Needle-punched non-wovens are made from polypropylene fibres that are tangled together by a needle-punching process.
The fibres may be made in continuous or short lengths (the short length
fibres are called staple fibres) and achieve their strength by interlocking.
Needle-punched nonwoven Geosynthetics Geotextiles have excellent water flow rates and are used for filtration of soil fines for drainage applications including trench drains, as a wrapping for perforated pipe, for
erosion protection, and combined with three-dimensional structures to create prefabricated drains.
They are also commonly used with geomembranes to provide a protective cushion. Needle-punched non-woven primary functions: filtration; separation; protection; drainage. Secondary functions: reinforcement.
