Flexible membrane
Designed with the flexibility required for tunnel and underground waterproofing applications.
EVA / ECB / PE Geomembrane for Tunnel Waterproofing
Polymer waterproofing membrane for railway tunnels, metro systems and other underground structures.
Available in EVA, ECB and PE materials, this membrane is produced by flat extrusion for waterproofing and seepage-control applications in tunnels and underground construction.
Product Overview
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EVA, ECB and PE waterproofing membranes are polymer sheet materials produced by flat extrusion for railway tunnel and underground waterproofing systems. The product is designed to provide a continuous waterproofing and seepage-control layer within the structure.
Typical applications include railway tunnels, metro tunnels, underground structures, basements and other waterproofing projects. The material is available in several thicknesses and widths to suit different project requirements.
Product facts
- Material options
- EVA / ECB / PE
- Manufacturing process
- Flat extrusion
- Thickness range
- 1.5–3.0 mm
- Available widths
- 2.0 / 3.0 / 4.0 m
- Roll length
- ≥ 20 m
- Typical applications
- Railway tunnels, metro tunnels and underground waterproofing
- Applicable standard
- TB/T 3360.1-2014
Key Features
Waterproofing performance
Provides a continuous membrane layer for waterproofing and seepage-control systems.
High elongation
The specification defines high elongation-at-break requirements for EVA, ECB and PE membrane types.
Low-temperature flexibility
The technical specification includes low-temperature flexural resistance at −33°C without cracking.
Environmental resistance
The specification includes aging, alkali-resistance and weather-resistance performance requirements.
Technical Specifications
Product standard
TB/T 3360.1-2014
Standard description
Railway Tunnel Waterproofing Materials — Part 1: Waterproofing Membrane
Technical data reference: customer-provided EVA / ECB / PE railway tunnel waterproofing membrane technical table.
| Property | Specification | Limit deviation |
|---|---|---|
| Thickness | 1.5 / 2.0 / 2.5 / 3.0 mm | −5% |
| Width | 2.0 / 3.0 / 4.0 m | −20 mm |
| Length | ≥ 20 m | −20 mm |
| Property | EVA | ECB | PE |
|---|---|---|---|
| Tensile strength at break — MPa | ≥ 18 | ≥ 17 | ≥ 18 |
| Elongation at break — % | ≥ 650 | ≥ 600 | ≥ 600 |
| Tearing strength — kN/m | ≥ 100 | ≥ 95 | ≥ 95 |
| Thickness | EVA | ECB | PE |
|---|---|---|---|
| 1.5 mm | ≥ 300 | ≥ 300 | ≥ 300 |
| 2.0 mm | ≥ 400 | ≥ 400 | ≥ 400 |
| 2.5 mm | ≥ 500 | ≥ 500 | ≥ 500 |
| 3.0 mm | ≥ 600 | ≥ 600 | ≥ 600 |
| Property | Test condition | EVA | ECB | PE |
|---|---|---|---|---|
| Watertightness | 0.3 MPa / 24 h | No leakage | No leakage | No leakage |
| Low-temperature flexural resistance | −33°C | No cracking | No cracking | No cracking |
| Heating dimensional change — Extension | — | ≤ 2 mm | ≤ 2 mm | ≤ 2 mm |
| Heating dimensional change — Shrinkage | — | ≤ 6 mm | ≤ 6 mm | ≤ 6 mm |
| Property | EVA | ECB | PE |
|---|---|---|---|
| Hot-air aging 80°C × 168 h | |||
| Tensile strength at break — MPa | ≥ 16 | ≥ 14 | ≥ 15 |
| Elongation at break — % | ≥ 600 | ≥ 550 | ≥ 550 |
| Alkali resistance Saturated Ca(OH)₂ solution × 168 h | |||
| Tensile strength at break — MPa | ≥ 17 | ≥ 16 | ≥ 16 |
| Elongation at break — % | ≥ 600 | ≥ 600 | ≥ 600 |
| Weather resistance | |||
| Retention of tensile strength at break — % | ≥ 80 | ≥ 80 | ≥ 80 |
| Retention of elongation at break — % | ≥ 70 | ≥ 70 | ≥ 70 |
Technical Notes
- The membrane should have a flat surface, neat edges and uniform thickness.
- Cracks, mechanical damage, creases, voids, bubbles and abnormal adhesion that affect use are not permitted.
- The membrane should not contain joints within the specified roll length.
- Surface dent depth should not exceed 5‰ of the membrane thickness where it does not affect use.
- Special specifications may be agreed between supplier and customer.
Discuss your product requirements
Send us your application, required specification, quantity and delivery destination for product review and quotation.
Useful information to provide
- Application
- Required material type
- Required thickness
- Required width
- Quantity
- Project location
- Delivery destination
- Applicable specification or drawing