What is an anti particle mask?
       Anti particle masks are a type of respiratory protective equipment that primarily protects against particulate matter. Including dust, fog, smoke, and microorganisms.
       The particles that can enter the depths of a person's lungs are very small, with a particle size usually below 7 microns. They pose a great threat to health and are the culprit of various pneumoconiosis diseases. They are also the main protective object of particle masks.
       Anti particle masks usually refer to the parts that cover the mouth, nose, and chin of a person, relying on a three-dimensional structural design to form a sealed space with the face, and using human inhalation to force polluted air through filtration for breathing. The body of a mask is usually made of anti particle filtering material and fixed with a headband or ear strap.
       Classification of anti particle masks
       In Chinese standards, particulate matter masks are classified into KN and KP categories. KN type masks can only filter non oily particles, such as dust, acid mist, paint mist, microorganisms, etc. The suspended particles in air pollution are mostly non oily. KP type masks can filter both non oily particles and oily particles. Oily particles such as oil fumes, oil mist, etc. According to the difference in filtration efficiency, there are also differences of 90, 95100, which refer to filtration efficiency of 90%, 95%, and 99.97% under the standard test conditions. The KN90 mask commonly seen on the market is a mask that filters non oily particles with an efficiency of 90% under standard testing conditions.
       Selection of types of anti particle masks
       There are various types of anti particle masks, and the selection needs to be tailored to different job requirements and working conditions. The selection should be based on the concentration and toxicity of dust first. As a half face mask, all anti particle masks are suitable for environments where the concentration of harmful substances does not exceed 10 times the occupational exposure limit. Otherwise, a full face mask or a higher level of protection respirator should be used. If particulate matter belongs to highly toxic, carcinogenic, and radioactive substances, filter materials with higher filtration efficiency should be selected. If the particulate matter is oily, it is necessary to choose a filter material suitable for oily particulate matter. If the particulate matter is needle shaped fibers, such as slag cotton, asbestos, fiberglass, etc., the dust mask cannot be washed with water, and the mask with tiny fibers attached to the sealing area of the face can easily cause facial irritation and is not suitable for use.
       Selection of suitability for particulate matter masks
       Whether an anti particle mask truly provides protection depends not only on the choice of protective function, but also on suitability. There is no universal design that can fit everyone's face shape. At present, the certification testing of particulate matter masks does not guarantee that they are suitable for every specific user. If there is a leak, pollutants in the air will enter the breathing area from the leak, so unsuitable masks cannot provide effective protection.

       The method of selecting a suitable mask is to use a suitability test, which uses human taste and specialized tools to produce bitter or sweet particles. If the taste can still be felt after wearing the mask, it indicates that the mask is leaking, otherwise it indicates good suitability.

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