How does waterproof SMS nonwoven fabric effectively protect against virus invasion?

In the field of medical protection, waterproof SMS nonwoven anti-virus three-level isolation gowns have a vital mission, and their core anti-virus mechanism has attracted much attention. In particular, the meltblown nonwoven layer in SMS nonwoven fabric is like a precise and efficient filter, which plays a decisive role in blocking the spread of viruses.

The waterproof SMS nonwoven anti-virus three-level isolation gown consists of a three-layer structure, of which the outer and inner layers are spunbond nonwoven fabrics, and the middle layer is the key meltblown nonwoven fabric. The spunbond nonwoven fabric has a tough texture, which gives the isolation gown good tensile and wear resistance, ensuring that the overall structure of the isolation gown is stable and not easy to break in daily use and various complex environments. As the core of the entire protection system, the unique physical properties and microstructure of meltblown nonwoven fabrics make it a solid barrier against viruses.

The fiber diameter of meltblown nonwoven fabrics is extremely fine, usually in the micron range. During the production process, these extremely fine fibers are interwoven through special processes to form an intricate and extremely fine pore structure. This structure looks loose, but it actually hides a mystery. When carriers such as droplets or aerosols containing viruses approach the isolation gown, the meltblown nonwoven layer begins to work its magic.

From the perspective of physics, droplets and aerosols are essentially tiny particles suspended in the air. Droplets are relatively large, with diameters generally ranging from 5 microns to 1000 microns, while aerosols are even smaller, with particle sizes usually less than 5 microns. The pore size of meltblown nonwovens is precisely controlled, and most pore diameters are significantly smaller than the particle size of droplets and aerosols. When droplets or aerosols come into contact with the surface of meltblown nonwovens, they first face physical interception. Larger droplets cannot pass directly because their size is much larger than the pores, and can only attach to the fiber surface. As for smaller aerosols, although their particle size may be close to or smaller than some pores, due to the irregular arrangement of meltblown nonwoven fibers and the tortuosity of pores, aerosol particles will frequently collide with fibers when trying to pass through. This collision causes aerosol particles to deviate from their original linear motion trajectory, increasing their residence time and contact probability between fibers. After multiple collisions, aerosol particles will eventually be captured by the fibers, thereby achieving effective filtration of droplets and aerosols.

From the perspective of the transmission characteristics of the virus, the virus itself cannot survive and spread independently in the air for a long time, and must be attached to carriers such as droplets or aerosols. The waterproof SMS nonwoven anti-virus three-level isolation gown fundamentally cuts off the virus transmission route by efficiently filtering these carriers. When medical staff wear the isolation gown in a high-risk environment for the virus, the droplets and aerosols containing the virus from the outside world are intercepted by the meltblown nonwoven fabric layer by layer after contacting the isolation gown, and cannot penetrate into the isolation gown, thereby avoiding direct contact between medical staff and the virus.

In actual application scenarios, whether in the fever clinic of the hospital, where a large number of fever patients may carry unknown viruses, or in the infectious disease ward, where the droplets and aerosols discharged by confirmed patients contain high concentrations of viruses, the waterproof SMS non-woven anti-virus three-level isolation gown can play a stable and reliable protective role. When medical staff perform various medical operations, such as collecting throat swabs, examining and treating patients, the isolation gown always protects them from the invasion of viruses. Even in the long-term working process, facing the impact of a large number of droplets and aerosols, the meltblown non-woven fabric layer can still maintain good filtration performance and continue to provide safety protection for medical staff.

The meltblown non-woven fabric layer in the waterproof SMS non-woven anti-virus three-level isolation gown, with its unique microstructure and physical properties, can efficiently filter droplets and aerosols containing viruses through various mechanisms such as physical interception and collision capture, and build a solid anti-virus barrier for medical staff, playing an irreplaceable and key role in medical protection work.