What is N95 Mask Used for?
N95 respirators are an important part of healthcare personal protective equipment (PPE), filtering out over 95% of particles as small as 0.3 microns when properly fitted to the user’s face. They have been found to result in fewer viral infections among healthcare workers compared to surgical masks.
N95 Mask Material
N95 masks made from synthetic plastic fibers are the most common. These plastic fibers are similar to the fibers in synthetic and polyester shirts many people wear.
N95 Masks Made From Synthetic Plastic
For example, let’s take the 3M 9332 masks I wear in Beijing. Technically this is an N99 (FFP3) mask, but the idea is the same.
3M makes the filter material in the 9332 mask using polypropylene (PP) fiber.
N95 Masks Made Using This Raw Material
Polypropylene in the filter medium is a plastic. Manufacturers make this plastic out of fossil fuels like oil.
That means the fibers in these masks are similar to the fibers in our clothes. Companies use these fibers to make clothes like quick-dry shirts, rain jackets, yoga pants, or any stretchy fabric.
Mask makers often give the polypropylene material an electrostatic charge. That static charge makes the filters more effective. 3M has a great video explaining how static charge works in masks:
N95 Masks Also Contain These Materials
Besides the filter material, N95 masks can also include other materials, such as metal. For example, the 3M 9502 (that Smart Air tested for decontamination in the microwave) contains several metal parts. The mask uses steel for the staples (which secure the straps to the mask) and aluminum for the bendable nose clip.
To make the straps of the 9332 mask, 3M uses polyisoprene. Polyisoprene is in natural rubber and also synthetic rubber. Other masks have elastic fabric straps.
N95 masks are made from synthetic plastic fibers, usually polypropylene (PP). They also contain rubber and metal for the straps, staples, and nose bar.
N95 Are Ratings, Not Materials
However, it is worth keeping in mind that N95 is a rating certification about performance, not materials. The N95 rating requires masks to capture 95% of particles. Thus, theoretically, N95 masks could be made out of any sort of material as long as they meet these requirements.
This chart explains exactly what’s required of masks to be certified as N95 in the US versus similar ratings in the EU, China, Australia, Korea, and Japan. Although there are differences in many aspects, none of the agencies require a specific mask material.
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I had a severe facial, tongue swelling from an N-95 mask and the co. would not tell me how it was made. Response will be 7-10 days. The information you provided helped. I am a retired RN and never had a reaction to 3-M or Kimberly-Clark N-95 masks used in the hospital. Please help.
Do most use rubber?
Is N95 mask eco friendly, and biodegradable. Is it save for the earth ? . If yes please explain and if not be honest.
Can we make masks biodegradable ?.
I have purchased a mask which has six layers- outer layer is an air mesh, then a spun bonded material for Fluid protection, 3rd layer is Melt blown material for Bacteria filter/small particle filter, followed by another layer of Melt Blown material , then a layer of Spun bonded material, and finally towards the face an inner layer for moisture controlled anti-bacterial finish. The sample testing was done as per ASTM F 2101, and the sample showed 97.3% bacterial filtration efficiency against Staphylococcus aureus ATCC 6538, when tested according to the ASTM F 2101 test method. The mask is washable… Read more »
Are surgical masks made out of a different material ? I’m asking because the coronavirus survives up to 7 days on them.