What is woven & non-woven geotextile?
Geotextile (literally means the earth protector) is actually a textile made of polypropylene (P.P) or polyester (PES / PET) polymers, which are produced in woven and non-woven forms.
Woven and Non-Woven Geotextile are permeable and have the ability to separate, filter, reinforce, protect or drain when used with soil. They are produced by various methods such as needle punching ,Heat Bonding, or chemical (Resin Bonding) and have a felt-like structure without specific warp and woof (non-woven). , Bearing pressure and shocks, bitumen absorption and most importantly the possibility of selective passage means the passage of fluids while soil particles are not allowed to pass.
woven geotextile fabric
Woven geotextile fabric is made by weaving polypropylene strips together and by an industrial textile machine. The use of a cross pattern in the production of this type of geotextiles has made this fabric extremely strong. The strength and quality of the woven geotextile hardware increases the tensile strength of the woven geotextile and thus makes it suitable for use under patios, paths, parking spaces and other applications that have a high strength membrane; But cost-effective need, it would be fit.
Structure and production process of textile geotextiles
The method of making these materials is the passage of fibers between each other and the formation of fiber. These geotextiles are made of single-stranded or multi-stranded fibers or cut films. Producing of such texture and suture fittings are used to produce special products. Most of the available geotextiles were made of polyester or polypropylene. Polypropylene material is strong and durable and is lighter than water (with a density of 9%), but polyester is heavier than water in terms of weight and has excellent creep and strength characteristics and is compatible with most soils.
non-woven geotextile fabric
Although nonwoven geotextile has less tensile strength than woven type; But do not forget that the strength, durability and drainage properties of this geotextile, like its woven model, are very ideal and suitable. Nonwoven geotextile is a felt-like fabric made by thermal bonding of polypropylene or a mixture of polypropylene and polyester fibers and then produced using needle drilling, calendaring and other methods.
This type of geotextile fabric is easier to cut and its permeability to water is high and its resistance to liquids does not increase over time, while the woven fabric disappears over time when they are used underground paths or for the Rivers. Therefore, considering such features, it can be said that non-woven geotextiles are used for underpasses and in land and storm drainage systems; Which are the places that need long-term stabilization and filtration of the earth are very ideal.
Geotextiles are divided into two general types, woven and non-woven.
structure and production process of nonwoven geotextiles
Nonwoven or nonwoven geotextiles are produced by bonding materials together, or by chemicals or heat, needle punching, or other methods. These types of geotextiles are made of strip-shaped fibers (short strip fibers, often 1 to 4 inches long) or continuous end filaments that are irregularly distributed in lattice layers. The filaments or fibers connecting the filaments or fibers are connected together. Non-woven geotextiles are made with a needle by taking a large number of small fibers and using a barbed needle to blend the fibers. The role of non-woven geotextiles is sub-drainage, erosion control and road reinforcement on soft and loose soils.
the difference woven & non-woven geotextiles
Geotextile fabrics are used according to the needs of projects and have various benefits and applications; But as the name of these two types of geotextiles shows, the main difference is not in how they work, but the main difference between the two is only in how they are produced. Woven geotextiles are woven and produced by industrial weaving machines, while non-woven geotextiles are produced by a special method called needlework method and by a series of barbed needles and have a non-woven and felt-like appearance.
Polypropylene geotextile is lighter, stronger and more durable than polyester geotextile.
Due to the different construction methods, the weight of a non-woven geotextile in modern methods is often less than the weight of a woven geotextile. In general, because woven geotextiles are used to create separation and reinforcement and do not depend on weight, and conversely, the weight of a non-woven geotextile is often determined because the higher calorific value, it would increase the strength and life.
woven and non-woven geotextile applications
- The role of separation on the road
- Road surface
- Road infrastructure
- Railway infrastructure
- Erosion control
- Protective walls
- Underground drainage, behind retaining walls, columns and vertical surfaces
- Waste control and maintenance
- Liquid and gas collection system
- Geomembrane protection
- Stabilization and consolidation of railways
- Protection and drainage systems under artificial turf
- Lining and insulation of tunnels
- Exploitation of swampy lands
- Earthquake resistance
- Filters in irrigation canals
- Filters in earthen dams
- Protection of river banks and seas
- Sewage tanks and land elephants in tunnel insulation
- Water and chemical storage tanks
- Strengthening the bed of embankments and artificial slopes
- Construction of airport runway
- The role of separation on the road
And other applications. For more information, read the article Types and Uses of Geotextiles in industries