Antistatic guidelines
The electrostatic charge index is expressed as the surface resistivity (the electrical resistance of the test piece surface).
The smaller this electrical resistance value, the easier it is for electricity to flow, which means it has an antistatic effect.
The target level of surface resistivity varies depending on the purpose of antistatic treatment, so it is necessary to adjust the type of antistatic agent and the amount added according to the purpose. The charging phenomenon, antistatic purpose, and application examples for each surface resistivity value are summarized in the table below.
| Surface resistivity (Ω/sq.) | Charging Phenomenon | Purpose of antistatic | Application example |
|---|---|---|---|
| ＞1013 | Static electricity builds up | (insulation) | (Insulating materials) |
| 1012 ~ 1013 | Charged but slowly decays | Prevents dust and dirt from sticking | Vacuum cleaner dust box |
| 1010 ~ 1012 | Charged but quickly decays | Explosion-proof | Explosion-proof helmet |
| < 1010 | No static electricity | Protection of electronic components and circuits | Electronic component tray |
