Nonwoven Polyester Permeable Geotextile Separation Fabric

Product Definition

Nonwoven Polyester Permeable Geotextile Separation Fabric is a needle-punched geosynthetic material    engineered for separation, filtration, drainage, and protection in civil and infrastructure projects.    It allows controlled water flow while preventing soil migration, ensuring long-term structural stability    of roadbeds, foundations, and hydraulic systems.

Technical Parameters and Specifications

The following parameters are commonly specified in EPC tenders and infrastructure design documents    for Nonwoven Polyester Permeable Geotextile Separation Fabric.

• Raw material: 100% Polyester (PET)

• Manufacturing method: Needle-punched nonwoven

• Mass per unit area: 100 – 800 g/m²

• Thickness (2 kPa): 0.8 – 4.5 mm

• Tensile strength (MD/CD): 6 – 25 kN/m

• Elongation at break: 40% – 80%

• CBR puncture resistance: 1.0 – 6.5 kN

• Permeability coefficient: ≥ 1 × 10⁻³ m/s

• Apparent opening size (O90): 0.07 – 0.20 mm

• UV resistance: ≥ 70% strength retained after 500 h

• Operating temperature range: -40°C to +120°C

Structure and Material Composition

Nonwoven Polyester Permeable Geotextile Separation Fabric has a uniform three-dimensional fiber structure    that provides both mechanical strength and hydraulic performance.

Structural Composition

• Polyester Continuous or Staple Fibers: Provide tensile strength and chemical stability

• Needle-Punched Fiber Network: Creates high porosity and permeability

• Thermal or Mechanical Bonding Points: Enhance dimensional stability

• Open Pore Channels: Enable effective filtration and drainage

Manufacturing Process

The manufacturing process of Nonwoven Polyester Permeable Geotextile Separation Fabric    directly influences its filtration efficiency, strength uniformity, and service life.

Engineering Manufacturing Steps

1. Polyester fiber selection and quality inspection

2. Fiber opening, blending, and carding

3. Web formation and layering

4. Needle punching for mechanical bonding

5. Thermal setting and thickness stabilization

6. Online inspection for mass and tensile consistency

7. Roll cutting, labeling, and packaging

High-speed needle looms, automatic weight control systems, and tensile testing equipment    are essential to ensure compliance with engineering standards.

Industry Comparison

Nonwoven polyester geotextiles are often compared with other geosynthetic materials    used for separation and filtration.

Application Scenarios

Nonwoven Polyester Permeable Geotextile Separation Fabric is widely applied    across civil, transportation, and environmental engineering projects.

• Distributors: Supplying standardized geotextiles for regional infrastructure markets

• EPC Contractors: Roads, railways, airports, retaining structures

• Engineering Consultants: Filtration and separation layer design

• Project Owners: Long-term performance and reduced maintenance cost

Core Pain Points and Solutions

• Soil contamination: Geotextile prevents fine particle migration between layers

• Poor drainage: High permeability maintains continuous water flow

• Base course deformation: Separation function preserves aggregate integrity

• Complex installation: Lightweight rolls improve construction efficiency

Risk Warnings and Mitigation Strategies

Improper selection or installation may reduce performance.    Risks include clogging due to incorrect opening size,    mechanical damage during backfilling, and insufficient overlap.

Mitigation strategies involve soil compatibility analysis,    protective layers during installation, and adherence to    specified overlap and anchoring requirements.

Procurement Selection Guide

1. Analyze soil gradation and hydraulic requirements

2. Select appropriate mass per unit area

3. Verify tensile and puncture strength requirements

4. Confirm applicable standards and test methods

5. Review manufacturer production capability and QC system

6. Request samples and laboratory test reports

7. Evaluate logistics, roll sizes, and delivery schedule

Engineering Case Example

In a highway subgrade rehabilitation project covering 35 km,    300 g/m² nonwoven polyester permeable geotextile separation fabric    was installed between soft clay subsoil and crushed stone base.    The solution significantly reduced rutting, improved drainage,    and extended pavement service life under heavy traffic loads.

FAQ

• Q1: What is the main function of this geotextile?
  A: Separation and filtration.

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

• Q3: What grammage is typical for road projects?
  A: 200–400 g/m².

• Q4: Can it be used under riprap?
  A: Yes, with sufficient puncture resistance.

• Q5: How is permeability measured?
  A: According to standardized hydraulic tests.

• Q6: Does it replace sand filters?
  A: In many cases, yes.

• Q7: What overlap is recommended?
  A: Typically 300–500 mm.

• Q8: Is UV exposure allowed?
  A: Short-term exposure is acceptable.

• Q9: How long is the service life?
  A: Often exceeds 25 years when properly installed.

• Q10: Are custom roll sizes available?
  A: Yes, depending on production capacity.

Call to Action

To request quotations, technical datasheets, or engineering samples of    Nonwoven Polyester Permeable Geotextile Separation Fabric,    please provide your project specifications, soil conditions,    and applicable standards to our technical team.

E-E-A-T Author Credentials

This article is authored by a civil and geosynthetics engineering specialist    with more than 15 years of experience in geotextile manufacturing,    infrastructure project design support, and EPC material procurement    for transportation, hydraulic, and environmental engineering projects.