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There are many materials for the filter material of dust-proof masks, including ordinary fabrics, animal hair, and non-woven fabrics. Very popular in the national standard is an activated carbon fe...

The anti-side leakage design of the mask is a technical requirement to prevent air from being sucked through the gap between the mask and the human face without being filtered.

The dust blocking efficiency of the mask is based on its blocking efficiency for fine dust, especially for respirable dust below 2.5 microns.

It refers to the clean air source isolated from harmful substances, through the power action such as compressor, compressed gas cylinder device, etc

Anti-poisonous filter materials generally use activated carbon or chemically treated activated carbon as the material, and filter the poisonous gas or vapor through adsorption or chemical reaction ...

The above inspection standards except the Japanese standard (0.06-0.1 micron) are tested with a particle size of 0.3 micron.

FFP1 masks: the lowest filtering effect "80%. FFP2 mask: the lowest filtering effect "94%.

When the carrier of some particulate matter is oily, and these substances attached to the electrostatic non-woven fabric will reduce the electrical properties and allow the fine dust to penetrate.

Masks are divided into medical masks and non-medical masks, (and the latest confirmed) civilian sanitary masks.

Flat masks are divided into: cotton masks, non-woven masks, polymer masks, activated carbon powder filter masks, activated carbon fiber felt masks.

In 1910, the plague broke out in Harbin, my country. Dr. Wu Liande, then deputy supervisor of the Beiyang Army Medical College, invented the "Wu's Mask".

At the beginning of the 13th century, masks only appeared in the Chinese court. To prevent his breath from spreading to the emperor’s food, the waiter used a silk and golden thread to make a mask.