Modification treatment method for non-thermoplastic chemical fiber filtration material before film covering

The present invention discloses a modification treatment method for a non-thermoplastic chemical fiber filtration material before film covering. The modification treatment method comprises modification preparation and dipping or spray-coating treatment, and specifically comprises: uniformly stirring a PTFE dispersion, a stabilizer, a penetrating agent and water according to a certain ratio to obtain a non-thermoplastic chemical fiber filtration material before-film-covering modification agent; and permeating the modification agent into the surface layer of a filtration material through dipping or spray-coating equipment, drying, carrying out high temperature sintering to finally form a uniformly-dispersed PTFE particle dispersing layer on the surface layer of the filtration material so as to complete the modification treatment of the non-thermoplastic chemical fiber filtration material before film covering. After the non-thermoplastic chemical fiber filtration material treated by the method is subjected to a