Static Dissipation Mechanism in Carpets Containing Conductive Fibers

The mechanism of static charge dissipation in carpets containing electrically conductive fibers is investigated. Incorporating conductive fibers in a carpet, even as isolated conductors, results in greatly reduced static charge accumulation on people as they walk across the carpet. Results of this work show that static charge dissipation depends on free ion formation around the tips of conductive fibers by corona discharge. We propose that the amount of charge accumulated by a person walking on a carpet is an equilibrium between the rate of charge formation and rate of charge neutralization through recombination with free ions of opposite sign produced by corona discharge around conductive fibers. We describe a method of measuring the corona current emanating from carpet tufts containing conductive fibers as a function of voltage. The amount of charge built up on a person walking on a carpet is inversely related to the corona current.

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