Why Are Face Masks Disposable

The mechanism of action of disposable masks is in line with the objective phenomenon of filtration. First of all, physical interception is that the radial or specific angular size of particles cannot be intercepted by the filter layer of the mask (disposable masks are mostly non-woven fabrics). Second, the Brownian motion (random irregular motion) of the particles due to the more obvious interaction force at the microscopic level will cause a part of the particles to collide with the filter layer and be intercepted and adsorbed when passing through the filter layer. Third, electrostatic adsorption at the particle level will also be more pronounced, so if the filter layer is charged, this will greatly improve the ability to adsorb particles. All of the above effects will cause particles to be stacked at the filter layer to form a filter cake to improve the interception ability, but also cause negative effects such as poor breathing. Taking the disposable mask as an example to continue to explain, cleaning the disposable mask will destroy the filter layer structure and the electrification. Therefore, disposable masks need to be replaced in time. In a word, because the interception degree of particles is not only determined by whether the particle size can pass through the mask, so the electret is electret, and the disposable mask with small gap can pass the filtration test stipulated by the state, and can also imitate the haze. I hope It can save you the trouble of choosing.