Naturally degradable nanofiber environment-friendly mask

Abstract

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.

Description

technical field [0001] The invention relates to an environmentally friendly mask which can be completely degraded in the natural environment, belonging to the field of air filtration. Background technique [0002] Masks are important materials for the prevention of respiratory infectious diseases, smog protection, toxic gas protection and industrial dust protection, and consume a lot. Existing mouth mask mainly adopts polypropylene material. The inner and outer layers of the mask are spunbonded polypropylene fiber membranes, which mainly play a supporting role; the middle layer is a melt-blown polypropylene fiber membrane treated with electret charging, which mainly plays a barrier role. Polypropylene material is smelted from petrochemical industry. Below 80°C, it has strong acid and alkali resistance and bacterial corrosion resistance. It takes a long time to naturally degrade in the atmospheric environment. The main material of "white pollution" that has attracted worldw...

AI Technical Summary

Problems solved by technology

On the other hand, masks are personal protection products with high fluidity and dispersion. Centralized recycling and incineration is not only costly but also difficult to implement

Therefore, a large number of discarded polypropylene masks are bound to cause serious damage to the environment

[0003] Aiming at the problem that traditional waste masks are likely to cause environmental pollution, the present invention proposes a naturally degradable nanofiber environmental protection mask

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