“N95”non woven material & “BFE99%” non woven material Introduction and distinction
N95 non woven fabric：
Under the test conditions specified by the NIOSH standard, the efficiency of filtering non-oily particles reaches 95%.
“N” means： “not resistant to oil”（The fumes produced by cooking are oily particles, and the droplets produced by people talking or coughing are not oily particles.）
“95”means： The filtration efficiency reached 95% under the test conditions specified by the NIOSH standard. Exposure to a specified number of dedicated test particles, the concentration of particles in the mask is 95% lower than the concentration of particles outside the mask.
（The value of 95% is not the average value, but the minimum value of the filtration efficienc.）
NIOSH-certified particle barrier grades include: N99, N100, R95, R99, R100, P95, P99, and P100, all of which cover the N95’s range of protection.According to the oil resistance, it is divided into “N”, “R”, and “P”, and is classified into “95”, “99”, and “100” according to the capture rate.
“R” means： “resistant to oil” and is suitable for oily or non-oily particulate matter. If it is used for the protection of oily particulate matter, it should not be used for more than 8 hours.
“P” means： “oil proof” and is suitable for oily or non-oily particulates. For oily particulates, the time of use should follow the manufacturer’s recommendations.
（”99″ and “100” refer to the level of filtration efficiency, respectively. “99” in the capture ratio means 99% or more, and “100” means 99.7% or more.）
In addition, when the N100, P100, and R100 three-type masks are tested with 0.3 micron particles, the barrier efficiency must be above 99.7%,
and the N99, P99, and R99 filtering rate are all above 99%, while the N95, P95, and R95 filtering rate are all above 95%.
BFE99% non woven fabric：
BFE 99% is the filtration data of Nelson Labs for particles with a particle size of about 0.3 microns in the air. The mask that can reach BFE 99% can prevent PM2.5.
“BFE”means：Bacterial Filtration Efficiency, and“99%”means that the filtration efficiency can reach 99%. BFE 99% means that the bacterial filtration efficiency reaches 99%.
Usually, the medical mask is composed of three layers of non-woven fabrics, and two layers of medical hygienic fiber non-woven fabrics are added with a layer of filtering melt-proof fabric of 99.999% above. The ultrasonic welding is used for the filter, and the nose bridge is environmentally friendly. Plastic strips do not contain any metal.
BFE 99% material masks are widely used in hospitals, electronics, pharmaceuticals, etc.
In addition, there are “VFE99% ”and“ BFE99%”, VFE99% means “Virus Filtration Efficiency reaches 99%”, and PFE99% means “Particle Filtration Efficiency reaches 99%”.