Protective masks are needed in many scenes in life, suc […]
Protective masks are needed in many scenes in life, such as dust, insects and fly flies on the way to and from get off work. For example, masks are needed to protect our lungs in specific industrial operating environments. So, what are the KN and KP of the mask? What is the difference between KN90 and KN95?
In the national standard, dust masks are divided into KN and KP categories, KN stands for non-oily particles, and KP stands for oily particles.
KP masks This kind of masks can filter both non-oily particles and oily particles. Oil fume, oil mist, and asphalt fume are all oily particulate matter.
KN masks are suitable for filtering non-oily particles. KN90 and KN95 can filter 90% and 95% of particles respectively. However, the higher the filtration efficiency, the worse the air permeability.
The difference between KN90 and KN95
1. Different levels
The protection level of non-oily particles of mask kn90 is lower than kn95.
2. Different filtration efficiency
Mask kn90 can filter more than 90% of particles; mask kn95 can filter more than 95% of particles.
3. Different air permeability
The higher the filtration efficiency of the mask, the worse the air permeability. Therefore, the air permeability of kn90 is better than kn95.
Recommendations for purchasing protective masks
If you want a good filtering effect, choose KN95 protective mask; if you want good air permeability, choose KN90 protective mask.