Respirators have become popular personal protective equipment since the COVID-19 pandemic. The key material in respirators is the melt-blown polypropylene electret fabric (MBPPEF). In this article, the filtering and inactivating effects of electrostatic fields in the respirator materials on Staphylococcus aureus (S. aureus) are studied. As a typical airborne microorganism, S. aureus is often employed to evaluate the antibacterial performance of air filtration equipment. The results prove that the electrostatic field in MBPPEF plays the key role in filtrating S. aureus. All MBPPEF from different charging method can have a filtering efficiency of more than 99% against S. aureus. The inactivation rate of positive corona charged sample is the highest. The charging method will affect the formation of electrostatic fields in the MBPPEF, thereby affecting their antibacterial performance.

自 COVID-19 大流行以来，呼吸器已成为流行的个人防护设备。呼吸器的关键材料是熔喷聚丙烯驻极体织物 (MBPPEF)。本文研究了口罩材料中静电场对金黄色葡萄球菌（S. aureus）的过滤和灭活作用。金黄色葡萄球菌作为一种典型的空气传播微生物，常被用来评价空气过滤设备的抗菌性能。结果证明MBPPEF中的静电场对金黄色葡萄球菌的过滤起关键作用。不同充电方式的所有MBPPEF对金黄色葡萄球菌的过滤效率都在99%以上. 正电晕带电样品的灭活率最高。充电方式会影响MBPPEF中静电场的形成，从而影响其抗菌性能。