Whether you manufacture electronic consumer goods or explosive powders for the military, your customers have one thing in common &#; they expect your products to arrive undamaged. That reality means you must safeguard your goods against threats like moisture and corrosion. With sensitive electronics, it also means protecting them from electrostatic discharge (ESD).
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ESD can cause failure of electronics and extensive damage to medical devices, paper, plastics and more. In industrial applications, ESD can slow your production rate and quality, create safety concerns and introduce contaminants to your products. Protections from ESD are essential to deliver quality products to your customers.
Electrostatic discharge is the emission of static electricity between two objects with differing charges and electron counts when they make contact. Common examples include the charge you experience when taking laundry from the dryer or walking across a carpeted floor and touching a doorknob. This phenomenon happens in nature during storms &#; lightning is ESD.
While small shocks and laundry-related ESD are rarely concerning, this discharge can harm electronic components and devices. Measurable static currents carry heat and can easily damage sensitive circuitry. More extreme voltages can also produce sparks, which could lead to a fire.
The charge transfer during ESD causes extremely high temperatures. When ESD is released into electronics, the heat itself can melt and vaporize the components, leading to failure. Electronics can experience two types of ESD damage at many points throughout their life cycle:
Besides electrical damage, ESD can cause other issues like coal dust, fuel vapor and explosion ignition in gas.
Both high- and low-voltage ESD can damage electronic devices. Even small amounts of voltage can cause damage, with some parts more vulnerable than others. For example, it takes less than 10 volts of charge to harm many of the more sophisticated circuits used today.
ESD comes from a buildup of static electricity or electrostatic charge, not just electricity in general. This buildup happens when two different conductors rub together. One conductor assumes the positive charge, and the other becomes negatively charged. As a result, the former now has an electrostatic buildup. When it contacts another conductor, a static charge is transferred, and it releases that buildup as ESD. A dielectric failure or electrical short can also cause ESD.
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In an industrial environment, people and equipment can cause ESD. Employees can generate static charges during work when walking, item handling and assembly, and other types of movement. Moving equipment like conveyors, assembly machines and trucks can also generate a static charge. ESD from people or equipment can be up to a few thousand volts.
Factors influencing ESD include environmental humidity and the material&#;s ability to store a charge. The higher the humidity in the air, the less static electricity can build since moisture naturally helps dissipate charges. However, electrostatic current can still build in high-humidity environments. A material&#;s chemistry also affects static electric discharge. Some compositions can retain higher positive charges and generate increased voltages.
Preventing ESD starts with understanding the environment where the device is manufactured, used and handled. Then, you can take steps to reduce or eliminate the chance ESD will occur.
You can safeguard your products and protect against ESD events with solutions like anti-static and static-shielding bags. Electrostatic discharge packaging works by creating a Faraday cage effect, a scientific phenomenon that shields items inside the bag by dispersing the electromagnetic radiation on the outside. The positive and negative particles from the materials repel and move to opposite sides of the conductor. The redistributed charges create an opposing electrical field, shielding the interior from exterior static charges.
The protection from the Faraday cage makes anti-static bags a common method to protect electronic devices from electrostatic charges. The conductive material and structural design of the package are key factors in Faraday cage protection.
Edco has been a leading source of anti-static and static-shielding bags since . We use our decades of expertise to provide high-quality electrostatic packaging solutions to customers throughout Canada and the United States. Contact us for product guidance for your application, or request a quote today.
One upside of a ruined negative is that it can make a useful post on Photrio. I couldn't turn up another thread on this topic, though I'm sure there must be examples buried in some thread with a title like "What's this stuff on my negs?"This is about the clearest example I've seen of static discharge on the negative, occurring most likely in the camera. I'd have thought I was immune from this problem in our relatively humid subtropical climate, particularly when shooting right on the beach, but we've been having some unusually cool weather, and maybe it's reduced the humidity in the air.It's between the last two frames, so it's unlikely to have happened before the film was loaded or to be the result of triboluminescence from the tape attaching the film to the backing paper, which is at the other end of the roll.The camera is a medium format Noblex 150 that shoots a 2.25x5" panoramic image, so presumably the static is from the rotating drum, which is a known issue with these cameras, just not an problem I've experienced before. The film is Adox CHS 100, developed in ABC pyro 1+1+1+12.And, yeah, those people out there on the water are doing yoga on paddleboards.
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