Preparation Method for Antimicrobial Air Filtration Material

A preparation method for an antimicrobial air filtration material, comprising the following steps:

• S1, feeding low-melting-point fibers into a first cotton-blending opener for opening, adding 2D fibers into a second cotton-blending opener for opening, then conveying the fibers to a cotton-blending box for uniform mixing to obtain mixed fibers, and conveying the mixed fibers to a carding machine for carding:
• S2, conveying the carded mixed fibers to a lapping machine to form a fiber web, the fiber web consisting of 4-6 layers and having a gram weight of 0.03-0.06 kg/m2;
• S3, conveying the fiber web to a hot-pressing roller for thermal pressing and shaping to form a filtration base cloth, a roller surface temperature of the hot-pressing roller being 200-300° C.;
• S4, introducing the filtration base cloth onto a spraying shaft of a melt-blown line in an inverted C-shaped form;
• S5, mixing polypropylene particles and a silver ion antimicrobial agent in a mass ratio of 100:(1-5), putting the mixture into a heating bin, heating to 180-230° C. for melt blowing, so that the melt-blown polypropylene fibers adhere to an outer surface of the filtration base cloth to form a PP melt-blown layer, and conducting drafting, netting, reinforcing or self-bonding to obtain an air filtration cloth with a dual-layer structure consisting of a fluffy upper layer and a dense lower layer;
• S6, spraying an antimicrobial viscose solution at high pressure on the PP melt-blown layer of the air filtration cloth, a spraying amount of the antimicrobial viscose solution being 1%-2% of the gram weight of the air filtration cloth;
• and
• S7, conveying the air filtration cloth to a drying device for drying and shaping, trimming and rolling to obtain the antimicrobial air filtration material.