Rail Pad
A rail pad, also named rail rubber plate, is usually used between tie plates and sleepers or between rails and tie plate. The rail pad is made of elastic polyurethane mat and usually used on concrete sleepers. The rail pad can protect the concrete sleeper from abrasion and impaction, and it can also decrease the vibration from the passing train. It is believed that rail pad functions in two ways: diminish shock and distribute load. The thickness of our rail pads ranges from 5mm to 25mm,but usually the height should not to be so high in case the movement relative to the rails.
A rail pad plays an important role in reducing shock and vibration, the detailed functions lie in the following:
- Distribute the load that the trains pressed on the rails with a larger elastic surface.
- Reduce the noise that trains hitting on the rails and improve the comfort of the passengers.
- The use of rail pad can decrease the abrasion of rails and prolong the service life of rail track.
- The elasticity of rail pad can decrease the vibration
The materials we use are mainly three types, HDPE, Polyethylene 80% and Vinyl Acetate 20%, rubber.
Different Types of Rail Pad
1. HDPE Rail Pad
Technical Parameter | Unit | Technical Requirement | Value |
---|---|---|---|
Density | g/cm3 | 0.95-0.98 | 0.95 |
Tensile Strength | Mpa | ≥19 | 19 |
Elongation | % | >80 | 150 |
Melting Point | ℃ | 170-190 | 190 |
Insulation Resistance | Ω | ≥1×1010 | 3.5 ×1010 |
Hardness | A | ≥98 | 98(A) |
2. EVA: Polyethylene 80%, Vinyl Acetate 20%.
Technical Parameter | Unit | Technical Requirement | Value |
---|---|---|---|
Density | g/cm3 | 0.95-0.98 | 0.95 |
Tensile Strength | Mpa | ≥15 | 16 |
Elongation | % | >500 | 550 |
Melting Point | ℃ | 170-190 | 170 |
Insulation Resistance | Ω | ≥1×1010 | 5.0 ×1010 |
Hardness | A | ≥90 | 92(A) |
3. Rubber Rail Pad
Technical Parameter | Unit | Value |
---|---|---|
Stiffness | KN | 90-130 |
Hardness Shore | ℃ | 72-80 degree |
Electronic Resistance | Ω | ≥ 106 |
Tensile Strength before Aging | Mpa | ≥12.5 |
Elongation before Aging | % | ≥250 |
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