General knowledge of antistatic properties

2022-09-14 19:30:50 admin

General knowledge of antistatic properties

1. What is ESD?


ESD stands for ElectroStatic Discharge in English, which means "electrostatic discharge". ESD was developed in the middle of this century to study the generation and decay of static electricity, electrostatic discharge models, electrostatic discharge effects such as current thermal (spark) effects (such as static-induced ignition and explosions) and electromagnetic effects (such as electromagnetic interference) . Subject. In recent years, with the rapid development of science and technology, the wide application of microelectronics technology and the increasingly complex electromagnetic environment, the electromagnetic field effects of electrostatic discharge such as electromagnetic interference (EMI) and electromagnetic fields have received more and more attention. Compatibility (EMC).


2. The limit of electrostatic ignition?


The ignition potential of an electrostatic nonconductor is about 30KV. According to the national standard "General Guidelines for Preventing Electrostatic Accidents", Article 5.2.3 points out that a static non-conductor potential below 15KV will not ignite a combustible gas with a minimum ignition energy greater than 0.2mJ. However, in some cases the ignition limit is still small, some standards specify about 5KV. The charged potential to protect the human body from electrostatic non-conductor electric shock is about 10KV or lower.


3. Static performance parameters?


The amount of charge of an object is usually represented by the amount of electrostatic charge and the electrostatic voltage. The antistatic properties of materials such as plastics, rubber, antistatic floors (surfaces), carpets, etc. are usually composed of electrical resistance, resistivity, volume resistivity, surface resistivity, and charge. (or voltage) half-life, electrostatic capacitance, dielectric constant, etc. But the most commonly used and most reliable are resistance and resistivity.


4. How does static electricity affect the human body?


If the static electricity of the human body exceeds 2 to 3kV, a static shock will occur when a person touches a grounded metal. If the electrostatic voltage is high, it will have a certain impact on human psychology and physiology.