In these uncertain times, we should all be prepared for the unknown. For this, we are offering protective masks. There are times when you might want to have access to your own supply of masks. We understand that they are not required all of the time, but there will be those times when you will be better off with them than without. We can not rely on our local, regional, state or federal government to protect us.
Filtering face-piece respirators (FFR), which are sometimes called disposable respirators, are subject to various regulatory standards around the world. These standards specify certain required physical properties and performance characteristics in order for respirators to claim compliance with the particular standard. During pandemic or emergency situations, health authorities often reference these standards when making respirator recommendations, stating, for example, that certain populations should use an “N95, FFP2, or equivalent” respirator.
We are proud to offer for your consideration the following masks certified as such. These masks are compliant under both of the following certifications.
- FFP2 (Europe EN 149-2001)
- KN95 (China GB2626-2006)
As shown in the following summary table, respirators certified as meeting these standards can be expected to function very similarly to one another, based on the performance requirements stated in the standards and confirmed during conformity testing. One notable comparison point is the flow rates specified by these standards for the inhalation and exhalation resistance tests. Inhalation resistance testing flow rates range from 40 to 160L/min. Exhalation resistance testing flow rates range from 30 to 95 L/min. This chart shows a representative filter pressure drop curve. If one filter is tested at a high flow rate, the pressure drop performance will be relatively high. If that same filter is tested at a low flow rate, the pressure drop performance will be relatively low. (3m.com)
Based on this comparison, it is reasonable to consider China KN95, AS/NZ P2, Korea 1st Class, and Japan DS FFRs as “equivalent” to US NIOSH N95 and European FFP2 respirators, for filtering non-oil-based particles such as those resulting from wildfires, PM 2.5 air pollution, volcanic eruptions, or bioaerosols (e.g., viruses). (3m.com)
Filter performance– the filter is evaluated to measure the reduction in concentrations of specific aerosols in air that passes through the filter.
Test agent- the aerosol that is generated during the filter performance test.
Total inward leakage (TIL)– the amount of a specific aerosol that enters the tested respirator facepiece via both filter penetration and faceseal leakage, while a wearer performs a series of exercises in a test chamber.
Inward leakage (IL)– the amount of a specific aerosol that enters the tested respirator facepiece, while a wearer performs a normal breathing for 3 minutes in a test chamber. The test aerosol size (count median diameter) is about 0.5 micrometer.
Pressure drop– the resistance air is subjected to as it moves through a medium, such as a respirator filter.