Mask is a kind of sanitary product. It generally refers to the air that is worn on the nose and nose to filter the air that enters the nose and nose to achieve the utensils that block harmful gases, odors, droplets in and out of the wearers mouth and nose, and are made of gauze or paper.
What are the functions of PM2.5 mask
The outer layer of the PM2.5 mask is a antibacterial fabric with a carbon fiber felt pad, polymer fabric, non -woven fabric, etc.The middle layer is a warm filling. The bottom layer is PM2.5 filter. In the middle of the filter, dust -free particle activated carbon is added. The filter is treated with nano -silver sterilizers, and the filterability is about 95%to 99%.The main materials of the PM2.5 mask are non -woven fabrics, filter paper, etc., and the most important thing is to use lead charcoal cloth, which can play a good anti -virus function.
Gravity settlement: Large particulate matter is directly filtered on the filtering material due to gravity in the air flow.
Interception: The radius of the smaller particles (nano particles) that is fully moved along the direction of the airflow is stopped when the radius of the mask filter fibers is stopped.
Inertia impact: High -quality particulate matter (particle size greater than 1um) is influenced by inertia and was filtered on the filter fiber.
Disclosure: Affected by air molecular thermal movement, very small particles (particle size less than 0.1um) were hit by air molecules to do Brown movement, and random contact with the filter fiber was filtered.
Static electricity: Filtering fiber with weak and static electricity is filtered out of the particulate matter through static attractions.
What are the functions of PM2.5 mask
Cotton mask: only with the function of preventing cold and warmth
The surface of the mask is large, and the particle size is only 2.5 microns with a particle size of 2.5 microns. Some filtering effects of more than 90%of the cotton masks are very resistant to the airflow. People will cause breathing difficulties after wearing.
Ordinary gauze mask: not blocked below PM5
The most common principle of gauze mask blocking is a mechanical blocking effect. Through this layer of mechanical blocking, large particles can be blocked, but the particles with less diameter less than 5 microns cannot be blocked, let alone PM2.5particulates.
Medical ordinary mask: Top pipe for PM4
Medical surgical masks and medical disposable masks can block the diameter of more than 4 microns. According to general medical standards, for 0.3 micron particles, medical surgical masks are 18.3%, and ordinary disposable medical masks are 85.6%.
Activated carbon mask: does not increase protection efficiency
Activated carbon masks have a reduction in certain odors, but the protection efficiency of particulate matter has not been significantly enhanced significantly.Activated carbon itself is a particle, which is a harm for patients with chronic a respiratory disease or weak.
N95 mask: most PM2.5 is blocked
Medical N95 masks can be blocked by large particles. When detecting in a mask closed laboratory, the transmission rate of the medical N95 mask is only 0.425%. It can be said that more than 99%of the particles are blocked.
How to buy PM2.5 mask
Applicable place
There are many masks. Each suitable for different places, such as just responding to dust haze weather (ordinary use), whether oil -proof particulate matter is required, whether there is the ability to block pressure and body fluid splashing and penetrateThe ability to fight the fire to burn it (for welding), whether the band needs to reduce the odor function, and so on.
Style packaging
There are generally two types of masks: folding and cup cover (stereo), folding masks are easy to carry, and the volume is small after folding, which is easy to store.It is a traditional design that is not so convenient to carry.It is best to choose those mask products with independent small packaging to avoid secondary pollution to the greatest extent.
Filtration efficiency
The filtration efficiency can be used in the range of general dust and fog in the range of 80-90%. The range is 94-95%for the protection of various smoke and pathogenic microorganisms, including the dust of high toxic substances;Protect all kinds of particulate matter, protect radioactive particulate matter or particulate matter containing highly toxic substances.
Dense degree
The mask anti -leakage design is to prevent air from using the gap between the mask and the human face without filtering the technical requirements of being inhaled.When the shape of the mask is not close to the face, the dangerous matter in the air will leak from the dense place and enter the human respiratory tract. Therefore, the mask is good, it should be suitable for your face shape, and it must be comfortable.
wearing method
The mask has the headband of the upper and lower straps, and the two straps are set on the left and right as the ear strap.Ear -type design is to cater to the wearing habits of Asians, which has a small impact on the hairstyle, but it is easy to compress the root of the ear, which is not as comfortable as the head.The neck band design can solve the pressure of the ear strap on the ears, but also solve the inconvenience of picking up the hat to pick up the mask.
Accessory design
The mask fixes with elasticity to improve comfort.If the headband can adjust the length, it will be more favorable to the large face users, reducing the discomfort caused by the tightness of the headband.Instead of sealing in the nose, sweat absorption can improve the sealing of the bridge of the nose.Add sealing ring on the inner face to the face, which can improve the sealing, easy to wipe, clean, and extend the use time.

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