JLS-Electret masterbatch is a functional material of melt blown non-woven fabric with electrostatic effect, piezoelectric effect and pyroelectric effect. The propose of electret is to make the melt blown non-woven fabric store static electricity, so that it can absorb dust, bacteria, viruses, aerosols and other harmful substances in the positively charged air, thereby improving the filtration efficiency of the melt blown non-woven fabric( over 95%-99%).