Polyester Non Woven Geotextile Drainage Filter Fabric

Product Definition

Polyester Non Woven Geotextile Drainage Filter Fabric is a needle-punched, permeable geosynthetic made from continuous or staple PET fibers, engineered to provide filtration, separation, drainage, and protection functions in civil, environmental, and infrastructure engineering projects.

Technical Parameters and Specifications

Polyester non woven geotextile drainage filter fabric is specified based on mechanical strength, hydraulic performance, and durability to ensure long-term performance in drainage systems.

• Mass per unit area: 100–800 g/m²

• Thickness (2 kPa): 0.8–4.5 mm

• Tensile strength (MD/CD): 8–35 kN/m

• Elongation at break: 40%–80%

• CBR puncture resistance: 1.2–6.5 kN

• Apparent opening size (AOS): 70–200 μm

• Permittivity: ≥1.0 s⁻¹

• Water flow rate: ≥80 L/m²/s

• UV resistance (500 h): ≥70% strength retained

• Service life: ≥50 years (buried conditions)

Structure and Material Composition

The functional performance of polyester non woven geotextile drainage filter fabric is determined by its internal fiber structure and bonding method.

• Raw material: Virgin or high-grade recycled polyester (PET)

• Fiber form: Staple fibers or continuous filaments

• Bonding method: Mechanical needle punching

• Pore structure: Three-dimensional interconnected voids

• Surface characteristics: High friction coefficient for soil interaction

Manufacturing Process

The manufacturing process is highly controlled to ensure uniform filtration and mechanical stability.

1. Polyester fiber preparation and opening

2. Carding and web formation

3. Cross-lapping to achieve target weight and thickness

4. Needle punching for mechanical bonding

5. Heat setting and dimensional stabilization

6. Roll cutting and edge trimming

7. Quality inspection and batch traceability

Industry Comparison

Application Scenarios

Polyester non woven geotextile drainage filter fabric is widely adopted across infrastructure and environmental engineering sectors.

• Distributors: Drainage and geosynthetic product supply chains

• EPC contractors: Road subgrade and railway drainage systems

• Engineering consultants: Retaining walls and slope stabilization

• Developers: Landfill leachate and stormwater management projects

• Municipal authorities: Urban drainage and flood control works

Core Pain Points and Engineering Solutions

• Soil clogging: Optimized pore size maintains filtration without blocking

• Insufficient drainage: High permittivity ensures continuous water flow

• Material degradation: Polyester offers strong chemical and biological resistance

• Installation damage: High puncture resistance reduces construction risk

Risk Warnings and Mitigation

Improper specification or installation may compromise drainage performance.

• Match AOS values to soil gradation to prevent piping

• Avoid prolonged UV exposure before burial

• Prevent excessive tension during installation

• Ensure overlap lengths meet project specifications

Procurement and Selection Guide

1. Analyze soil particle size distribution

2. Define required filtration and drainage performance

3. Select appropriate mass per unit area

4. Verify tensile and puncture strength test reports

5. Confirm chemical compatibility with site conditions

6. Review roll dimensions and installation logistics

7. Request third-party quality certifications

Engineering Case Application

In a highway embankment drainage project, 400 g/m² polyester non woven geotextile drainage filter fabric was installed behind retaining structures and around perforated drainage pipes. The system effectively reduced pore water pressure, prevented soil migration, and has remained operational after six years of continuous service.

FAQ

• Q1: What is the main function of this geotextile? A: Filtration and drainage.

• Q2: Is polyester suitable for acidic soils? A: Yes, with good chemical resistance.

• Q3: Can it replace sand filters? A: In most engineered drainage systems, yes.

• Q4: What weight is commonly used for drainage? A: 200–400 g/m².

• Q5: How is it installed? A: Rolled directly over prepared subgrades.

• Q6: Can it be used underwater? A: Yes, with proper anchoring.

• Q7: What is the typical roll width? A: 2–6 meters.

• Q8: Is it resistant to biological degradation? A: Yes.

• Q9: How long does it last underground? A: Over 50 years.

• Q10: Does it require maintenance? A: No routine maintenance is required.

Call to Action

For detailed technical datasheets, laboratory test reports, project-specific recommendations, or bulk procurement quotations of polyester non woven geotextile drainage filter fabric, professional buyers and engineering teams are invited to request comprehensive technical support.

E-E-A-T Author Credentials

This article is authored by a geotechnical materials specialist with more than 15 years of experience in geosynthetics engineering, supporting EPC contractors, consultants, and international B2B procurement teams across infrastructure and environmental protection projects.