Masks are a kind of sanitary products, which are generally worn on the mouth and nose to filter the air entering the mouth and nose to block harmful gases, odors, droplets, viruses and other substances. They are made of gauze or paper. Masks have a certain filtering effect on the air entering the lungs. When respiratory infectious diseases are prevalent, when working in dust and other polluted environments, wearing masks has a very good effect. Masks can be divided into air filter masks and air supply masks.
N series: no time limit for protection of non-oily suspended particles
R series: Protection against non-oily suspended particles and sweat-oily suspended particles for eight hours
P series: protect non-oily suspended particles and sweat-oily suspended particles without time limit
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. Therefore, the anti-aerosol-containing filter material must undergo special electrostatic treatment to prevent fineness. The purpose of dust. Therefore, each series is divided into 3 levels: 95%, 99%, 99.97% (referred to as 95, 99, 100 for short), so there are 9 sub-categories of filter media.
2. EU EN149 standard:
FFP1 masks: the lowest filtering effect "80%
FFP2 mask: the lowest filtering effect "94%
FFP3 masks: the lowest filtering effect "97%
3. Australian AS1716 standard
P1: Minimum filtering effect "80%
P2: Minimum filtering effect "94%
Air-supplied mask refers to a clean air source isolated from harmful substances, which is delivered to the face of a person through a tube and a mask through a power action such as a compressor, a compressed gas cylinder device, etc. for human breathing.
Air filter masks are the most widely used category in daily work. The structure of an air filter mask should be divided into two parts. One is the main body of the mask, which can be simply understood as a mask shelf; the other is the filter material part, including filter cotton for dust prevention and anti-virus. Chemical filter box, etc.
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