Mask and preparation method thereof

The invention relates to the technical field of masks, in particular to a mask and a preparation method thereof.The mask comprises an inner layer, a middle layer and an outer layer; the inner layer, the middle layer and the outer layer are all non-woven fabric layers; nano-silver is loaded on the middle layer, and a first protective layer and a second protective layer are sequentially arranged on the surface of the middle layer from inside to outside; the first protective layer is a latticed paraffin layer; and the second protective layer is a vegetable oil film layer. According to the mask, the capability of killing bacteria can be kept for a long time, the service life of the mask is prolonged, the mask has good air permeability, meanwhile, dust and the like can be filtered, and the protection effect of the mask is effectively improved. 本发明涉及口罩技术领域，尤其涉及一种口罩及其制备方法，其中，口罩包括内层、中间层以及外层；所述内层、中间层以及外层都为无纺布层；所述中间层上负载有纳米银，且所述中间层的表面由内至外依次设置有第一防护层和第二防护层；所述第一防护层为网格状的石蜡层；所述第二防护层为植物油膜层。本发明的口罩可长期保持对细菌的灭杀能力，提高了口罩的使用期限，在口罩具有