At present, melt-spray non-woven fabric has been widely used in the field of filter materials. Since the 1970s, various kinds of charging technology and electrification technology by mixing different fibers have been developed and utilized

To multifarious, static cylindrical pole technology now have electrostatic spinning method corona charging method triboelectrification method hot polarization method low-energy electron beam bombardment play water injection method, etc, due to the electrostatic in very different material, the formation of the electret properties are very different, there are differences between the filtering performance and electrostatic persistence is well known, melt-blown fabric, with the increase of storage time on the surface of the magnet material, electrostatic potential attenuation, when at the material surface under different charging voltage electrostatic attenuation trend is the same, retention rate were similar, and in 30 days or so to stabilize Suggesting that polypropylene melt-blown cloth have good static performance, the greater the charging voltage, the electric field intensity, the greater the electrostatic potential on the surface of the material, but cannot exceed a certain limit, if charging voltage exceeds 10 kv, spark discharge will occur and thus resulted in the breakdown of material, so should be careful to choose charging voltage at present in terms of the electrostatic properties of electret, corona discharge method is better static in; Thermal polarization method is also a good electrostatic electret method when the environment is relatively stable. The friction electrification method should be further improved in the test. Electrostatic spinning requires further development of science and technology. Low energy electron beam bombardment method needs to improve and simplify the process of electrostatic electret

With the decline of the market, the pure water injection and melting spraying method has also come into people's view. The water stationary spraying cloth is that the prepared pure water is transferred to the nozzle through the high-pressure water pump, and then the fan-shaped nozzle is used to spray the melting spraying cloth. 2. The performance of water standing pole melting spraying cloth is static electricity saturation, and static electricity standing time is long! The water column molten spray technology originally comes from the United States. At present, many domestic manufacturers are studying the water column molten spray, the effect is better, but the corresponding investment is also relatively large, but it is always inseparable from a purpose: to make high-quality qualified materials! Whether it is traditional corona melting spraying cloth or water stationary melting spraying cloth, or nano melting spraying cloth, there are enterprises to make good quality, there are enterprises to make poor quality! Good or bad products cannot be judged by conventional eyesight