The melt blown cloth is the core material of the mask. The main material of the melt blown cloth is polypropylene. The diameter of the fiber can reach 1-5 microns. There are many voids, fluffy structure and good anti wrinkle ability. The superfine fiber with unique capillary structure increases the number and surface area of fibers per unit area, so that the melt blown cloth has good filtration, shielding, heat insulation and oil absorption. It can be used in the fields of air, liquid filter material, isolation material, absorption material, mask material, heat preservation material, oil absorption material and wiping cloth.