The present invention relates to the field of geotextiles and discloses a flame-retardant, impermeable geotextile and its preparation method. The preparation method for the flame-retardant, impermeable geotextile comprises the following steps: Step 1: Compound flame-retardant modified polypropylene fibers, plantain fibers, polyimide fibers, hydrophobic modified phosphogypsum, antioxidants, barium stearate, adhesive powder, and date palm powder in a reciprocating compounding extruder to obtain a mixed material; Step 2: Extruding the mixed material through a twin-screw extruder, filtering it via a melt filter, then spinning it using a melt spinning machine. The spun filaments are uniformly laid onto the web forming machine's web forming screen. After reciprocating laying by the inclined screen, the web is consolidated using a needle punching machine to obtain a geotextile blank. Step: Microcrystalline wax is deposited onto the surface of the geotextile blank via thermal evaporation, yielding a flame-retardant, impermeable geotextile. The geotextile of the present invention exhibits excellent flame-retardant properties, impermeability, mechanical properties, and oxidation resistance.
Country Code: CN
Application Number: CN202310299540.3
