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Abstract

This paper investigates corona discharge on meltblown nonwoven polypropylene. Samples are charged under a high electric field for two to ten minutes, then put on an air conditioner to evaluate their filtration efficiency of indoor air. Modem people stay indoors for around 80% of each day, and the demand for a better quality of life has greatly increased the importance of indoor air quality. The endurance of an electret filter is related to its electrostatic decay time. A needle electrode is used to conduct an experiment with various discharging times. Measurement data indicate that nonwoven polypropylene electrets charged for 10 minutes are more efficiently filtered than those charged for two minutes.

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Particle Filtration with an Electret of Nonwoven Polypropylene Fabric

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