Standard Specification forBarrier Face Coverings

基础信息

标准简介

Designation: F3502-21 Standard Specification forBarrier Face Coverings11. Scope1.1 This specification is primarily intended to help ensurebarrier face coverings meeting the stated requirements provide() a mcans of source control for individual wearers byreducing the number of expelled droplets and acrosols from thewearer's nose and mouth into the air; and (2) to potentiallyNothing in this standard addresses or implies a quantitative assessment ofoulward leakage and no cllaims can be rmadle about the degree to which abarricr face covering reduces camission of human-gencrated partices.1.2 This specification establishes minimum design, perfor-mance (testing)，abeling. user instruction. reporting andclassification.and conformity assessment requirements forbarrier face coverings.1.2.1 Design criteria include setting minimum areas of facecoverage over the wearcr's nose and mouth, prohibiting openvents or valves, requiring a means for retaining the barrier facecovering on the wearer 's head, and providing a representationof product sizing.Manufacturers are further required to per-form a design analysis for assessing leakage of exhaled airfrom the barrier face covering. Manufact

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