Nonwoven fabrics can be made of either polyester or polypropylene but the majority of nonwoven fabrics used in the US are made of polypropylene staple fiber and are needle punched. Nonwoven filter fabrics are used as separation fabrics when higher water flow is required for the application. This can include acting as a separator between the drainage gravel backfill behind a retaining wall, wrapping the stone surrounding the pipe in a French drain, or as an underlayment below riprap. Nonwoven fabrics can also be treated to resist water flow and used as a pavement underlay by binding with the asphalt to create a barrier to water.

Technology

Non-woven needle punch is a combination of needling and thermal bonding process of fibers. Being polypropylene, the fiber used in the production of the non-woven product range are extremely durable and exhibit excellent chemical resistance to acids and alkalis at ambient temperatures, have an exceptionally low moisture absorption such that the action of water at ambient temperature has no effect on their mechanical properties and are resistant to microorganisms & insects and will not support the growth of mildew or fungi.

The nonwoven range of the staple fiber needle punched and thermally bonded nonwoven textiles have been designed to offer optimum performance per unit weight. Their resulting mechanical robustness and excellent hydraulic properties make them the ideal choice for separation and filtration.

Product Specification:

• Weight: 120 gsm – 800 gsm (3.54 oz – 23.50 oz)
• Width: 1m – 5m (3.28 ft – 16.4 ft)
• Length: 10m – 100m (32.8 ft – 328.08 ft)
• Color: As per customer requirements
• Composition: Polypropylene / Polyester / Re-generated
• Technology: Non-woven Needle punched

Uses

The most effective applicable areas of this geo-textiles technology are to protect erosions. Geotextiles provide the best protection for erosion prone sedimentary soils which are deficient in stability due to insufficient cohesion. In Bangladesh river bank soils are very unstable from erosional point of view. These soils are deposited by the action of river flow and therefore, are very prone to re-transportation. Geo-textiles technology provides the most effective solutions for these types of soils. The construction procedures practiced in Bangladesh is only intended for protection of river bank surface layers from erosion.

The existing designs normally do not incorporate any measure for overall stability of the slopes due to, for example, failure as a result of seepage towards the river, under rapid down condition. B. J. Geo-textiles technology may be used in these applications in reinforcing the banks from deeper failures as well as protecting the surface layers from erosion due to flow and/or wave action.

There are at least 80 specific applications areas for geotextiles that have been developed; However, the fabric always performs at least one of five discrete functions:

Separation – the use of a geotextile to prevent the intermix of dissimilar soil layers
Filtration – the use of a geotextile to allow the passage of fluids (mot commonly water) while preventing the uncontrolled passage of soil particles
Reinforcement – the use if the tensile properties of a geosynthetic material to resist stresses or contain deformation in soil structures
Drainage – the use of a geosynthetic layer to collect and transport fluids within its own thickness
Protection – the use of a geosynthetic material as a stress reduction layer to prevent or reduce damage to an adjacent surface or layer
Erosion control – the use of a geosynthetic material to prevent the loss of soil particles from water erosion

Road works –
– Permanent Roads
– Temporary roads
– Parking Areas
– Road Widening
– Asphalt Maintenance
– Airports
– Railways

Construction –
– Foundations
– Concrete Floors
– Impact Sound Suppression
– Roofs
– Roofs Garden

Ground systems –
– Pipes and Trenches
– Storage Areas
– Sport Grounds
– Slopes

Drainage/Filtration –
– Drainage Pipes
– Drainage Trenches
– Surface Drains
– Building Drains

Hydraulic works –
– Coastal Protection
– Dams
– Harbor Constructions
– River Banks and Canals
– Artificial Lakes
– Water Reservoirs

Waste disposal –
– Waste Disposal (Top Layers)
– Waste Disposal (Bottom Layers)
– Water Purification Systems

Agriculture –
– Ground Cover Fabrics
– Root Barrier Fabric
– Plant Protection Cloth
– Winter Protection Fabric