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Mask standards of different countries

Release time: 2021-05-11

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Mask standards of different countries

The sudden new coronavirus has seriously affected our lives. Masks are the "first line of defense" for the prevention and control of pneumonia caused by the novel coronavirus. Reasonable selection and correct wearing of masks are very important. The standards for masks vary from country to country. Today, let’s learn some standards for masks in different countries.


mask


1. Basic classification

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: protection of 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, allowing fine dust to penetrate the mask. Therefore, the anti-aerosol-containing filter material must undergo special electrostatic treatment to achieve the purpose of preventing fine 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. European Union EN149 standard:

FFP1 masks: the lowest filtering effect is 80%

FFP2 mask: the lowest filtering effect is 94%

FFP3 masks: the lowest filtering effect is 97%

3. Australia AS1716 standard

P1: The minimum filtering effect is 80%

P2: The lowest filtering effect is 94%

3. Chinese national standard GB6223-86UDC614.894:

The above inspection standards are all tested with a particle size of 0.3 microns. The detection flow rate of the EU standard is 95L/min, and the American standard is 85L/min. my country's national standard uses more than 90% of the suspended particle size less than 5 microns, more than 70% less than 2 microns, and the flow value is 42.5L/min. 


In the testing and certification of filter materials, the idea of "worst case" is adopted, that is, the conditions when testing experiments in the laboratory are set to the worst conditions. For example, the aerodynamic calculated diameter of the ammoniated sodium salt or DOP oil mist used in the efficiency experiment is 0.3 microns, which represents the size of the extremely small particles that are most easily penetrated by the filter material. Respiration during heavy physical labor, the filter material must be pretreated with high temperature and humidity before the experiment, which represents a harsh working environment. All of these are designed to test if the filter material can pass the test under such harsh conditions. Reach the corresponding efficiency level, then in actual application, it will be able to protect the health of workers more effectively. 


KN95


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 without being inhaled by people. There are many micropores in the internal structure of activated carbon that can form a huge specific surface area. These micropores can inhale poisonous vapors and gas molecules of different molecular sizes without escaping. The treatment and installation requirements of activated carbon are very high. If improper treatment or the activated carbon particles are very coarse, resulting in gaps between the particles, the poisonous gas will penetrate into the respiratory tract from the gaps without being adsorbed. Therefore, it is very unscientific to replace the bagged activated carbon by yourself. The activated carbon in a good chemical filter box should be densely packed, with a small particle size and a large specific surface area, so that the anti-virus time will be long. At the same time, it should also consider the low respiratory resistance and comfortable wearing.


Zhongshan Saifute Labor Protective Articles Co., Ltd. is a professional mask supplier. Our main products includes: FFP3 mask, FFP2 mask, KN95 mask and so on. Our technology is advanced and our quality is excellent. If you need masks, don't hesitate to contact us.

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