The American Society for Testing and Materials (ASTM) recently released the organization's first product standard for protective masks in response to the new coronavirus (COVID-19) pandemic - ASTM F3502-2021, which is for standards that do not apply to ASTM F2100 ( N95/medical masks) and 42 CFR Part 84 (particulate protective respirators), but mask-related products with certain protective functions.
The ASTM F3502-2021 standard specifies minimum design requirements, performance ratings, labels, reports, etc. for disposable and reusable protective masks.
Submicron particle filtration efficiency and airflow resistance are classified separately, so there are 4 classification combinations:
1. Submicron particle filtration efficiency and airflow resistance are both Level 1 (minimum performance requirements);
2. The filtration efficiency of submicron particles is Level 1, and the airflow resistance is Level 2;
3. The filtration efficiency of submicron particles is Level 2, and the airflow resistance is Level 1;
4. Submicron particle filtration efficiency and airflow resistance are both Level 2.
★Allow mask manufacturers to provide bacterial filtration efficiency (BFE) results as supplementary information on the protective performance of masks, but not in place of submicron particle filtration efficiency.
For reusable protective masks, instructions for use and care should be given, including washing methods and service life (maximum number of washing or care cycles).
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