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Types of masks and standard classification methods
The filter efficiency of a mask refers to the filter efficiency of melt blown. Because melt blown has the characteristics of filtering dust, particles, dust, pollen and so on. At present, there are several filtering effects as follows: 1. BFE95 explanation: When tested at a flow rate of 32 liters, the filtering effect of 3 micron bacterial particles reaches 95%. Gram weight: 18-30g2, BFE99 explanation: Detected at a flow rate of 32 liters, the filtering effect of 3 micron bacterial particles reaches 99%. Weight: 20-30g3, VFE99 Explanation: Detected at a flow rate of 32 liters, the filtering effect of 3 micron virus particles reaches 99%. Weight: 25-30g4, PFE99 Explanation: Detected at a flow rate of 32 liters, the filtering effect of 0.1 micron particles reaches 99%. Gram weight: 24-30g5, KN90 Explanation: Detected under 55 liters of flow, the filtration effect of 0.3 micron solid particles reaches 90%. Gram weight: 30-50g6, N95 Explanation: Detected under 85 liters of flow, the filtration effect of 0.3 micron solid particles reaches 95%. Gram weight: double layer 50g7, N99 Explanation: Detected under 85 liters of flow, the filtration effect of 0.3 micron solid particles reaches 99%. Weight: Double-layer 80g8, FFP1 Explanation: It is equivalent to the standard of N90. Weight: 50g9, FFP2 Explanation: It is equivalent to the standard of N95. 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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Even textile testing equipment are being made fine with advanced equipment.
Ball Burst Method (ASTM D3787): Steel ball penetration for textiles/films using testers like GT-C02-2.
Hydraulic Method (ISO 13938.1): Fluid pressure on rubber diaphragm for industrial fabrics via GT-C12A.
Pneumatic Method (ISO 13938.2): Compressed air for breathable materials tested with GT-C12B.
Results are influenced by raw materials, yarn properties,
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