NONWOVEN GEOTEXTLES
Nonwoven polypropylene (PP) geotextiles are made from needle punched polypropylene staple fibre. These fibers are cut, opened, laid onto a web, needled, inspected, tested and rolled. The production technique produces a product described typically as “a nonwoven needle punched geotextile”.
Applications:
- Civil: Roadway Stabilisation/ Separation: Roads and highways are built using geotextile to prevent aggregate from mixing with the subgrade.
- Drainage: Syntex nonwoven geotextiles are ideal for drainage applications. Unlike woven geotextiles (with the exception of monofilament drainage fabrics), polypropylene nonwovens resist clogging. Nonwovens are placed in direct contact with the earth where drainage stone, perforated drain coil, etc may be placed. The nonwoven filters soil and waste while allowing water and leachate to pass.
- Environmental: Geomembrane Protection: Syntex heavy weight nonwoven geotextiles will cushion and protect geomembranes from puncture caused by aggregate and basecourse. Gas Venting: Heavy weight nonwoven geotextiles are used for collection and lateral transmission of liquids and gases that may build up under a geomembrane used in a capping of waste facility.
- Hard Armour Underlay: Syntex nonwoven geotextiles are recommended to help relieve hydrostatic pressure beneath hard armour and prevent soils from migrating to the surface providing an effective erosion control method.
- Weed Control: A good nonwoven can be engineered to resist UV degradation for specific periods from 6 months to over 2 years. The product has proven to be an economical solution for highway embankments where traditional woven weed control fabrics have not provided adequate water flow to actively promote vegetation. Case studies are available. Note, polypropylene provides superior flow (in particular on slopes or in direct contact with earth).