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Prevent objects from being charged with static electricity. Even if static electricity is generated, prevent objects from being charged to the extent that problems may result. Appropriate measures need to be taken, depending on the applications. q Grounding Grounding is a fundamental countermeasure against static electric. However, grounding is sometimes not complete due to insulation from lubricating oils, and that grounding is not deep enough in the ground, therefore, it is necessary to confirm the grounding. w Humidity control Humidity is controlled by humidifiers and such. Caution: Humidifiers may not be effective for devices that obtain a high temperature. e Conductive products Caution: Conductive products cannot discharge static electricity without grounding. r Removing static electricity with ionizers, etc.
Difference in materials Conductive materials Conductive materials can discharge static electricity immediately with grounding. When surface treatments such as anodization and the like are applied, conductive materials will become insulated and grounding will be ineffective. Insulated materials Insulated materials cannot discharge static electricity even if they are grounded. To discharge static electricity, switch to using conductive materials, use humidity control or a surface active agent, or install an ionizers, etc.
Electrostatic features of conductive and insulated materials + + + + + . + . . Technical Information Countermeasures against Static Electricity Earth (Ground) Insulator Conductive materials are charged when they are placed on insulating materials without grounding. When ground cannot be connected, take the same measures that are taken for insulating materials. Conductor Neutralized by grounding ・ Conductive (Rapid electrostatic removal) ・ Charged evenly Insulator Not neutralized by grounding ・ Non-conductive (Requires time for electrostatic removal) ・ Charged unevenly. (Ion spots) In an object, some parts of the object may be positively charged and other parts may be negatively charged. Metal