How to store the meltblown non-woven fabric to ensure the best filtration efficiency?
Melt-blown non-woven fabric is the core filter material of masks, which is mainly determined by the filtering mechanism of the melt-blown filter material, which is mainly divided into mechanical barrier and electrostatic adsorption. 1. Mechanical barrier Mechanical barrier has the following situations: a. Droplets with a particle size greater than 5um in the air can be blocked by the filter material. b. When the diameter of the dust is less than 3um, the dust is mechanically intercepted by the fiber layer of the curved channel in the filter material of the mask. c. When the particle size and air velocity are both large, the particles will be captured due to inertia collision with the fiber. When the particle is small and the flow velocity is low, the particles will be captured by impacting on the fiber due to Brownian motion. 2. Electrostatic adsorption Usually during the production process of meltblown cloth, electret treatment is used to make the non-woven cloth carry more stati...