4 Super Ion Air Wipe

As the colder dryer months are upon us, static electricity will be more frequent and will become a real nuisance.  Machines will start jamming, alignments will be difficult, dirt will collect to surfaces, and hazardous sparks can shock personnel.  EXAIR manufactures a line of Gen4 Static Eliminators to remove this nuisance.

EXAIR manufactures eight different product lines in two different styles within our Gen4 Static Eliminators.  In this blog, I will be covering the Super Ion Air Wipe.  This product blows ionized air in a 360-degree pattern.  They are engineered to remove static and debris from the outside of hoses, plastic pipe, extrusions, and coated wires.  With a split design, the Gen4 Super Ion Air Wipe can easily mount around the product without having to re-thread.  EXAIR stocks two different sizes with a 2” (51mm) and 4” (102mm) inside diameter. The Super Ion Air Wipes give a fast static-decay, a shockless and non-radioactive design, variable flow and force, low air consumption and no moving parts.

8462 Super Ion Air Wipe Kit

The Gen4 Super Ion Air Wipe can be purchased as a kit which will include the power supply (required for ionization), a filter separator (to clean contamination from the compressed air), and a pressure regulator (to control the blowing force).  The filter and regulator are properly sized to avoid any air flow restrictions or loss of performance which can occur when using components which are not suited for the application.

Static

Generally speaking, static is generated from non-conductive surfaces being “rubbed”.  This could be from going over rollers on a conveyor, stacking product onto each other, sheet feeding, and even peeling away a backing material.  When non-conductive surfaces, or insulators, are moved or separated, electrons are “stripped” and redistribute on to different areas of the surface.  Static charges are typically measured in kilovolts (kV), or 1,000 volts, and they can be either positive or negative.  The higher the charge, the stronger the static force.  In reference, at 10 kilovolts, a spark can jump one inch (25 mm) from the surface.   EXAIR offers a Digital Static Meter, model 7905, to measure the amount of static voltage on a surface.  It is a great tool for finding problem areas in your process as well as determining the effectiveness of the treatment.

All EXAIR Gen4 Static Eliminators use one of two Power Supplies – your choice of the 2-port Model 7960, or the 4-port Model 7961.

These ionizers are powered by a 5,000V AC power supply.  The alternating current, AC, will create both negative ions and positive ions.  So, no matter the polarity of charge on the surface, the Gen4 Static Eliminators will be able to remove it.  The power supplies come in either a 2 port or 4 port design so you can power multiple Gen4 Static Eliminators with one power supply.  The input power is selectable from either 115VAC or 230VAC in both 50/60 Hz.   Two armored and electromagnetic shielded cables connect the Super Ion Air Wipe to the power supply. This will help to protect the cable from abrasions, cuts and splits which can be common in rugged industrial areas.

Static can be a real nuisance with shocking operators, “sticking” debris, and jamming processes.  If you run into these issues in your application, no matter the shape, EXAIR has a Gen4 Static Eliminator for you.  Even if you have cylindrical objects like tubes, pipes, hoses and extrusions; EXAIR can provide the Gen4 Super Ion Air Wipes in stock.  For more information, you can contact one of our Application Engineers at EXAIR.

John Ball
Application Engineer
Email: johnball@exair.com
Twitter: @EXAIR_jb

Static Electricity: What Is It And The Products To Solve Industrial Process Problems

The lower relative humidity associated with the cold, dry air of winter results in a significant increase in customers  with problems related to static. Luckily, EXAIR has a wide-range of Static Eliminators that are designed specifically to address static issues in a wide variety of industries. So, what exactly is static and how is it generated? Let’s take a quick trip down memory lane to elementary school science class….

An atom consists of three basic particles: protons, neutrons, and electrons. The protons (positively charged) and neutrons (neutral charge) form the nucleus. Outside of the nucleus, electrons (negatively charged) are quickly zipping around in orbits at specific distances from the nucleus. These electrons are bound to the nucleus due to electromagnetic force. Opposite charges attract. Since the protons in the nucleus carry a positive charge this acts on the negative charge of the electrons and keeps them in orbit. The closer the electron to the nucleus, the stronger the bond and the more energy required to break that electron from its original orbit.

When an atom gains or loses an electron, it affects the balance that occurs within an atom. If an atom gains an electron, it now has more electrons than protons. This results in a negatively charged atom. The opposite can be said if an atom loses an electron, it now carries a positive charge. This charge imbalance is where static electricity comes from. Both positive and negative charges will remain static until contacted by or in close proximity to a conductive or grounded surface. Materials such as paper, plastic, or textiles will normally contain an equal number of both positive and negative ions. When subjected to friction, this balance can be disturbed if the atoms gain or lose an electron.

The static charge will then exert a force on nearby charged objects or grounded conductors (including personnel). These issues can also manifest in the form of dust clinging to product, product clinging to itself, rollers, machine beds or frames, materials jamming, and sheet feeding problems.

To eliminate these charges, EXAIR’s Static Eliminators produce an equal amount of both positive and negatively charged ions. This allows us to neutralize either charge quickly and effectively.

For applications that allow you to install close (generally within 2”) to the surface of the material, we offer our Ionizing Bar in lengths ranging from 3”-108”. If a wide area of coverage is necessary, but you can’t get close to it, the same Ionizing Bar is installed on the Super Ion Air Knife to help deliver those ions over a greater distance.

gen4 super ion air knife
Gen4 SIAK

The Ionizing Point is another product that can be used without the need for compressed air. A compact, single point ionizer, this product is ideal for winding, rewinding or slitting operations. It can also be mounted through a duct to neutralize static charges due to moving air or materials.

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Gen4 Ionizing Point

The Ion Air Gun combines incredibly fast static decay rates with low compressed air consumption. With a 10’ flexible armored cable and ergonomic handle, the Ion Air Gun is best for applications where an operator will perform the blowoff process.

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If the airflow pattern from the Ion Air Gun is conducive to your application, but you’d prefer to automate the blowoff or maintain a continuous usage, both the Ion Air Jet and the Stay Set Ion Air Jet provide an identical airflow pattern. The Stay Set Ion Air Jet comes with a magnetic base and Stay Set Hose, allowing you to precisely position the static eliminating ions in your process.

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The Ion Air Cannon delivers a quit, efficient, and concentrated flow of ionized air. It is ideal for hard to reach spaces or confined areas that necessitate a solution to static problems. Designed with a sturdy stand, the pre-drilled holes can be wall, bench, or machine mounted. It incorporates a swivel adjustment for directing the airflow.

Our Gen4 Static Eliminators have all undergone independent laboratory tests to certify that they meet the rigorous safety, health, and environmental standards of the USA, European Union and Canada that are required to attain the CE and UL marks. If there’s a process in your facility that could benefit from a solution to static problems, please give us a call. Any of our Application Engineers will be happy to help select the best option for your process.

Tyler Daniel
Application Engineer
E-mail: TylerDaniel@EXAIR.com
Twitter: @EXAIR_TD

The Impact of Cold Temperatures and Lower Humidity on Static Electricity

This time of the year it is not uncommon to feel a slight shock after walking across a carpeted surface and touching a door knob. This little “jolt” is a result of fast-moving electrons leaping from your body to the door knob, or vice versa. As your feet shuffle across the surface of a rug or carpet, your body will either gain or lose electrons. Touching a conductive surface then causes these electrons to leap from one place to another. This is known as static electricity.

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If you notice, this happens to occur much more often during colder winter months (if you’re one of those fortunate people to live outside of this sensation we call “cold” please don’t rub it in!). The reason that you experience static shocks more frequently during winter is due to the relative humidity. At colder temperatures, air does not hold as much moisture as it does when it’s warm and moisture helps to conduct electrical charges. Even though you’re heating your house to a similar temperature, the air that is being drawn into your home and heated is still the dry cold air containing less moisture.

The amount of moisture in the air is expressed as relative humidity. This value is given as a percentage of water vapor in the air, compared to how much it could hold at that temperature. In conditions of lower relative humidity, static charges build up much easier. When the relative humidity is high, there’s a higher concentration of water molecules present in the air. These water molecules “coat” the surface of the material, allowing electrons to move more freely and form a layer over the material. This layer of water molecules acts like a lubricant, reducing the forces that cause static to generate. This is why static is much more noticeable during the winter months.

Gen4 Static
Gen4 Static Eliminators

There are many applications that static only appears when the seasonal climate changes. Issues can manifest in the form of nuisance shocks to operators, materials jamming, tearing or curling, product sticking to itself and to rollers, dust clinging to product, and many more. If static is causing problems in your processes, we have a wide variety of Static Eliminators available from stock. Don’t just deal with the problems until humid conditions return, get a permanent solution in place that’ll neutralize the static and eliminate a troublesome application. Contact an EXAIR Application Engineer today and we’ll help to diagnose the root cause of the problem and recommend the best solution.

Tyler Daniel
Application Engineer
E-mail: TylerDaniel@EXAIR.com
Twitter: @EXAIR_TD

 

Photo courtesy of Ken Bosma via Flickr Creative Commons License

Video Blog: How to Replace Gen4 Power Supply Fuse

With winter in full swing in North America, humidity is dropping and causing an increase in static charges. EXAIR’s line of Static Eliminating products are a necessary tool for dealing with troublesome static electricity in a variety of different industrial processes.

EXAIR’s Gen4 Static Eliminators utilize a new Power Supply to produce static eliminating ions. A new feature of the redesigned Power Supply was the ability to replace a couple of different parts rather than having to purchase an entirely new unit. In a previous video, we showed you how to replace the rocker switch if necessary. In this video, I’d like to show where the fuse is located on the new Power Supply and how to replace it if blown.

If you have any questions about your Gen4 Static Eliminators, or would like to discuss a potential application, give us a call today. Our Application Engineers are standing by waiting to help you determine the most suitable product for your application.

Tyler Daniel
Application Engineer
E-mail: TylerDaniel@EXAIR.com
Twitter: @EXAIR_TD

 

It’s Starting to Look a Lot Like Static Season

Well the dog days of summer have come to an end, and the cold dry air of winter is on the horizon! There’s one other thing that comes along with the cold dry air of winter, and that’s SANTA! (Sorry that was the child in me).

Actually, it’s STATIC! During the warmer months the moisture in the air does a good job at eliminating a good amount of excess static charge. But as that cold dry air comes into play you need another way to rid your production of static or things will start to go wrong.

Foam Static
Static holding foam bead material to a surface.

In many painting or finishing applications dust and debris from the ambient environment can settle on the part prior to painting or coating. Just blowing them off with a standard air gun won’t remove all of the particles if they’re statically charged. The static must be neutralized in order to remove it or it’ll cause imperfections in the paint or coating. This often results in a high amount of rejected parts that must be scrapped out.

Other processes that benefit from static removal include printing, slitting, molding, sheeting/trimming, shrink wrapping and packaging.

Static Eliminators
Static Eliminators

Break out your fall / winter gear and enjoy the cooler weather and activities that accompany the coming of Fall, but don’t let static wreak havoc in your processes. EXAIR has a wide range of solutions available that are designed to solve these problems. Give an Application Engineer a call and we’ll be happy to help recommend the best solution.

Jordan Shouse
Application Engineer

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