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What do the BFE99 and PFE99 in the mask test mean

What do the BFE99 and PFE99 in the mask test mean

(Summary description)BFE99 often uses aerosol particles with an average particle diameter of 3 μm, while PFE99 generally uses sodium chloride particles with a diameter of 0.075 μm. Purely from the point of view of the filtering effect, PFE99 has a higher effect than BFE99.

What do the BFE99 and PFE99 in the mask test mean

(Summary description)BFE99 often uses aerosol particles with an average particle diameter of 3 μm, while PFE99 generally uses sodium chloride particles with a diameter of 0.075 μm. Purely from the point of view of the filtering effect, PFE99 has a higher effect than BFE99.

Information

The filter material of the mask is basically a meltblown non-woven fabric made of polypropylene material, and factors such as the pore size and thickness of the fiber affect the filtering effect. Particles of different diameters are filtered through different principles, such as particle volume, impact, and diffusion principles that result in being blocked by fibers, and some particles are filtered by electrostatic fibers through the principle of electrostatic attraction.

PFE99

The filtration efficiency test is carried out under the particle size specified in the standard, and different standards will use different sizes of particles for testing. BFE99 often uses aerosol particles with an average particle diameter of 3 μm, while PFE99 generally uses sodium chloride particles with a diameter of 0.075 μm. Purely from the point of view of the filtering effect, PFE99 has a higher effect than BFE99.

In the commonly heard standard test of KN95 masks, particles with an aerodynamic diameter of 0.3μm are used as the test object, because particles larger or smaller than this diameter are more likely to be intercepted by filter fibers, while particles with an intermediate size of 0.3μm It is more difficult to be filtered. Although the virus is small in size, it cannot be transmitted in the air alone. It needs droplets and droplet nuclei as carriers to be dispersed in the air, so it can be easily filtered out.

Particulate Filtration Efficiency PFE99 (Particulate Filtration Efficiency): The filtering effect of fine particles, the larger the value, the better the filtering effect.

Particle filtration efficiency BFE99 (Bacterial Filtration Efficiency): the filtration effect of particles, the larger the value, the better the filtration effect.

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The

The manufacturing process of oil absorbent pads  

Oil absorbent pads are a class of fibers and non-woven fabrics made of inert polypropylene melt-blown that have been specially treated to precisely absorb and retain liquids. The absorbent products of oil absorbent pads are all wrapped in polypropylene fibers or non-woven fabrics sewn with surface-active treatment agents.
2023-04-20
Introduction

Introduction of classification of oil absorbent pads

Oil-absorbing cotton products are usually in the form of oil absorbent pads (oil-absorbing sheets), oil-absorbing strips, oil-absorbing rolls, oil-absorbing pillows, and oil-absorbing fences. Oil absorbent pads, such as oil absorbent pads, are suitable for leakage treatment in a small area.
2023-04-13
Features

Features of Melt-blown fabric

Melt-blown fabric filter material is randomly distributed and bonded together by polypropylene microfibers. The appearance is white, flat, and soft. The material fiber fineness is 0.5-1.0μm. The random distribution of the fibers of the Melt-blown fabric provides more opportunities for thermal bonding between the fibers.
2023-04-06
Application

Application field of Melt-blown fabric

Scope of application of Melt-blown fabric (1) Melt-blown fabric can be used for medical and sanitary cloths: surgical gowns, protective clothing, sterile wraps, masks, diapers, women's sanitary napkins, etc.
2023-03-30

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Filter Material Adsorption Products Filter Adsorption Medical Accessories Medical Liquid Absorbent Pad Oil Absorbent Cotton Oil Absorbent Cord Graphene Respirator Mask Material PM2.5

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