The technological process of melt-blown nonwovens: polymer feeding-melt extrusion-fiber forming-fiber cooling-web forming-reinforced cloth forming.
Melt-blown fabric is mainly polypropylene, and the fiber diameter can reach 1 ~ 5 microns. These superfine fibers with unique capillary structure have many pores, fluffy structure and good wrinkle resistance, which increase the number and surface area of fibers per unit area, thus making melt-blown cloth have good filtering, shielding, heat insulation and oil absorption properties. It can be used in the fields of air, liquid filter materials, isolation materials, absorption materials, mask materials, heat insulation materials, oil absorption materials, wiping cloths and the like.
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Matters needing attention in the use of melt-blown nonwovens;
In the production process of melt-blown nonwovens, the changes of process conditions such as melt temperature, melt pressure, hot air pressure and melt flow rate have an important influence on the mechanical properties of melt-blown polyurethane elastic nonwovens. At the same time, in the production process of high-temperature polymer extrusion, the environmental protection high-temperature melt pressure sensor is adopted to ensure the normal operation of the equipment. However, the filling medium of the traditional high-temperature melt pressure sensor contains harmful filling substances, which will do harm to the finished nonwoven products once it leaks.
Melt-blown nonwovens have smaller diameter, larger surface area, smaller pores and higher porosity than ordinary materials, which is very suitable for the separation of liquid-solid mixture and the filtration of gas-solid mixture.
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