MULTIFUNCTIONAL POLYMER FIBROUS MATERIALS FOR FILTERING PURPOSES

摘要

One of the recently emerging techniques of fibrous materials production, melt blowing, consists of forming fibers from substances heated above their melting (crystalline) or glass transition (glass-like) point with further blowing by gas flow. The sprayed fibrous mass is then cooled to solidification either in a gas flow or upon deposition on the forming substrate. Realized from polymers and then ceramics, the melt blowing technique has enriched materials science, engineering, and all commodity products by novel types of fibrous materials and products made from them with a unique combination of properties. The shape stability and strength of melt-blown materials and products are controllable technological parameters that depend on the diameter and the intensity of the adhesive interaction between fibers and the number of contacts between them. The melt blowing technique creates new vistas for controlling the structure and properties of fibrous materials. For example, the fibers can be modified by chemical, physical, and biological methods. Second, the fiber diameter and a uniformity of the adhesion of dispersed components to the fibers can be adjusted to impart new functional properties to the material as a whole. And lastly, the texture of melt-blown materials and products is determined by the kind of relationship and bonding of fibers to one another. This work is devoted to some peculiarities of the melt blowing technique, main characteristics and fields of application of polymer melt-blown materials.