The filtering principle of medical face masks

Masks are one of the daily items that people use more in daily life, and everyone is more familiar. However, there are many types of masks. In fact, there are many types of masks. Today, I will introduce the filtering principle of medical face masks. The editor of disposable face masks will give a brief introduction to users. The following is Let's take a look together.

Brownian motion: Because the particle size is too small, it is susceptible to the continuous impact of other gas molecules, causing their motion trajectory to be an irregular Brownian motion. When adsorbed on the fiber surface, the smaller the particle, the stronger the effect; Can not penetrate the space of the fiber, and then directly captured by the fiber surface, the larger the particle size, the better the effect.

Inertia impact Inertia is the continuous nature of particle motion. If the gas and the suspended particles hit the filter cloth or filter material at the same speed, the gas will change its flow direction with the holes in the filter material. Due to inertia, it still maintains the original flow direction, so it hits the filter material to achieve the filtering function. The larger the mass and the faster the particles, the better the filtering effect.

Electrostatic attraction: Because the fiber is charged, it induces extremely fine particles to adsorb on the fiber surface. The smaller the particle size and the lighter the particle, the easier it is to be attracted.

Settling effect: Direct settling caused by the gravity of the particles themselves, which is captured by the filter material; the greater the mass, the more opportunities there are.

When choosing an anti-smog mask, you must look at the implementation standards of the mask, observe the packaging and body of the product, and see if there is a clear recognized implementation standard. Some manufacturers declare that they conform to the standard without passing the standard certification. Pay attention to These problems; when buying, pay attention to the description of the mask packaging to determine whether the material meets which standard; look at the brand of the mask, choose a regular manufacturer and well-known brands, so that there will be protection.

In addition, most medical masks are disposable and cannot be washed and reused after use. If you find that the medical mask has expired, you should also replace it with a new one immediately.