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Types and standard division methods of mask effect
2022-10-17
Gester Instruments
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The filtration efficiency of the mask refers to the filtration efficiency of the meltblown. Because meltblown has the characteristics of filtering dust, particulate matter, dust, pollen and so on. At present, there are several filtration efficiencies as follows: 1. BFE95 explanation: detected at a flow rate of 32 liters, the filtration effect of 3-micron bacterial particles reaches 95%. Gram weight: 18-30g2, BFE99 Explanation: Detected at a flow rate of 32 liters, the filtration effect of 3 micron bacterial particles reaches 99%. Weight: 20-30g3, VFE99 Explanation: Detected at a flow rate of 32 liters, the filtration effect of 3-micron virus particles reaches 99%. Gram weight: 25-30g4, PFE99 Explanation: Detected at a flow rate of 32 liters, the filtration effect of 0.1 micron particles reaches 99%. Gram weight: 24-30g5, KN90 Explanation: Detected at a flow rate of 55 liters, the filtration effect of 0.3 micron solid particles reaches 90%. Gram weight: 30-50g6, N95 Explanation: Detected at a flow rate of 85 liters, the filtration effect of 0.3 micron solid particles reaches 95%. Gram weight: Double layer 50g7, N99 Explanation: Detected at a flow rate of 85 liters, the filtration effect of 0.3 micron solid particles reaches 99%. Gram weight: double layer 80g8, FFP1 explanation: equivalent to the standard of N90. Gram weight: 50g9, FFP2 explanation: equivalent to N95 standard. Gram weight: 50g10, KN90: Filtration efficiency:≥90%11, KN95: Filtration efficiency:≥95%12, KN100: Filtration efficiency:≥99.97%13, KP90: Oily Filtration Efficiency:≥90%14, KP95: Oily Filtration Efficiency:≥95%15, KP100: Oily Filtration Efficiency:≥100%
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