極細繊維ポリプロピレン不織布を用いたエレクトレットフィルターの特性

抄録

Electrically, polarized nonwoven fabrics of ultrafine polypropylene fibers were examined as air filters in the effects of their structures and surface charge densities on the filtration characteristics. The dependency of particle penetration on fabric structure was investigated based on the fan model theory, which clarified the structural distinction between the nonwoven filters and two kind of glass filters used for clean room elements. The electrostatic and mechanical collection efficiencies were separately estimated. The stability in filtration property against heat, moisture, air flow rate, and dust loading was tested, by which the electret filter was proved to be applicable as clean room filter.