N95口罩發明人Dr. Peter Tsai：教你如何重複使用口罩

這麽棒的發明人，看不到多少宣傳，可惜。

下麵的鏈接裏還有自製口罩的方法：

• Dr. Amanda Deskins, DO contacted Dr. Peter Tsai, MD, the INVENTOR of the filtration fabric in the N95 mask (JAMA Network from March 23rd, 2020) N95 masks are made of polypropylene material and are designed to tightly fit over your face with little leakage around the edge of the mask. She asked Dr. Tsai about reusing the N95 respirator, and what materials could be added in homemade masks to make them more effective. He responded with the following:
• MASK REUSE METHOD #1
  • When reusing N95 masks, leave a used respirator in dry, atmosphere air for 3-4 days to dry it out. Polypropylene in N95 masks is hydrophobic and contains zero moisture. COVID-19 needs a host to surviveit can survive on a metal surface for up to 48 hours, on plastic for 72 hours, and on cardboard for 24 hours. When the respirator is dry in 3-4 days, the virus will not have survived.
    • Take four N95 masks, and number them (#1-4).
    • On day 1, use mask #1, then let it dry it out for 3-4 days.
    • On day 2, use mask #2, then let it dry out for 3-4 days.
    • Same for day 3, and day 4
• MASK REUSE METHOD #2
  • You can also sterilize the N95 mask by hanging it in the oven (Not a home oven) without contacting metal at 70C (158F) for 30 minutesit is reported that COVID-19 cannot survive at 65C (149F) for 30 minutes.
  • Use a wood clip to hang the respirator in the kitchen oven to do the sterilization.
  • When sterilizing N95 masks, be wary of using UV lightkeep N95 masks away from UV light / sunlight. N95 masks are degraded by UV light because it damages the electrostatic charges in the polypropylene material. It is unclear how long the masks can be exposed to UV light before they are ineffective.
• TIPS FOR REUSE METHOD #1 AND METHOD #2
  • DO NOT place the respirator on a metal surface, or too close to metalthe temperature on the metal surface is higher than the air temperature.
  • Keep N95 masks away from UV light / sunlight.
  • When removing the mask, hold the edge of the straps attached to take off the N95 mask. Your hands may be contaminated at this timedont touch the inside part of the respirator. Wash your hands with soap for 20 seconds afterward.
  • https://rebelem.com/covid-19-prevention/
• 田納西大學的報道：
• https://utrf.tennessee.edu/ut-researchers-nonwoven-fabrics-protect-the-health-of-more-than-a-billion-people/
•  

所有跟帖： 

• “Keep N95 masks away from UV light / sunlight.”，即，在陽光明媚的戶外，很快失效 -fuz- ♂ (0 bytes) () 04/01/2020 postreply 03:36:07

• 扯談 -flowmind- ♂ (0 bytes) () 04/01/2020 postreply 17:45:36

• 我估計在日光下一個月以上才會失效。當然自然幹燥法更省事。另外一般烤箱的最低溫度是170F，加熱到這個溫度關了放半小時就可以了。 -solo1- ♂ (0 bytes) () 04/01/2020 postreply 07:03:25