Jiangyin Kesheng Machinery Co., Ltd. specializes in the production of melt-blown fabric blowers, but the knowledge of melt-blown fabric is layman, therefore, the content of this article is for reference only, so as to avoid misleading parameters, and to return to the truth:
The key to improving the filtration efficiency of masks is the electrostatic storage of melt-blown non-woven fabrics. At the current mask flow rate, the attenuation of static electricity is not enough (such as half a month to the user after leaving the factory), and normal medical masks are all valid. 6 months, and some masks in Japan are valid for three years.
Meltblown nonwoven electrets are very sensitive to environmental humidity. After stored at room temperature and high humidity (relative humidity greater than 95%) for 7 days, the surface potential of the positive and negative corona charging samples has decayed to 28% and 36% of the initial value, respectively. At this time, because the melt-blown non-woven fabric has an open structure, its specific surface area is large, and it has a larger contact surface with the surrounding environment, making it more sensitive to moisture, corrosive gases, and heterogeneous charged particles in the environment. The corona charging system can only generate low beam energy ionic charges, and most of the injected charges are deposited on the near surface layer of the surface fiber of the cloth. When the sample is stored or operated in a high-humidity environment, a large amount of charge is lost due to the compensation effect of the polar groups in the water molecules and the heterogeneous ions in the atmosphere on the high concentration surface charge on the fiber. Therefore, in the process of transportation and storage of meltblown cloth, high humidity environment must be avoided.
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