Particle Release from Respirators, Part II: Determination of the Effect of Tension Applied in Simulation of Removal
Particle Release from Respirators, Part II: Determination of the Effect of Tension Applied in Simulation of Removal
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DOI：
10.1080/15459624.2011.535710
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发表时间：
2011-01-01
影响因子：
2
通讯作者：
Kennedy, Nola J.
中科院分区：
文献类型：
--
作者：
Birkner, Jeffrey S.;Kovalchik, Stephanie;Kennedy, Nola J.
本研究评估了被1 μ m颗粒污染的一次性过滤式口罩（以下简称口罩）由于施加在口罩上的侧向张力而释放颗粒的可能性。横向张力的设计是为了模拟从用户头上摘下受污染的口罩。四个品牌的过滤面罩装载了大约2000万个1.0 μ m的聚苯乙烯乳胶（PSL）微球。然后将呼吸器放置在测试室中，并承受17.8-26.7 N（4-6磅）的侧向张力1至2秒。研究结果表明，面罩类型和加载条件都不影响颗粒释放。这支持了我们的假设，即当过滤式口罩从头上适当取下时，它们不会释放大量颗粒。
This study evaluated the potential for disposable filtering facepiece respirators (hereafter termed masks) contaminated with 1-mu m particles to release particles as a result of lateral tension applied to the mask. The lateral tension was designed to simulate the removal of a contaminated mask from a user's head. Four brands of filtering facepieces were loaded with approximately 20 million 1.0-mu m polystyrene latex (PSL) microspheres. The respirators were then placed in a test chamber and subjected to lateral tension between 17.8-26.7 N (4-6 lbs) for 1 to 2 sec. The findings suggest that neither mask type nor loading condition affects particle release. This supports our hypothesis that when filtering facepiece respirators are properly removed from the head they will not release a significant number of particles.