Non-Woven Needle-Punched Geotextile Fabric: Geosynthetic Protection by SherkatTrade

The Foundation of Resilient Infrastructure: Needle-Punched Non-Woven Geotextiles by SherkatTrade

In contemporary civil infrastructure, agricultural reservoir lining, landfill containment, and highway pavement construction in 2026, geosynthetic technology has become essential to guaranteeing structural safety and environmental compliance. When lining water reservoirs or tailings ponds with HDPE/LLDPE geomembranes, sharp subgrade rocks and aggregate friction pose an omnipresent puncture risk. SherkatTrade's Needle-Punched Non-Woven Geotextile Fabrics act as an impenetrable protective cushion, hydraulic filtration boundary, and tensile reinforcement matrix, ensuring decades of leak-free performance.

Manufactured in our dedicated geosynthetics complex in Isfahan, our geotextiles are produced from 100% virgin staple polypropylene (PP) or high-tenacity polyester (PET) fibers. Engineered through high-density mechanical needle-punching followed by calibrated thermal surface calendering, our geotextile delivers a robust three-dimensional tortuous pore structure. This structure ensures superior chemical inertness against soil leachate, extreme hydraulic permeability, and outstanding resistance to biological and environmental degradation.

---

The 4 Crucial Geotechnical Engineering Functions of SherkatTrade Geotextiles

1. Geomembrane Cushion & Protection:
   Acts as a heavy-duty stress-dissipating cushion laid beneath geomembrane liners in reservoirs, canals, and heap-leach mining pads, neutralizing concentrated point loads from subgrade rocks and sharp gravel.
2. Subgrade Separation:
   Prevents the intermixing of distinct soil layers (such as subbase crushed aggregates and soft clay subgrade), sustaining pavement load-bearing capacity and preventing rutting.
3. Hydraulic Filtration:
   The uniform micro-pore matrix allows ground liquids to flow freely across the fabric plane while restraining soil particles, preventing internal erosion and piping failures.
4. Planar Transmissivity & Drainage:
   The substantial compressed thickness provides high planar fluid transmissivity, directing trapped gases and hydrostatic pressures safely toward collection drains.

---

Technical Specifications & Engineering Test Standards (ASTM / ISO 2026 Edition)

Our in-house quality control laboratory certifies each production roll against stringent international testing protocols:

• Polymer Base Composition: 100% Virgin UV-Stabilized Polypropylene (PP) or High-Modulus Polyester (PET).
• Areal Mass Range: 150 g/m² up to 1000 g/m² (Standard Commercial Mass: 200, 300, 350, 400, 500, and 800 GSM).
• Roll Width Dimensions: Continuous 2.0 m up to 6.0 m widths (minimizing joint overlaps, waste, and installation labor).
• Roll Length: 50 m to 150 m per roll depending on unit weight.
• Static Puncture Resistance (CBR Test - ASTM D6241):
  • 300 GSM: Exceeding 2,400 Newtons.
  • 500 GSM: Exceeding 4,200 Newtons, providing high resistance against angular crushed stone.
• Wide-Width Tensile Strength (ASTM D4595): From 10 kN/m to over 45 kN/m along longitudinal and transverse axes.
• Mullen Burst Strength (ASTM D3786): Exceeding 3,000 kPa for heavy structural grades.
• Water Permeability & Flow Rate (ASTM D4491): 100 to 250 L/m²/sec, ensuring rapid dissipation of groundwater pressures.
• Apparent Opening Size (AOS / O90 - ASTM D4751): 0.07 mm to 0.15 mm, engineered to prevent fine silt clogging while permitting maximum effluent passage.
• UV Resistance (ASTM D4355): Retains over 70% of initial tensile strength after 500 hours of accelerated xenon arc exposure.
• Chemical & Biological Stability: 100% resistant to soil bacteria, fungi, alkalis, and acids across a pH spectrum from 2 to 13.

---

Project Application Matrix for SherkatTrade Geotextiles

---

Material Comparison: Polypropylene (PP) vs. Polyester (PET) Geotextiles

---

Best Practices for Field Installation Under Geomembranes

1. Subgrade Preparation: Excavate ground and clear roots, vegetation, and stones larger than 5 mm. Compact soil to at least 85% standard Proctor density.
2. Smooth Deployment: Unroll wide-width geotextile rolls without excessive stretching or creating wrinkles. Maintain longitudinal and transverse overlaps of 200 mm to 300 mm.
3. Anchor Trenching: Secure top edges of both geotextile and geomembrane inside the perimeter anchor trench, backfilling and compacting thoroughly.
4. Joint Bonding: Fix overlaps using hot-air welding, industrial portable sewing machines, or heavy staples to prevent wind displacement prior to geomembrane deployment.

---

Frequently Asked Questions (FAQ)

What geotextile weight should be specified beneath a 1.5mm HDPE reservoir liner?

For standard rocky or aggregate-rich earthen subgrades, a 300 to 350 GSM polypropylene geotextile is standard engineering practice. For blasted mountain rock subgrades, specify 400 to 500 GSM for elevated puncture safety margins.

Does geotextile alone provide waterproof containment?

No. Non-woven geotextile is a highly permeable fabric designed for drainage, filtration, and mechanical cushioning. Absolute waterproofing is achieved by pairing the geotextile with an impermeable HDPE or LLDPE geomembrane sheet.

What are the advantages of SherkatTrade's 6-meter wide rolls?

Wider rolls reduce the number of joint overlaps by up to 40%, cutting field installation time in half, minimizing seam vulnerabilities, and significantly lowering total project material costs.

---

Request Engineering Consultations, Lab Datasheets & Pricing

Connect with the civil engineering and geosynthetics division at SherkatTrade to review project design drawings, confirm technical parameters, and receive competitive project pricing:

• 📞 Engineering Projects & Export Desk: Direct consultations for volumetric container freight, project schedules, and customized GSM production.
• 📦 Complimentary Sample Swatches: Verified laboratory test reports and sample swatches shipped directly to your engineering firm or job site.
• 🚚 Regional Multi-Modal Logistics: Rapid shipping of protected wrapped rolls from Isfahan to all Persian Gulf ports, Central Asian border crossings, and major international transit corridors.