According to the composition of non-woven fabrics, there are polyester, polypropylene, nylon, spandex, acrylic, etc.; different compositions will have completely different styles of non-woven fabrics. There are many production processes in the manufacture of non-woven fabrics. Melt-blown non-woven fabrics are the process of melt-blown method. It is one of the non-woven fabric production processes and one of the direct polymer forming methods. The polymer melt extruded by the screw extruder is extremely stretched by high-speed and high-temperature air jet blowing or other means to form extremely fine fibers, which are then gathered on the web-forming drum or the web-forming curtain. A fiber web is formed, and finally strengthened by self-adhesive action to make a melt-blown fiber non-woven fabric.
Melt blown cloth is mainly made of polypropylene, and the fiber diameter can reach 1 to 5 microns. There are many voids, fluffy structure, and good anti-wrinkle ability. These ultra-fine fibers with unique capillary structure increase the number and surface area of fibers per unit area, so that the melt blown cloth has good filtration, shielding, heat insulation and oil absorption. . It can be used in the fields of air, liquid filter materials, isolation materials, absorption materials, mask materials, thermal insulation materials, oil absorption materials and wipe cloths.
The fiber diameter of the meltblown layer is extremely fine, basically about 2 microns (um), so it is only one-tenth of the diameter of the spunbond layer. The thinner the meltblown layer, the more it can block the entry of tiny particles. For example, KN95 mask refers to Under normal circumstances, a flow of 85L can block 95% of the tiny particles (0.3um), which plays a vital role in filtering bacteria and preventing blood penetration, which is why it is called the heart of a mask.
