Vapor transmission through a permeable barrier is related to temperature gradient.... If it's warmer or similar temps outside the suit it will be very slow to breath and rapport the sweat... Works really well a cold (sub-freezing) temps and in low humidity environments
With numerous grades of Tyvek, the actual air porosity can vary by grade selected. However to use as a barrier for different applications there is always a tradeoff with air flow. Tyvek hazmat suits are a case-in-point, the human body pumps out a lot of water vapor in a short time and the hazmat barrier needs won't allow for breathability of normal clothing. There is also a comfort factor. Ever sweat in a nylon shirt vs a cotton one? I'm guessing after a nylon episode you'd never go that route again. Tyvek isn't nylon, it's the same plastic type as used in milk bottles, but it's still synthetic.
@@duponttyvek1757 It says video is unavailable. Do you have a new link for it? Are you the makers of this material? It is amazing! Does it stay waterproof, or does it leak little by little? (if it's breathable, it's to to leak, right?) I use it as a light-weight ground sheet for my tent and love it.
I want to make surgical face masks out of the Tyvek I have to donate to hospitals since they are asking the public to make masks. I was thinking maybe Tyvek, since it is used for hazmat suits, might actually PROTECT medical professionals from coronavirus. What are your thoughts and should they have an added material layor or will the Tyvek do the job on it's own?
I find using skidmarked stained undies work great as a mask.TRhere have been many studies that show most viruses stay well clear of something so nasty.
