可視化解析技術によるエレクトレット不織布の熱刺激電流分離とフィルタ性能の新しい評価

Abstract

This study measured the thermally stimulated current (TSC) of an electret air filter. The TSC method can examine the charged state of not only the film insulation material but also the fiber structure. The experimental air filters used in this study consisted of eight types of polypropylene non-woven fabrics with different structures. The observed TSC spectrum exhibited a complex waveform that contributed toward multiplex traps. However, using the trap state visualization analysis technique developed by the author, the TSC spectrum could be precisely separated. As a result, it was found that deep activation energy of the trap, which had excellent air filter performance, had deep activation energy and that the heat resistance of the air filter can be improved by reducing the escape frequency factor due to additives.