A sudden epidemic ravaged China, and a defense battle without gunpowder started in the land of China. Medical protective clothing was the last barrier for angels in white to fight the virus.

Common fabrics cannot effectively isolate ordinary fabrics. Viruses cannot be effectively isolated. Even the tightly wrapped silk can't isolate the virus. Because textiles are tightly interwoven between threads. However, this also results in that there are gaps between the lines and between the fibers and between the fibers that cannot be seen by the human eye. The virus can easily pass through because the diameter of the virus is only about 100 nanometers, which means that the viruses are closely packed together. It also takes at least 100,000 human eyes to barely observe. At the same time, traditional fabrics have a poor barrier to liquids. For example, the Ebola virus transmitted through body fluids and blood can easily infiltrate the traditional fabrics with liquid and contact the fragile mucosal skin. Virus protection This is undoubtedly a huge challenge for textile materials. How to effectively isolate the disposable medical protective clothing currently worn by medical personnel, mostly made of non-woven composite materials, is made of multilayer composite materials. In the case of medical protective clothing with SMMS structure, S is a spun-bond non-woven fabric and M is a melt-blown nonwoven fabric.

S spun-bond non-woven fabric: mostly composed of polyester and polypropylene filaments, high linear density, and regular network, which can provide good mechanical strength for "medical protective clothing" while filtering large particles. This ensures that medical staff will not tear during high-intensity work and avoids being exposed to the source of infection. The breaking strength is not less than 40N, and the elongation at break is not less than 15%. M melt-blown non-woven fabric: mostly composed of ultra-fine polypropylene fibers, these fibers have a small diameter, a large specific surface area, and are fluffy and soft. At the same time, a high-voltage electrostatic treatment was used in the manufacturing process to make the fiber have an electrostatic adsorption function, thereby further blocking virus aerosol pollution. It can filter no less than 70% of 3 micron non-oily particles. The combination of two different textiles makes each other complement each other and complement each other. The original medical protective clothing filtered better in dry conditions, and the protective effect against viruses was only about 40% under wet conditions. The permeability of medical protective clothing prevents blood and body fluids with viruses from penetrating into the clothing. The impermeability to water is not lower than 1.67kPa, and the penetration resistance to synthetic plasma is greater than 1.75kPa. Comfort requirements Because the key to regulating body temperature is through sweating, the sweat of comfortable clothes can be vaporized out of the clothes. And the protective clothing finishing through the above can not only prevent the penetration of liquid but also allow the weaker polarized vaporized sweat to penetrate the gaps in the fiber to exclude the protective clothing, thereby ensuring the comfort of the protective clothing. The moisture permeability is not less than 2500g / (m2 · d).

For reusable medical protective clothing, a PU polyurethane coating is used. The surface of the fabric is closed by a coating agent and gas permeability resistance. The hydrophilic groups in the coating or a microporous structure formed by special methods ensure the fabric's moisture permeability. Modern medical protective clothing can still provide a certain degree of comfort while ensuring effective isolation of the virus, so as to ensure that medical staff can work for a longer period of time.