Chen C C, Ruuskanen J, Pilacinski W, Willeke K
Department of Environmental Health, University of Cincinnati, OH 45267-0056.
Am Ind Hyg Assoc J. 1990 Dec;51(12):632-9. doi: 10.1080/15298669091370275.
The filtering facepiece, also referred to as a disposable respirator, is an extensively used type of respirator without an officially accepted fit testing method. This study describes an aerosol generator and a sampling train, which have been developed for investigating the aerosol penetration characteristics through the filter element and the face seal. Electrostatic attraction and impaction are the two primary filtration mechanisms for micrometer- and supermicrometer-sized aerosols, respectively. Filtration and flow dynamics were found to affect aerosol penetration in distinct ways that allow for the differentiation of the face seal leakage from the filter penetration. The slope of the aerosol size-dependent penetration curve potentially may differentiate the face seal leakage from filter penetration.
过滤面罩，也被称为一次性呼吸器，是一种广泛使用的呼吸器类型，但目前尚无官方认可的适合性测试方法。本研究描述了一种为研究气溶胶透过滤芯和面部密封件的渗透特性而开发的气溶胶发生器和采样系统。静电吸引和惯性碰撞分别是微米级和超微米级气溶胶的两种主要过滤机制。研究发现，过滤和流动动力学以不同方式影响气溶胶渗透，从而能够区分面部密封件泄漏与滤芯穿透。气溶胶尺寸依赖性渗透曲线的斜率有可能区分面部密封件泄漏与滤芯穿透。
