High flame retardancy glass fiber air filtering paper and preparation method thereof

The invention discloses a piece of high flame retardancy glass fiber air filtering paper which is prepared from alkali-free glass fiber cotton with the diameter being 7-9 micrometers, alkali-free glass fiber cotton with the diameter being 0.3-0.4 micrometer, and a binding material, wherein the mass ratio of the alkali-free glass fiber cotton with the diameter being 7-9 micrometers to the alkali-free glass fiber cotton with the diameter being 0.3-0.4 micrometer is 1:(3.8-4.2); the binding material is a mixture of acrylic emulsion and a halogen-free organic phosphate fire retardant. The invention further discloses a preparation method of the high flame retardancy glass fiber air filtering paper. The preparation method comprises the following steps of firstly, pulping to disperse the raw materials so as to obtain pulp, subsequently gluing wet paper, removing moisture in the wet paper, and finally drying so as to obtain a product. The glass fiber air filtering paper is smooth and uniform in surface, and good in flame retardant property.