Meltblown Cloth Electret Raw Materials

Tourmaline powder can be made into melt blown non-woven fabric by melt blown method, and charged into electret by electrostatic generator under 5-10kv high voltage, which can improve the efficiency of fiber filtration. Because tourmaline has the function of releasing negative ions, it is also antibacterial. In fact, the filtration performance of melt blown nonwovens is less than 70%. It is not enough to rely solely on the mechanical blocking effect of the three-dimensional fiber aggregate with fine fiber, small void and high porosity. Otherwise, increasing the weight and thickness of the material will greatly increase the filtration resistance. Therefore, the electrostatic charge effect is generally added to the melt blown filter cloth by electrostatic electret process, and the filtering efficiency can be improved by electrostatic method, which can reach 99.9% to 99.99%. That is to say, kn95 or above. In the process of melt blown electrostatic electret, tourmaline powder, silicon dioxide, zirconium phosphate and other inorganic materials are added into PP polypropylene polymer in advance, and then one or more groups of corona discharge with needle electrode voltage of 35-50kv of electrostatic generator are used to charge the melt blown material before rolling. When high voltage is applied, the air under the needle tip will generate corona ionization, partial breakdown discharge and carrier pass Under the action of electric field, some carriers will be trapped in the surface layer and become electret filter materials.