Manufacturing process of geotextiles

We have also seen new products appear that combine materials and are manufactured using the methods already mentioned, or combined with other geosynthetic products. These new multilayer products are generally grouped together as composite geotextiles. 

Polyethylene and polyamides (eg, nylon) are also sometimes used to manufacture geotextiles. Although they are often used to manufacture geomembranes, the lack of supply of polyethylene fibres makes them a rarely used solution in the field of geotextiles. Nylon has less resistance to acids and aging and is therefore less appropriate for use in natural environments. Nylon is often used for knitted socks covering perforated drainage pipes. 

For some applications such as erosion control, natural fibre—based geotextiles are used. These products can be used when degradability is required or where environmental requirements are high. You can find more information about this type of product in the following chapter Geotextiles Made From Natural Fibers.  

The dimension of the fibre, yam or filament has a direct impact on the mechanical and hydraulic properties of the geotextile. Fibre dimension is expressed according to its diameter, described in deniers or dtex, depending on the measuring system used (American or International System). Thread dimension is generally defined by its yam density. In the case of nonwoven geotextiles made from short staple fibres, fibre dimension is completed by the length of the cut fibres. 

Polypropylene Excellent Excellent Not Low Good Good Softens at 

---

Type of fiber The principal types of fibers used to produce geotextiles for soil reinforcement are monofilament, multifilament, slit-fihn monofilament, and slit-film multifilament (see chapter Manufacturing process of geotextiles). 

---