Development Of Nonwoven Filter Materials

Filter materials play an important role in daily production and life. The filtration of gases and liquids is involved in many industrial production and environmental protection devices, and the core of the filtration device is the filter medium. Textile materials as filter media can be widely used in the filtration of gases, liquids, food manufacturing and other industrial production. Filtration textiles are mainly organic woven fabrics, knitted fabrics and nonwoven fabrics. The random distribution of fibers in the nonwoven filter material makes the carrier phase flow through the fiber labyrinth of the filter material.

The system can enhance the dispersion effect, so that the particle suspension phase to be separated has more opportunities to collide and adhere to the single fiber. Because the fibers of woven and knitted fabrics form regularly arranged yarns, the yarns are closely intertwined with each other, and the fibers lack the possibility of forming a labyrinthine system. Therefore, the filtration efficiency of non woven fabrics is significantly higher than that of woven fabrics and knitted fabrics, and it can also increase the flow rate of the carrier phase, that is, to speed up the filtration process. If the filter material structure adopts a density gradient, the effect is particularly significant.

Due to the diversity of Non Woven Fabric Roll processing methods, a better fiber labyrinth system can be formed according to the specific use and needs of the filter material, especially the pore size and porosity of the filter material can be arbitrarily designed to make the production of the filter material more reasonable and economical. In recent years, the expansion of Non Woven Filter Fabric into the field of filtration is very significant, such as air filters used in household air conditioners, ventilation fans, dust collectors, etc., liquid filters such as coffee and tea, in energy stations, petrochemicals, sewage treatment, chemicals and cosmetics. There are also a large number of applications in production, cigarette production, and the automotive industry. In addition, it is also widely used in paper industry and textile production, such as filtration of molten and solution polymer impurities in chemical fiber production.