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Meltblown Middle Layer —acts as the primary filtration system for the mask Soft Spunbond Polypropylene — used for inner and outer facings and for an extra layer of protection Smooth Cellulose —used for inner and outer facings

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Mar 31, 2020 · Filter media . Both medical masks and N95 respirators are made of three plies of media an outer veil made of spunbond (SB) PP facing outward; a filtration layer made of charged MB PP electret in the middle; and an inner veil in contact with the face made of needled or thermal bond nonwovens for the N95 and SB thermal bond or paper tissue for medical masks.

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Regular dust and pollen masks should not be used for protection again bacteria and viruses. The best mask for bacteria and virus protection is an N95 or N100. Bacteria and Virus Mask Differences The term “N95” and “N100” refers to a standard established by the National Institute for Occupational Safety and Health (NIOSH).

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Jan 16, 2020 · A proper 3-ply surgical or medical mask, on the other hand, has three layers – each with very specific functions an outer hydrophobic layer, which repels water, blood and body fluids, a middle filter layer that is designed to filter bacteria, and; an inner hydrophilic layer…

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Jun 28, 2010 · The authors reported protection factor levels of 2–3, 4–6, and 66–141 for tea cloths, surgical masks, and FFP2 masks, respectively, under various test conditions. The fabric materials tested in our study might also be expected to provide marginal levels of respiratory protection for 20–1000 nm aerosols (droplet nuclei).

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