有醫用口罩的話,查一下BFE,PFE,更好的還有VFE
Standard Specification for Performance of Materials Used in Medical Face Masks
TEST | LEVEL 1 BARRIER | LEVEL 2 BARRIER | LEVEL 3 BARRIER |
---|---|---|---|
ASTM F1862(Fluid Resistance) | 80 mmHg | 120 mmHg | 160 mmHg |
MIL-M-36954 C: ΔP (Breathability) | < 4 mm H2O | < 5 mm H2O | < 5 mm H2O |
ASTM F2101: BFE (Filtration 3μm) | ≥ 95% | ≥ 98% | ≥ 98% |
ASTM F2299: PFE (Filtration 1μm) | ≥ 95% @ 0.1 micron | ≥ 98% @ 0.1 micron | ≥ 98% @ 0.1 micron |
16 CFR Part 1610: Flame Spread (Flammability) | Class 1 | Class 1 | Class 1 |