Electrostatic discharge (ESD) is an abrupt electrical flow between two electrically charged objects caused by contact between the objects. Lightning exemplifies the concept of ESD. On a smaller scale, the human body is able to carry a charge and cause ESD when touching another charged object.
What is ESD Safe?
ESD Safe matting, apparel, gloves, swabs, wipes, and other supplies help ensure your environment is safe from electrostatic discharges (ESD) as much as possible. Very small discharges from static electricity can cause irreparable damage to sensitive components and electronics.
Even tables can carry a charge, causing contaminants to stick to them. Besides airborne particles attaching to surfaces, ESD from humans can damage electronics and semiconductors and can cause electrical failure.
ESD Safe products are designed to be non-conductive or to “cage” and dissipate harmful electrostatic discharges.
To prevent damage in a manufacturing or lab setting, workers wear ESD gloves.
Why do you need ESD Gloves?
ESD Gloves Do 3 Things:
- Prevent static generation
- Dissipate or Shield electrostatic charges
- Protects material from particulate contamination
ESD Gloves, no matter the material, control electrical flows around the material. Instead of a quick burst of lightning, the ESD gloves provide a way for the electric charge to dissipate slowly without damage to electronics.
Manufacturing electronics without ESD Gloves may not cause any immediate or noticeable damage. Humans only notice ESD greater than 3500 volts; however, an ESD of as little as 20 volts can cause electronic damage.
Electronics that have undergone an electrostatic discharge onto them may experience equipment failure months later. Therefore, to manufacture the highest quality products, ESD Gloves are needed for employees that interact with delicate equipment susceptible to damage from ESD and skin contaminants.
Which ESD Glove Material is best?
Nitrile is the industry standard for ESD gloves. Found in Biotech, Electronic, and Pharmaceutical manufacturing, nitrile gloves are the industry workhorse. The material is naturally anti-static, puncture resistant, chemical-resistant, and durable, making nitrile the best choice for cleanroom applications.
Workers find nitrile gloves to be more comfortable than other materials because of its “memory” that molds well to the individual’s hand.
Nitrile, unlike latex, continues to be comfortable throughout a shift. Whenever a worker needs hand protection, it is best to choose nitrile as it provides the best barrier protection against cuts and chemicals.
Without sufficient protection, chemicals can seep into the skin and cause contamination, making nitrile gloves the best choice for applications involving chemicals.
However, nitrile is not compatible with aromatic solvents and ketones commonly found in paints and adhesives. For applications involving aromatic solvents, multiple types of glove material must be provided to maximize safety.
Nylon is used frequently in electronic manufacturing and handling because of nylon’s dexterity. Nylon is not suitable for cleanroom environments “due to their very high non-volatile residue values”.
A Higher NVR values correlates to a lower surface resistance, which decreases ESD strength in high humidity environments. The material, generally coated with a polyurethane-coat, reduces static while increasing grip.
The polyurethane coating is non-porous, preventing skin contaminants and oils from seeping onto equipment. It allows workers to maximize precision and dexterity by retaining touch-sensitivity and by increasing grip without feeling “sticky”.
Workers won’t have to worry about their glove sticking to any material. The polyurethane-coat provides additional puncture resistance and prevents against the glove shedding its material in high volume applications. Additionally, nylon gloves are compatible with all touchscreen devices.
Latex is the most common material for gloves. Normal Latex gloves generate static, so for cleanroom environments latex gloves include an anti-static additive to prevent ESD.
Latex, even with the additive, is the most affordable choice for ESD gloves. However, ESD Latex gloves have the same downsides as any latex glove.
Some employees will be allergic to the material and others will find it uncomfortable for extended periods of time. Latex gloves also have a shorter shelf life than Nitrile. When working with sharp materials, Latex does not have the puncture resistance as Nitrile or Nylon.
In general, Nitrile is the most comfortable, durable, and puncture resistant material for ESD gloves.
ESD Gloves May Not Be Enough
When working with delicate electronic components susceptible to damage from human contamination, ESD gloves are necessary.
However, other static control procedures and devices will provide protection beyond a single employee’s hands. To minimize static electricity and damaging particulates, there are also ESD shoes, mats, and wrist straps to fully ground employees entering sensitive environments.
When working with sensitive equipment, ESD swabs protect from static damage. No matter your environment, ESD is controllable and damage is easy to minimize with the proper products.