5 Layer Disposable Kn95 Face Mask Design Antidust Filter 
Description

♥ Common Sense N95 /KN95/FFP2 masks

 masks, once relegated to specific professions, are quickly becoming commonplace.

• N: This is a Respirator Rating Letter Class. It stands for "Non-Oil" meaning that if no oil-based particulates are present, then you can use the mask in the work environment.Other masks ratings are R (resistant to oil for 8 hours) and P (oil proof).
• 95: Masks ending in a 95, have a 95 percent efficiency. Masks ending in a 99 have a 99 percent efficiency. Masks ending in 100 are 99.97 percent efficient and that is the same as a HEPA quality filter.
• .3 microns: The masks filter out contaminants like dusts, mists and fumes. The minimum size of .3 microns of particulates and large droplets won't pass through the barrier.
• Standards: N95 mask are considered functionally equivalent to certain mask regulated under non-U.S. jurisdictions, such as FFP2 mask of the European Union and KN95 mask of China. even slightly different criteria are used to certify their performance, such as the filter efficiency, test agent and flow rate, and permissible pressure drop, our mask can meet all the standards

♥ Detailed Features N95/KN95 face mask

Key Features

• FDA/GB2626-2006 approved N95 rating
• Nose strip: Aluminum strip seal
• Ultrasonically welded & Adjustable ear Straps
• Particle Filtration Efficiency(PFE) : ≥99% ,N95 mask follow N99 grade mask
• Bacterial Filtration Efficiency(BFE): ≥99%.
• Flame Retardation Properties(FRP): continuous burning time <5 seconds.
•  ADVANTAGE: Allowing smooth breathing, reducing heat and moisture accumulation.

Material & Layer Composition

• The filtration material on the mask is an electrostatic non-woven polypropylene fiber.
• 5 layers filter: the first layer (outermost layer) is 50g non-woven fabric, the second layer is 25g melt-blown fabric, the third layer is 50g hot air cotton, the fourth layer is 25g melt-blown fabric, and the fifth layer (innermost layer) is 25g non-woven fabric
• Nose Clip: Aluminum
• Ear straps: High elastic ear strap
• Approximate weight of each N95/KN95 mask:5g

Approvals & Standards

• FDA certificated N95 particulate respirator
• Meets requirements for a minimum 95% filtration efficiency against solid and liquid aerosols that do not contain oil.
• FDA Owner Number: 10068276
• China GB2626-2019 certificated KN95 particulate respirator
• GB2626-2019 approval number: 200156943

Test Result & Respiratory resistance change

Even if our mask is used for 12 hours, it can still maintain at least 98% filtration efficiency, but as particles continue to adsorb and settle on the mask, the respiratory resistance will become greater and greater.

                                                        Respiratory resistance changing curve with adsorbed particles

According to the test results, we recommend that the mask should be used for 6 ~8 hours.

Correctly use N95 /KN95 masks for best protection