The invention discloses a naturally degradable
nanofiber environment-friendly
mask. The
mask is composed of a core filter layer with a micro-nano gradient structure and
mask accessory parts, wherein the core filter layer of the micro-nano gradient structure sequentially comprises an inner filter layer, a middle filter layer and an outer support layer from the inside out, the mask accessory parts comprise ear bands and a
nose clip; wherein the average
fiber diameter of the inner filter layer is 100-500nm, the
gram weight of the inner filter layer is 0.05-5g / m<2>, the average
fiber diameter of the middle filter layer is 600-900nm, the
gram weight of the middle filter layer is 0.1-25g / m<2>, the
fiber diameter of the outer support layer is 1-10microm, and the
gram weight of the outer support layer is 5-30g / m<2>. All the materials for manufacturing the mask are degradable and green and environment-friendly materials; the mask is of a multi-layer
composite structure, the core filter layer iscomposed of a micro-
nanofiber membrane with a gradient structure, and the support layer is composed of degradable fiber of tens of microns. The core filter layer with the micro-nano gradient structure is prepared by adopting the
electrospinning technology, in-situ polarization of
polymer molecules can be realized, and the electrostatic
retention capacity of the core filter layer is improved.