The difference between medical mask meltblown cloth and civil mask meltblown cloth

The melt-blown material is made of hot-melted self-fibers, and the thicker thickness of the non-woven fabric is produced by the melt-blown method. The fibers are randomly arranged with the interlayer, forming a multi-bend channel structure of the melt-blown material.

The filtering mechanism of medical masks is Brownian diffusion, entrapment, inertial collision, gravity settling and electrostatic adsorption. The first four are physical factors, that is, the characteristics of the non-woven fabric produced by the melt-blown method, the filterability is about 35%; this is not up to the requirements of medical masks, we need to perform electret treatment on the material to make the fiber Charge it and use static electricity to capture the aerosol where the new coronavirus is located. Electret treatment, electrostatic adsorption is the capture of new coronavirus droplets (aerosols) through the Coulomb force of charged fibers. The principle is to make the surface of the filter material wider, the ability to capture particles can be grabbed, and the charge density increases, the adsorption and polarization effects of the particles are stronger, so the filter layer of the melt-blown non-woven filter material must pass through Extreme treatment can achieve 95% filterability without changing breathing resistance, and can effectively prevent viruses.