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pp non woven 20 25gsm inner layer face mask size

Disposable Medical Surgical Face Mask with 3 Ply Filter: Material: 1st layer: 20gsm PP non woven: 2rd layer: 20gsm filter paper: 3th layer: 25gsm PP non woven( ES material available) Testing Standard ASTM F2100 Level 1 BFE > 95%: ASTM F2100 Level 1 PFE > 95%: ASTM F2100 Level 1 Delta P < 4.0: ASTM F2100 Level 1 Fluid Resistance 80 mmHg

The filtration efficiency was 74% for a 2-layer woven nylon mask with ear loops (Easy Masks LLC) with an aluminum nose bridge and nonwoven filter insert which, interestingly, had a slightly higher filtration efficiency after being washed once, 49.9% for a folded, cotton bandana, 39.3% for a single-layer woven polyester/nylon mask with ties ...

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