The wide range of geotextiles which are commercially available is due to the differences between the raw materials used, types of yarns and manufacturing method of the final product.

In general, each manufacturer produces either a single type of geotextile (available in different thicknesses or mass per unit area) or a variety of types of geotextiles that each is intended for a specific application.

The raw materials (polymers) used for the manufacture of geotextiles are polypropylene (most common), polyester, polyamide (nylon) and polyethylene.

The Role of Non-Woven Geotextiles

- Protection
The tensile resistance of geotextiles in combination with their impact and puncture resistances, contribute to the absorption of the various stresses that develop during constructions. Geotextiles protect sensitive materials from damages and deterioration and enhance the conservation of the rigity of the structure.

- Separation
Although the geotextiles are permeable, the pore opening size is maintained sufficiently small, so as to create an effective barrier between the different soil layer types and to prevent their mixing.

- Filtration
The structure of geotextiles allows the unhindered passage of water through their mass, while retaining fine soil materials. The specific structure prevents contamination of granular filters.

- Drainage
The structure of needle punched non woven geotextiles ensures flow through the mass, both horizontally and transverse (transmissivity, permittivity), to effective drain constructions.