Non-woven fabric has no warp and weft lines, making cutting and sewing extremely convenient. It is also lightweight and easy to shape, making it beloved by handicraft enthusiasts. So what is melt-blown non-woven fabric? How is it used in making masks?
Melt-blown non-woven fabric is a commonly used material in the production of high-quality masks. Melt-blown non-woven fabric is mainly made of polypropylene, with fiber diameters ranging from 1 to 5 microns. It has many gaps and is therefore relatively fluffy, with good wrinkle resistance. These ultrafine fibers have a unique capillary structure, which increases the fiber count and surface area per unit area, giving melt-blown fabric excellent filtering, shielding, insulation, and oil-absorbing properties. It can be used in areas such as air and liquid filtration materials, isolation materials, water-absorbing materials, shielding materials, insulation materials, oil-absorbing materials, and wiping cloths.
Melt-blown non-woven fabric is mainly made of polypropylene. The polymer melt extruded from the die head orifice is drawn by a high-speed hot air flow, forming ultrafine fibers which are collected on a condensing net curtain or roller and self-adhering into melt-blown non-woven fabric. Melt-blown non-woven fabric has a clean, flat, and soft appearance, and the raw fiber diameter is 0.5 to 1.0 μm. The random distribution of the fibers provides more opportunities for thermal bonding between fibers, making the melt-blown gas filter material have a larger surface area-to-volume ratio and a higher porosity (≥ 75%). With high-pressure electrostatic filter efficiency, the product has the characteristics of low resistance, high efficiency, and high dust holding capacity.
Filtering is the process of separating particles dispersed in gas or liquid. Meltblown nonwoven fabric has the characteristics of fine fibers, multiple pores, and small pore size, and is applied in the field of gas filtration. Gas filtration: medical masks, indoor air conditioning filter materials, filtering media, etc. To improve the filtering effect, the fiber diameter can be reduced, and the density of the filtering material can be increased, but this will increase the permeability resistance significantly. The melt-blown non-woven material is statically charged after being processed horizontally, which can improve the filtering effect through electrostatic effects. Melt-blown non-woven fabric has the advantages of high filtering effect and low filtering resistance after smooth processing, because it has persistent static electricity and can capture small dust particles through electrostatic effects. So, how safe is it to use melt-blown fabric for masks?
Melt-blown non-woven fabric is considered safe for commercial production of masks. However, there are differences in quality for melt-blown non-woven fabric. The melt-blown technology commonly used for masks has a bacterial filtration efficiency of greater than or equal to 95% and greater than or equal to 99%. Masks only cut off the transmission carriers of viruses, such as droplets, saliva, and aerosols, as long as they meet these two criteria, masks are safe.