Gnee Steel (Tianjin) Co., Ltd. is one of the most reliable manufacturers and suppliers of polyurethane under sleeper pad in China, also supports customized service with low price. Please feel free to buy cheap polyurethane under sleeper pad made in China here from our factory.
Product Introduction
Polyurethane under sleeper pads are elastic buffer components manufactured from polyurethane material, installed between rail sleepers and the ballast bed. They primarily function to absorb vibration and impact forces generated by train operations, distribute sleeper loads, and protect track infrastructure. These engineered elements play a critical role in modern railway systems by enhancing track stability and extending maintenance cycles.
Material Composition
The pads utilize polyurethane as the core material, with customizable formulations that allow for varying density (typically 300-800kg/m³) and hardness (Shore A 60-90). Advanced versions incorporate:
- Reinforcing fibers (glass or polyamide) for improved tensile strength
- UV stabilizers and anti-oxidants for extended outdoor service life
- Hydrophobic additives for moisture resistance in wet environments
Performance Advantages
Mechanical Durability:
Exceptional abrasion resistance (≤50mm³ loss in DIN 53516 testing)
High tear strength (≥50kN/m per ISO 34-1) withstands long-term dynamic loading
Environmental Adaptability:
Maintains elasticity across -40°C to +80°C temperature range
Operational Benefits:
- Lightweight design (20-30% lighter than rubber equivalents) simplifies handling
- Modular construction enables rapid installation/replacement
- Chemically inert formulation prevents ballast contamination
Technical Compliance
Meets EN 16730 Class 3 requirements for polyurethane rail pads, with optional fire-resistant (EN 45545-2) and low-smoke formulations for tunnel applications.
Product Specifications
| Elastomer thickness range | 7-20mm |
| Micro-Filament Fastening (MFF) thickness | 0.7mm |
| Density range | 710-1200kg/m2 |
| Geometry | Flat |
| Static bedding modules range | 0.08-0.25N/mm2 accordiing to DIN45673-6 |
| Dynamic bedding modules range (10Hz) | 0.08-0.32N/mm2 accordiing to DIN45673-6 |
| Pull-out strength | ＞0.5MPa according to DIN45673-6 |
Product Application
High-speed railway: adapt to high-frequency vibration, reduce structural loss, and ensure smooth driving.
Heavy-duty railway: wear-resistant and tear-resistant, withstand large loads, and extend component life.
Tracks in special climate zones: stable performance in cold and high temperature environments, suitable for all types of tracks.
As an internationally leading expert in rail engineering solutions, GNEE RAIL focuses on the research and development and production of high-performance railway sleeper pad systems, providing innovative rail vibration reduction technologies for global railway operators and engineering contractors.
▌Product technology highlights:
• Adopting nano-enhanced composite technology, fatigue resistance is improved by 40%
• Patented drainage trough design effectively solves the problem of water accumulation on the roadbed
• Modular structure, installation efficiency is improved by 50%
• Optional intelligent monitoring version (built-in sensor real-time monitoring)
▌Global service capabilities:
✓ Multilingual technical support team
✓ Localized warehousing solutions
✓ Fast sample delivery
▌Quality assurance system:
Full-process digital quality tracking
Each batch of products comes with a test report
10-year quality commitment guarantee
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