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Here's the document on the 3M N95 8210 which is a common N95 mask: https://multimedia.3m.com/mws/media/1425070O/3m-particulate-respirator-8210-n95-technical-spe

Here's the document on the 3M N95 8210 which is a common N95 mask: https://multimedia.3m.com/mws/media/1425070O/3m-particulate-respirator-8210-n95-technical-specifications.pdf https://multimedia.3m.com/mws/media/1425070O/3m-particulate-... • Straps – Thermoplastic Elastomer • Nose Clip – Aluminum • Nose foam - Polyurethane • Filter – Polypropylene • Shell – Polyester • Coverweb - Polyester Here's another document from Honeywell stating the main material is "flexible non-woven polypropylene fabric" https://www.honeywell.com/en-us/newsroom/news/2020/03/n95-masks-explained https://www.honeywell.com/en-us/newsroom/news/2020/03/n95-ma... Here's the link to Wikipedia and I quote "The N95 mask requires a fine mesh of synthetic polymer fibers, also known as nonwoven polypropylene fabric,[5] which is produced through a highly specialized process called melt blowing that forms the inner filtration layer that filters out hazardous particles.[6]" https://en.wikipedia.org/wiki/N95_mask https://en.wikipedia.org/wiki/N95_mask And you are an expert? Basic Google just backed me up.

NicoJuicy 7y ago
No, i am not an expert and didn't made a single statement because of that. I don't know the answer. The only thing I do know is that a medical/surgical N95 mask is different from a standard N95 mask. This would be reason enough to undermine your claim, according to me. But as stated, I'm not an expert. A friend+client of mine in construction also has N95 masks and those are not valid for use in the hospital, he said. Also basic Google backed me up :) Ps. Thanks for trying to back up your claim with valid sources ;)!
- no-s 7y ago
  the 8511 masks used in construction have a one-way valve for free-flow exhalation. The mask only protects the wearer from particulates in the environment. It doesn't protect the environment from particulates exhaled by the wearer. These would not be suitable for use by healthcare workers.
  - RegnisGnaw 7y ago
    The 3M 8210 N95 respirator which I referenced above doesn’t have a valve.
    - no-s 7y ago
      nevertheless 8511 masks disappeared from the market, and Amazon is telling me they are available only to gov't and institutions. On eBay the masks are listed at over $25 apiece. Unfortunately when doing dusty work one mask will only last for a day or less. I started having trouble sourcing these in late January.
      - no-s 7y ago
        it turns out I have everything I need to manufacture small qty runs (100s) of effective masks at about $1.60ea. So I'm just going to do it to stock up my household for the duration. QC is my only concern, since I have to use a qualitative test (smell the bacon frying).
- RegnisGnaw 7y ago
  Care to provide a basic Google source that says N95 Surgical Respirators are made from pulp? Okay, let me provide you another source or two. Here's the 3M 1860/1860S N95 Surgical Respirator. FDA approved for hospital use in the US (also the standard one used). Approved by Health Canada in Canada. Approved by TGA in Australia. This is the light blue one you see on the news. * Straps: Braided Polyisoprene * Staples: Steel * Nose Clip: Aluminium * Nose Foam: Polyurethane Foam * Filter: Polypropylene/Polyester * Shell: Polypropylene * Coverweb: Polypropylene https://multimedia.3m.com/mws/media/1538979O/3m-disposable-respirator-1860-1860s-technical-data-sheet.pdf https://multimedia.3m.com/mws/media/1538979O/3m-disposable-r... Here's the 3M 1804/1804S N95 Surgical Respirator (https://multimedia.3m.com/mws/media/1547881O/3m-anz-psd-healthcare-respirator-and-surgical-mask-1804-s-technical-data-sheet.pdf https://multimedia.3m.com/mws/media/1547881O/3m-anz-psd-heal...). Also approved by FDA for hospital use. Same with Health Canada and Australian TGA. This is the white duckbill type you see on the news. * Straps: Polyisoprene * Staples: Steel * Nose Clip: Aluminium * Filter: Polypropylene * Coverweb: Polypropylene
  - NicoJuicy 7y ago
    It seems to be the fibre, but I'm not enough acquainted with materials to know where or what. The wording seems to be that is literally used in surgical masks: https://www.vancouverislandfreedaily.com/business/nanaimos-harmac-mill-works-to-fill-doubled-pulp-order-for-medical-masks-and-gowns/ https://www.vancouverislandfreedaily.com/business/nanaimos-h... > K10S pulp is made from western red cedar that produces a soft fibre that makes it suitable for the final products made from it. “It’s been tweaked over the years to come up with the right formula that allows it to go into the medical supplies,” Sampson said. Your source indeed says: these materials are used. But it never says they are listing all the materials that are used. It could be that they mention it because those materials can touch the skin. I don't see anything that mentions the filtering technique/materials inside of those masks. I also don't see how the materials are tweaked. So I don't think it's as easy to read the brochure and believe that they mention everything on it. I guess the Polypropylene fibrids in the filter contains the K10S ( = the pulp ) An indication to support this can be found here: http://www.freepatentsonline.com/8172035.html http://www.freepatentsonline.com/8172035.html ( Search for K10S in the text and read the entire surrounding text) As stated before, I'm not an expert.

NicoJuicy 7y ago

No, i am not an expert and didn't made a single statement because of that. I don't know the answer. The only thing I do know is that a medical/surgical N95 mask is different from a standard N95 mask. This would be reason enough to undermine your claim, according to me. But as stated, I'm not an expert. A friend+client of mine in construction also has N95 masks and those are not valid for use in the hospital, he said. Also basic Google backed me up :) Ps. Thanks for trying to back up your claim with valid sources ;)!

no-s 7y ago
the 8511 masks used in construction have a one-way valve for free-flow exhalation. The mask only protects the wearer from particulates in the environment. It doesn't protect the environment from particulates exhaled by the wearer. These would not be suitable for use by healthcare workers.
- RegnisGnaw 7y ago
  The 3M 8210 N95 respirator which I referenced above doesn’t have a valve.
  - no-s 7y ago
    nevertheless 8511 masks disappeared from the market, and Amazon is telling me they are available only to gov't and institutions. On eBay the masks are listed at over $25 apiece. Unfortunately when doing dusty work one mask will only last for a day or less. I started having trouble sourcing these in late January.
    - no-s 7y ago
      it turns out I have everything I need to manufacture small qty runs (100s) of effective masks at about $1.60ea. So I'm just going to do it to stock up my household for the duration. QC is my only concern, since I have to use a qualitative test (smell the bacon frying).
RegnisGnaw 7y ago
Care to provide a basic Google source that says N95 Surgical Respirators are made from pulp? Okay, let me provide you another source or two. Here's the 3M 1860/1860S N95 Surgical Respirator. FDA approved for hospital use in the US (also the standard one used). Approved by Health Canada in Canada. Approved by TGA in Australia. This is the light blue one you see on the news. * Straps: Braided Polyisoprene * Staples: Steel * Nose Clip: Aluminium * Nose Foam: Polyurethane Foam * Filter: Polypropylene/Polyester * Shell: Polypropylene * Coverweb: Polypropylene https://multimedia.3m.com/mws/media/1538979O/3m-disposable-respirator-1860-1860s-technical-data-sheet.pdf https://multimedia.3m.com/mws/media/1538979O/3m-disposable-r... Here's the 3M 1804/1804S N95 Surgical Respirator (https://multimedia.3m.com/mws/media/1547881O/3m-anz-psd-healthcare-respirator-and-surgical-mask-1804-s-technical-data-sheet.pdf https://multimedia.3m.com/mws/media/1547881O/3m-anz-psd-heal...). Also approved by FDA for hospital use. Same with Health Canada and Australian TGA. This is the white duckbill type you see on the news. * Straps: Polyisoprene * Staples: Steel * Nose Clip: Aluminium * Filter: Polypropylene * Coverweb: Polypropylene
- NicoJuicy 7y ago
  It seems to be the fibre, but I'm not enough acquainted with materials to know where or what. The wording seems to be that is literally used in surgical masks: https://www.vancouverislandfreedaily.com/business/nanaimos-harmac-mill-works-to-fill-doubled-pulp-order-for-medical-masks-and-gowns/ https://www.vancouverislandfreedaily.com/business/nanaimos-h... > K10S pulp is made from western red cedar that produces a soft fibre that makes it suitable for the final products made from it. “It’s been tweaked over the years to come up with the right formula that allows it to go into the medical supplies,” Sampson said. Your source indeed says: these materials are used. But it never says they are listing all the materials that are used. It could be that they mention it because those materials can touch the skin. I don't see anything that mentions the filtering technique/materials inside of those masks. I also don't see how the materials are tweaked. So I don't think it's as easy to read the brochure and believe that they mention everything on it. I guess the Polypropylene fibrids in the filter contains the K10S ( = the pulp ) An indication to support this can be found here: http://www.freepatentsonline.com/8172035.html http://www.freepatentsonline.com/8172035.html ( Search for K10S in the text and read the entire surrounding text) As stated before, I'm not an expert.