HPS5 Heavy Duty Non-Woven Geotextile Membrane

HPS5 is a heavy duty needle-punched non woven geotextile membrane manufactured from 100% virgin polypropylene high tenacity fibres, incorporating 1% active carbon black for long term UV stability. It is engineered for applications where standard geotextiles are at risk of puncture, abrasion or long term degradation.

This membrane is optimised for performance rather than mass. Its thickness, elongation and puncture resistance allow it to absorb high localised loads without tearing, making it suitable for direct placement beneath rock armour and other aggressive materials. The high elongation enables the fabric to deform under point loading while maintaining filtration and hydraulic performance.

In service, HPS5 provides effective soil filtration and separation while allowing controlled water flow. The carefully controlled pore size prevents soil migration while maintaining permeability, even under sustained load. Its in-plane drainage capacity helps dissipate pore water pressure beneath armour layers and heavy fills.

HPS5 is commonly specified in landfill cells and capping systems to protect geomembranes, in coastal and river defence works beneath rock armour, and in heavy civil engineering projects where failure would be costly or hazardous. It is also used in erosion control schemes where traditional granular filter layers would be impractical or uneconomical.

This product is not intended for domestic landscaping or standard drainage applications. It is a specialist geotextile for engineered systems operating under extreme mechanical and environmental stress.

Install HPS5 in accordance with project specifications. Due to the nature of its applications, overlap requirements and anchoring details should be confirmed by the project engineer. The membrane should be protected from prolonged UV exposure prior to burial.

• Extreme duty non woven geotextile for protection and filtration
• Designed for direct placement beneath rock armour
• High puncture resistance and abrasion tolerance
• High elongation to absorb point loading without tearing
• UV stabilised with active carbon black for long term durability
• Supplied in wide rolls to reduce joints on site

Manufactured from 100% virgin polypropylene high tenacity fibres with 1% active carbon black. Needle-punched construction provides high extensibility, toughness and resistance to mechanical damage.

Product grade: HPS5
Fabric type: Non woven, needle punched
Polymer: 100% virgin polypropylene
Colour: Black
Mass per unit area: 400 gsm
Thickness at 2kPa: 4.9 mm
Tensile strength MD / CMD: 30 / 30 kN per metre
Tensile elongation MD / CMD: 80 / 80 percent
Static puncture resistance (CBR): 5.0 kN
Push through displacement: 65 mm
Dynamic cone drop: 5 mm
Protection efficiency: 14 kN per m²
Apparent opening size O90: 80 microns
Water flow normal to plane: 65 litres per m² per second
Coefficient of permeability: 6.4 x 10⁻³ m/s
Roll width: 6.0 m
Roll length: 150 m
Roll coverage: 900 m²