The N95 mask is one of nine particulate protective masks certified by NIOSH (National Institute for Occupational Safety and Health). The N95 mask is not a specific product name. As long as it meets the N95 standard and passes the NIOSH review, it can be called a N95 mask. The N95 mask can be used for particles with an aerodynamic diameter of 0.24 ± 0.6 μm (physical diameter 0.075 μm ± 0.020 μm). The filtration efficiency reaches over 95%.
Medical masks are mostly made of one or more layers of non-woven fabrics. The main production process of medical masks includes meltblown, spunbond, hot air or acupuncture, etc., which is equivalent to resisting liquids, filtering particulates and bacteria, and is a medical protective textile. Medical masks consist of a mask and a tightening strap. Medical masks are divided into inner layer, middle layer and outer layer. The inner layer is ordinary sanitary gauze or non-woven fabric. Non-woven fabric or ultra-thin polypropylene meltblown material layer.
KN95 is a Chinese standard mask. KN95 masks are a type of masks with particle filtering efficiency in China.
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During the epidemic period, it is recommended that you try to choose n95 masks without law to completely isolate the virus. N95 masks without valves directly block the droplets. N95 Mask With Valves are opened when the valve is exhaled and closed when inhaled, so the droplets will fly out during exhalation. If a person with a new coronavirus is wearing a N95 Mask With Valve, the droplets cannot be cut off better.