How do medical masks protect against viruses?

  • Connexions
  • Wed, 01 Dec 2021 14:07:25 GMT
  • 301

Disposable medical masks have high requirements for equipment, production environment and personnel. Like the automobile industry, mobile phone industry, there are also a lot of links are completed in a dust-free environment. Therefore, there is enough technical support for the transformation of dust-free workshop. The main material for the production of non-woven polypropylene is mainly provided by China Petroleum and Sinopec, so it has sufficient advantages in terms of raw materials. Therefore, from the above, the enterprises that switch to masks have certain advantages.

Production process of disposable medical masks

With raw materials and equipment, the production of masks is much easier. Melt-blown cloth and non-woven cloth are divided into small rolls and put on the production line first. First, three layers of non-woven cloth materials are stacked together to make the main body of masks by high-frequency welding.

Structure and material of disposable medical masks

General medical masks are composed of three layers, the inner and outer layers are spunbonded non-woven fabric, sandwiched between a layer of melt-blown non-woven fabric. The outer non-woven fabric can prevent droplet, the inner non-woven fabric can absorb moisture, and the middle layer is a filter layer, the effect of filtering bacteria can reach 99.99%. Some of the larger particles can be removed by a mechanical sieve for filtering materials, just as we use a sieve to remove larger materials. Some of the particles hit the fibers as they pass through the network of channels of the filtering material and are adsorbed by molecular gravity. In addition, some particles moving at small scale and low speed are absorbed by the fiber during Brownian diffusion. In addition, the electrostatic action of the fiber also attracts particles. This is why medical masks are better than ordinary masks for preventing germs. Back to the structure, we can find that the main material of medical masks is non-woven fabric.

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