A nanomembrane makes non-woven fabrics worth 50 times

The haze weather that lasts for many days makes people unable to breathe freely. Buying masks and wearing masks to prevent haze has become the norm for many people. But how do many anti-haze masks on the market filter the air? Recently, the reporter walked into a leading talent company in Suzhou, Wujiang High-tech Zone (Shengze Town), and discovered the secret of anti-smog masks blocking airborne particles. 'In fact, the key to the anti-smog function of a mask lies in the filter element in the middle. 'Wei Kai, a PhD in Biofunctional Fiber Engineering who returned from studying in Japan, told reporters,'The quality of the filter element determines the quality of the mask. 'Wei Kai currently develops a new nanomaterial used in masks, which is in the stage of small batch production. As such products are in short supply in the market, Wei Kai is considering increasing production capacity. In the second half of last year, Wei Kai returned to China to set up Suzhou Fuxing Nano Technology Co., Ltd., and in a few months, assembled the first electrospinning nanofiber mass production equipment. In the workshop, Wei Kai pointed to a 1.8-meter-high 'black box' and said that this is all his equipment. The seemingly ordinary non-woven fabric, after being driven by the reel, is sent into the 'black box' for processing, and then sent out and rolled into a reel in a short while. With such a simple production step, there seems to be no special high-tech with the naked eye. The reporter looked in from the surveillance window next to the'black box' and saw the processing of the non-woven fabric. If you look closely, you can see that there is an instrument in the'black box' spraying'water' on the non-woven fabric from bottom to top, and a layer of'film' is formed on the cloth in an instant, and it feels like it has suddenly become solid from a liquid state. When the reporter expressed his curiosity, Wei Kai explained that his high technology is reflected in the nanofiber membrane produced by the 'membrane' electrospinning technology we have seen. Can I filter PM2.5 by attaching a nanomembrane to a non-woven fabric? It turns out that the filaments of nanofiber membranes have the advantages of small pore size and high porosity, which are suitable for air filtration applications. Wei Kai pointed to a test report and explained that the average pore size of this membrane is 10 times smaller than the particle size of PM2.5, which is about 0.25 microns. The filaments that make up the nanofiber membrane can only be observed under a microscope at a magnification of 2000 times, which is about 1/10 the thickness of the hair filament. Therefore, the nano film produced by Fuxing Nano can completely block PM2.5 particles and bacteria like Staphylococcus aureus out of the mask filter. At the same time, the test also showed that despite the compact structure, the air permeability of this film is higher than that of products on the market today. This technology developed by Wei Kai has already applied for a number of invention patents, innovating the same type of domestic filter membrane products, and the technology has reached the international lead. He told reporters that he has laid out a series of intellectual property systems from the production of raw materials, preparation technology, equipment manufacturing and final products. In addition to the production of mask filter elements, this nano-membrane can also be used in products such as air purifier filter membranes, which meets the current market demand and has broad prospects. The 'black box' for the production of nano-membrane is the first equipment in China that can produce filter products with a width of 60 cm, which solves the problem that electrospun nanofibers cannot be produced in large quantities. This seemingly inconspicuous device is said to have obtained multiple international certifications such as SGS quality certification and EU CE certification. Common non-woven materials sold in the market are inexpensive. Wei Kai said that the nanofiber membrane he produced with electrospinning technology can increase the added value of non-woven fabrics by 50 times and greatly enhance the market competitiveness of textile materials. Wei Kai said: 'Innovative enterprises cannot wait for the market, but must be at the forefront of market demand. 'Fuxing Nano has completed sales of 500,000 yuan in the three months since its production. He led the company and has already set his sights on the research and development of other new materials. In the future, they will also produce waterproof and breathable membranes used in the field of outdoor fabrics, and expand their application areas to medical and health, special industrial operation protection and other professional fields. The goal is to be a professional manufacturer of air purification membranes and waterproof and breathable membranes for outdoor fabrics. The leading company in Wujiang uses technology to add more added value to Wujiang’s textile materials.