Generally divided into three levels: ordinary level, disinfection level and sterilization level. Ordinary level: unsterilized, and may contain pathogenic substances. Only suitable for dust and particles prevention. Disinfection grade: only pathogenic microorganisms are killed, and other microorganisms are still reproducing, so it is only used in ordinary occasions. Sterilization grade: kill all microorganisms to achieve aseptic state, suitable for medical care and public places.
Related information:
Conventional disposable medical masks or N95 masks are mainly made of meltblown nonwovens, and two thick layers of nonwovens are "welded" by ultrasonic technology. The protective principle of this mask is to capture fine dust and viruses by using the electrostatic effect of melt-blown non-woven fabrics.
However, the protective function of Chen Ju's new mask is not the principle of "electrostatic adsorption", but the filter core material sandwiched in the middle of the mask-nanofiber microporous membrane. Its thickness is less than 3 microns, but it is waterproof, breathable, high in primary filtration performance for particulate matter, environmentally friendly and corrosion-resistant, and can withstand steam at 130℃. At the same time, the outer fabric of the new mask is cotton, which is superior to the non-woven material of disposable medical mask in terms of breathability, softness and comfort. After wearing it for a long time, the mouth will not feel wet and uncomfortable.