Environment-friendly air filtration non-woven fabric as well as production process and application thereof

Abstract

The invention provides a production process of an environment-friendly air filtration non-woven fabric, and belongs to the technical field of air filtration. Polypropylene, electret master batch and high-molecular electret are uniformly mixed, the prepared mixture is fed into a screw extruder, melt extrusion is performed through the screw extruder to form a melt, the melt is sprayed out through a spinneret plate to form fibers, the fibers are subjected to constant-temperature and constant-pressure hot air drafting, melt-blown cloth is formed on a web curtain, then infrared radiation heat treatment, high-pressure electret treatment and cooling treatment are sequentially conducted, then rolling is conducted, and the air filtration non-woven fabric is obtained, wherein electret master batches are composed of polypropylene, few-layer graphene nanosheets, an antioxidant, a compatilizer and a nucleating agent; the few-layer graphene nanosheet is prepared by taking magnesium oxide microcrystals with a face-centered cubic structure as a substrate and a template through a chemical vapor deposition method; and the electret master batch improves the electret degree of fibers, improves the storage stability of charges and further improves the filtering performance.

Description

technical field

[0001] The invention relates to the technical field of air filtration, in particular to an environment-friendly air filtration non-woven fabric and its production process and application. Background technique

[0002] Existing studies have shown that particulate matter caused by pollution in the air, especially those with an aerodynamic equivalent of 2.5 microns or less, has a small particle size and is rich in toxic and harmful substances. These particles can stay in the air for a long time and are easily destroyed. People absorb it into the body and cause respiratory diseases, lung injury, cancer, cardiovascular disease, reproductive system, fetal development and other diseases.

[0003] Commonly used fiber filter materials mainly rely on Brownian diffusion, interception, inertial collision, and direct interception to catch dust. The electrostatic adsorption between filter materials and particles is very small, and the filtration efficiency of small particl...

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