The Ability of Common Fabrics to Filter Ultrafine Particles

This data is the result of a study carried out in March and April of 2020 in response to the novel coronavirus pandemic. The purpose of the study was to evaluate the suitability of common fabrics for homemade face masks. This was conducted in light of the severe PPE (Personal Protective Equipment) shortage caused by the pandemic. This data was collected using a setup described by Irwin M. Hutton in his 2016 book Handbook of Nonwoven Filter Media, 2nd edition. This testing method and filtration calculation study is consistent with those used in similar studies on particle filtration. For this study, a 1" diameter tubing apparatus was adapted to give access to two P-Trak Ultrafine Particle Counters. Air was pulled through the apparatus at a rate of approximately 16.5 meters per second. Upstream concentrations represent number of ultrafine particles present in the air before it passes through the filter medium. Downstream concentrations represent number of ultrafine particles present after the air has passed through the filter medium. Readings were taken simultaneous 1.5” before and after the filter medium holder. Each data point represents a 10-second average of ultrafine particle concentrations present in passing air. Filtration efficiency was calculated according to Irwin M. Hutten’s formula. For further information on the setup and filtration efficiency (FE) calculations, refer to Chapter 3 of Handbook of Nonwoven Filter Media, 2nd edition, written by Irwin M. Hutton and published by Buttterworth and Heinemann in 2016: https://doi.org/10.1016/B978-0-08-098301-1.00003-4

本数据集源自2020年3月至4月为应对新型冠状病毒大流行开展的一项研究。该研究旨在评估普通面料用于自制口罩的适配性，其开展背景为疫情引发的严重个人防护装备（Personal Protective Equipment，PPE）短缺问题。
本次数据采集采用欧文·M·赫顿（Irwin M. Hutton）在其2016年出版的《非织造过滤介质手册（第2版）》中描述的实验装置。该测试方法与过滤计算流程与同类颗粒过滤相关研究保持一致。
本研究对直径1英寸的管路装置进行改装，使其可接入两台P-Trak超细粒子计数器。实验中气流以约16.5米每秒的速率流经该装置。上游浓度指气流穿过过滤介质前空气中所含超细粒子的数量，下游浓度则指气流穿过过滤介质后空气中的超细粒子数量。实验同时在过滤介质支架前后1.5英寸处同步采集读数。
每个数据点均为流经气流中超细粒子浓度的10秒平均值。过滤效率（Filtration Efficiency，FE）依据欧文·M·赫顿提出的公式计算得出。
如需了解实验装置搭建及过滤效率计算的更多细节，请参阅欧文·M·赫顿所著、巴特沃斯海涅曼（Butterworth and Heinemann）于2016年出版的《非织造过滤介质手册（第2版）》第三章，相关DOI链接为：https://doi.org/10.1016/B978-0-08-098301-1.00003-4