It is charged when the fabric is given friction.
electric charge amount＝［generated amount］－ ［leakage rate］
Electric charge amount is depending on physical and chemical characteristics of substance and surroundings.
Anti-Static agents reduce the amount of charge in the following method.
[Giving moisture absorbency]
・Imparts hydrophilicity to fabric surface
Water has good electric conductivity
[Giving ionic nature]
・Improves electric conductivity
・Neutralizing of electric charge
Polyester：charge (－) → give it cationic (＋)
Nylon ：charge (＋) → give it anionic (－)
[Lowering friction resistance]
・Imparts slicking component
Controls electric static by friction