Abstract: This paper presents a new method of producing polypropylene filament geotextiles: select high strength twistless polypropylene filament as raw material; separate the filaments by an electrostatic separator;form a uniform fiber web and then consolidate on needle, punching machine. This paper mainly discusses the influence of the separated filaments on the end product quality. And a series of indexes, i.e., the surface density, thickness, tensile strength, tear strength, bursting strength, vertical permeability and effective pore size of the prepared fabric, are tested and analyzed. Results indicate that all the performance indexes have exceeded the national standard, which have greater application potential than the existing products on market.

Key words: polypropylene filament; geotextiles; process; performance