TechTex UV - UV Resistant Needle Punched Nonwoven Geotextile
TechTex UV
TechTex UV is a nonwoven geotextile produced by needle punching high strength 100 percent pure polypropylene fibres and applying heat treatment. TechTex UV is developed for applications that remain exposed. Polypropylene fibres lose strength when left under sunlight for extended periods in their natural state, whereas this product retains its performance in areas that stay uncovered after placement thanks to its enhanced UV resistance. The needle punching process mechanically interlocks the fibres with one another, while the heat treatment stabilises the surface and provides dimensional stability. The product can be manufactured in different weights and strength values according to project requirements.
TechTex UV Functions
When placed between two soil layers of different particle sizes, TechTex UV performs four functions in a single layer. Its fibre structure allows water to pass while retaining fine particles, providing both drainage and filtration. The same structure prevents the two layers from mixing and distributes the stresses beneath the fill over a wide area. The 100 percent polypropylene raw material makes the product resistant to chemical effects in the soil, while its UV resistance limits strength loss in applications that remain exposed after placement.
Drainage
The needle punched fibre structure has the capacity to transmit water within its own plane. It collects water accumulating in the soil laterally and directs it towards the drainage line, preventing a rise in pore water pressure and the associated loss of stability.
Filtration
The pore structure of the product allows water to pass freely while preventing the migration of fine soil particles. This delays the clogging of the drainage aggregate with fine material over time and allows the drainage system to retain its function for a long period.
Reinforcement
Fill placed over weak subgrade spreads laterally under load and causes settlement. With its high strength fibre structure, TechTex UV distributes the stresses beneath the fill over a wide area, reducing the risk of local failure and contributing to bearing capacity.
Separation
When two soil layers of different particle sizes come into direct contact, fine particles fill the voids of the granular material and the fill loses its bearing capacity. TechTex UV forms a continuous separating layer between the two courses, preventing this mixing and preserving the performance of the granular fill.
Needle Punched Fibre Structure Delivering High Puncture Resistance at Low Weight
In TechTex UV, polypropylene fibres are mechanically interlocked with one another by thousands of needles, after which the surface is stabilised by heat treatment. Rather than holding the fibres in a single plane, this structure forms them into a three dimensional network, so that when sharp edged particles press against the surface the load is transferred not to a single fibre but to the surrounding fibres as well. As a result, the product delivers the same performance at a lower weight. Reducing the risk of tearing and puncture during placement is critical in applications used beneath crushed stone or rubble fill.
TechTex UV Features
- Produced by needle punching 100 percent pure polypropylene fibres and applying heat treatment
- Limits strength loss in applications that remain exposed after placement thanks to its UV resistance
- Its high elongation capacity conforms to irregular surfaces and settlements, reducing the risk of tearing
- Offers high tensile and puncture strength at low weight
- Maintains filtration performance under dynamic loads
- Protects the geomembrane surface against puncture under high pressure
- Shows high resistance to chemicals and microorganisms in the soil
- Allows water to pass while preventing the migration of fine soil particles
Frequently Asked Questions
1. What Is TechTex UV?
TechTex UV is a nonwoven geotextile produced by needle punching 100 percent pure polypropylene fibres and applying heat treatment. Thanks to its enhanced UV resistance, it retains its performance in applications that remain exposed after placement.
2. What Is the Difference Between TechTex UV and a Standard Geotextile?
Polypropylene fibres lose strength when left under sunlight for extended periods in their natural state, which is why standard geotextiles need to be covered shortly after placement. TechTex UV, with its enhanced UV resistance, can be used in applications where the exposure period is longer.
3. Which Functions Does TechTex UV Provide?
It performs drainage, filtration, reinforcement and separation functions in a single layer. Its fibre structure allows water to pass while retaining fine particles, and the same structure prevents layers of different particle sizes from mixing and distributes the stresses beneath the fill over a wide area.
4. What Does the Needle Punching Process Provide?
Needle punching mechanically interlocks the fibres with one another using thousands of needles, forming a three dimensional network structure. When sharp edged particles press against the surface, the load is transferred not to a single fibre but to the surrounding fibres as well, which allows the product to show high puncture resistance at a low weight.
5. Can TechTex UV Be Used for Geomembrane Protection?
Yes, it is placed over geomembranes as a protection layer in projects such as landfill sites and mine tailings facilities. It prevents sharp particles in the fill material above from puncturing the geomembrane surface.
6. Where Is TechTex UV Used?
It is used in geomembrane protection applications, stream rehabilitation and flood protection structures, highway drainage lines, and as a separation layer in road and railway platforms. It is also preferred in applications requiring separation and drainage beneath revetment material.
