Among them, medical protective masks (N95/KN95 masks) and medical surgical masks are medical products that have obtained national regulatory management after SARS in 2003, and have the function of blocking the passage of liquid and droplet particles. If worn correctly, it can effectively prevent diseases spread by droplets, and is our first choice for masks. They are usually made of multiple layers of non woven fabrics.
The mask is a multi-layer composite structure. The N95/KN95 mask is composed of the innermost and outermost non woven fabric layer, the middle electrostatic layer and the meltblown non woven fabric layer. The medical surgical mask is composed of the non woven fabric layer and the meltblown non woven fabric layer. In addition to supporting the mask, the non woven fabric layer also functions as a part of the screen, and particles with a large particle size will be blocked by them. Meltblown non woven fabric has a superfine fiber structure, has good filterability, and can intercept medium-sized particles. The electrostatic layer plays the role of electrostatic adsorption, especially small particles are light and will be adsorbed.
So what kind of non woven mask is a good mask?
The larger the particles, the better the filtering effect, the smaller the particles, the better the adsorption effect, and the medium-sized particles are the most likely to slip through the net. According to a large number of experiments, the particle size ranges from 0.2 to 0.8 microns. Therefore, in GB2626-2006 "Respiratory Protective Equipment-Self-priming Filter Type Anti-Particulate Respirator", the detection of leakage requires that the particle size be between 0.02 microns and 2 microns, and the median is 0.3 and 0.6 microns.
It should be noted that although medical protective masks with high protection levels have better protective effects, due to the high level of filter material, good adhesion, and higher respiratory resistance, wearing them for a long time will increase the respiratory burden and cause breathing difficulties and other discomforts.
If it is only for daily use and does not go to a place where the risk of pathogen infection is high, such as a hospital, you can choose a medical surgical mask.
Here, Foshan Guide Textile Co., Ltd. reminds friends that you must wear a good mask when you go out, keep ventilation indoors, and develop good hygiene habits. In addition, customers who have non woven fabric needs are welcome to contact us, and we will serve you wholeheartedly!
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