Why Do Disposable Respirators Have a Defined Shelf Life?
https://workersafety.3m.com/why-do-disposable-respirators-have-a-defined-shelf-life/
ST. PAUL, Minn. – If you’re responsible for managing inventories of personal protection equipment, you should be aware that most disposable respirators – used to protect wearers against particulate airborne hazards – have a limited shelf life, after which they should no longer be used.
But what does it mean for a respirator to “expire?” Let’s find out.
Disposable respirators can help reduce exposures to potentially harmful substances, such as various particulate hazards. The specially designed filter media traps particulates that pass through when the wearer inhales air. A good fit on the face is critical, since a proper seal helps keep outside air from leaking around the edges of the respirator. ---CONTINUED at LINK, above---