The virus does not exist alone, but in droplets and aerosol droplet cores. Masks, gas masks, and protective clothing have a filtering effect, which is the middle filter layer-meltblown non-woven fabric.
Meltblown Cloth Mask are mainly used for filtering micron-sized particles such as dust, microorganisms, and haze. The random distribution of polypropylene ultrafine fibers sticks together, and the appearance is white, flat, and soft. The material fiber fineness is 0.5-1.0 microns. The random distribution of the fibers provides more opportunities for thermal bonding between the fibers, thus making meltblown. The gas filter material has a larger specific surface area and a higher porosity (≥75%). After high voltage electret electrostatic treatment, it has the characteristics of low resistance, high efficiency and high dust holding capacity.
Meltblown Cloth Mask are a kind of non-woven fabric with static electricity. Meltblown is a conventional manufacturing method of micron and nanofibers. The polypropylene polymer solution is extruded by ultra-fine polypropylene short fibers with a diameter of 0.5-1.0 microns by high-speed small nozzles.
Meltblown Cloth Mask have a unique dense fine denier fiber structure, which increases the number and surface area of fibers per unit area, and the voids are extremely fine. Through high-voltage electret electrostatic treatment, the fiber has an electrostatic adsorption capacity, which has good air filterability.
The filtering effect of meltblown non-woven fabric is a "smile curve". Both small particles and large particles are easily filtered. Nano-sized non-oily particles with a diameter of less than 0.1 micron can be electrostatically adsorbed, and the filtering effect is up to 99%. Particles larger than 10 microns in diameter can be absorbed by the physical structure of the interwoven yarns, and even the worst gauze masks can achieve protection rates close to 80%.
The most difficult to filter is particulates in the 0.3 micron diameter range. Therefore, the detection standard for masks in China uses 0.3 micron sodium chloride particles as the detection index. Meltblown non-woven fabrics with a thickness of less than 0.1 mm can filter sodium chloride particles of 0.3 microns in greater than 70%.
The virus exists in droplet and aerosol droplet nuclei, 82% of which have a diameter in the range of 0.74 to 2.12 microns. Therefore, Meltblown Cloth Mask become core materials such as masks and HEPA filters, which can effectively prevent viruses and play an irreplaceable role in the medical and health fields.
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