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Typar® SF geotextile

Typar® SF geotextile

Typar® SF is a thermally bonded nonwoven geotexile, made of 100% polypropylene which is designed to have a combination of a high initial modulus (stiffness), high elongation (typically > 50%) and outstanding uniformity, to give superior performance, in all directions.

Resists damage during installation

DuPont™ Typar® SF combines a high initial modulus (first resistance against deformation) with a high elongation at break. This combination enables Typar® SF to absorb a higher level of energy compared with other geotextiles. This gives it a high resistance to damage during installation.


Resists rutting in the final construction

Rutting occurs as a result of the regular passage of wheeled transport over the structure. The resultant deformation develops in-plane tensile stresses, activates related membrane and restraints mechanisms. The high initial modulus of Typar® SF reduces deformation and thus reduces rutting.


Uniform performance

Typar® SF is an isotropic material, meaning that its physical properties are present in all directions. This mirrors the stresses and strains of a typical separation application. Typar® SF is manufactured to a very high level of uniformity using a continuous on-line, ß -ray monitoring process. All products that fail to meet the required standards are rejected and recycled.


Benefits of Typar® SF compared to other geotextiles


Vs Wovens

  • Higher uniformity
  • Higher elongation
  • Higher damage resistance
  • Less sensitive to blocking or blinding
  • Same filtration properties even under pressure


Vs Needlepunched

  • Lighter and thinner for the same performance
  • Higher initial modulus: higher rutting resistance,
  • Higher damage resistance
  • Higher filtration properties
  • Decrease of transport and stocking costs
  • Easier installation
  • Precompressed structure ensures that Typar® SF does not to soak or to freeze


Vs other thermally bonded geotextiles

  • Higher uniformity
  • Higher elongation
  • Higher initial modulus