RV_ Posted January 21, 2022 Report Share Posted January 21, 2022 (edited) Great info with pics and diagrams showing why and how they work. Excerpt: "N95 respirators have long been the best disposable face coverings for protection against airborne viruses, but until recently, they were scarce. When worn properly, N95s can filter out at least 95 percent of particles in the air, including the virus that causes covid-19. Only pricey air-purifying respirators or hazmat suits offer better protection. How N95 masks work N95s come in several shapes and carry a mark from the National Institute for Occupational Safety and Health (NIOSH) to show that they are authentic. Some look like domes, others a bit like duck bills. This flat-fold, three-panel type is popular in hospitals. It is made of polypropylene fibers that are 1/50th the size of a human hair, blown together in a random web to create an obstacle course for particles. Air flows in and out of the microscopic spaces between the fibers, allowing the wearer to breathe." More diagrams of the electrostatic action and explanations for those interested here in he source article: https://www.washingtonpost.com/health/2022/01/20/n95-mask-effectiveness/?utm_campaign=wp_post_most&utm_medium=email&utm_source=newsletter&wpisrc=nl_most&carta-url=https%3A%2F%2Fs2.washingtonpost.com%2Fcar-ln-tr%2F35d1905%2F61eaee179d2fda14d7ffad5e%2F596b1cddade4e24119ade2b6%2F9%2F72%2F61eaee179d2fda14d7ffad5e&fb_news_token=jZPk54mR3mLoKKTborL3qA%3D%3D.5pReY7F3mRxUYJi8YI%2BfqX%2BoKbuJJJD2LifGA9AuCwZgsZXeoFqH2MLxcdFXZz4zykm4SfVPfXsnJOB%2BMqO42C4w4b34EycQOAGx6ee%2FWdAVvh5ViqNaXFe0KmLptPGBvPGMojol7X6HUAeCtcYtrkEOKGAgj8zyofaGm2OwIOFcBqxkJC7qhHR%2B%2Fp%2FbIyKibZUo0n7JMQt213033JnXiZVLeV48K0dIiFAE3BDW9eDsbQtFGEgfndeYp2yB3ktdIkjy9BUezKmZpjTFHLKBzLkfEfEIlNYgo5fOw1yFOw2mSTCwJjq73La47q18SuACWCadkgV9QGuuARRiZ1YYCg%3D%3D Edited January 21, 2022 by RV_ Quote RV/Derekhttp://www.rvroadie.com Email on the bottom of my website page.Retired AF 1971-1998 When you see a worthy man, endeavor to emulate him. When you see an unworthy man, look inside yourself. - Confucius “Those who can make you believe absurdities, can make you commit atrocities.” ... Voltaire Link to comment Share on other sites More sharing options...
Dutch_12078 Posted January 21, 2022 Report Share Posted January 21, 2022 I really think there should be a different designation for medical N95/KN95 masks than for industrial N95/KN95 masks with exhalation vents. The industrial vented masks obviously don't work properly for COVID protection, yet both types are simply labeled "N95" or "KN95". Quote Dutch 2001 GBM Landau 34' Class A F-53 Chassis, Triton V10, TST TPMS 2011 Toyota RAV4 4WD/Remco pump ReadyBrute Elite tow bar/brake system Link to comment Share on other sites More sharing options...
justRich Posted January 22, 2022 Report Share Posted January 22, 2022 The vented KN95 offers superior protection - but probably fails to prevent spread. Quote ~Rich Link to comment Share on other sites More sharing options...
Dutch_12078 Posted January 22, 2022 Report Share Posted January 22, 2022 5 minutes ago, Rich&Sylvia said: The vented KN95 offers superior protection - but probably fails to prevent spread. The vented masks only provide protection to the wearer, not to those around them. They're only intended to protect the wearer from dust and similar particle exposures, not viral contamination that can be spread by the wearer. Quote Dutch 2001 GBM Landau 34' Class A F-53 Chassis, Triton V10, TST TPMS 2011 Toyota RAV4 4WD/Remco pump ReadyBrute Elite tow bar/brake system Link to comment Share on other sites More sharing options...
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