Material Properties
Sylomer® SR28 helps reduce both vibrations and noise in a range of applications, including buildings, machinery, and railway systems. Its benefits include lower maintenance requirements and enhanced comfort in areas where vibration is an issue.
- Combination of spring and damping characteristics.
- Elastic, versatile polyurethane material.
- Mixed-cell pore structure.
Features
Sylomer® SR28 is a high-performance material widely used for vibration isolation.
- High elasticity, long service life.
- Very low amplitude dependence.
- Proven long-term behaviour.
- High fatigue strength.
- Ability to provide customer-specific modifications.
Sylomer® SR28 Datasheet
Download the Anti-Vibration Polyurethane datasheet for Sylomer® SR28.
File size: 895kb
Range of use |
Compressive load |
Deformation |
|---|---|---|
| shape factor-dependent, values apply to shape factor q = 3 | ||
| Static range of use (static loads) | up to 0.028 N/mm² | approx. 7 % |
| Dynamic range of use (static plus dynamic loads) | up to 0.037 N/mm² | approx. 20 % |
| Load peaks (occasional, brief loads) | up to 1.0 N/mm² | approx. 75 % |
Specifications and tabular date for the Sylomer® SR28
All information and data for the Sylomer® SR28 is based on our current knowledge. The data can be applied for calculations and as guidelines, are subject to typical manufacturing tolerances and are not guaranteed. Material properties as well
as their tolerances can vary depending on type of application or use and are available on request. 1. Measurement / evaluation in accordance with the relevant standard. 2. The measurement is performed on a density-dependent basis with differing test parameters. 3. Values apply to shape factor q = 3.
Material properties |
Test methods |
Comment |
|
|---|---|---|---|
| Mechanical loss factor | 0.21 | DIN 53513¹ | temperature-, frequency-, specific load- and amplitude-dependent |
| Rebound resilience | 45% | EN ISO 8307¹ | |
| Compression hardness³ | 0.03 N/mm² | EN ISO 844¹ | at 10 % linear compression, 3rd load cycle |
| Compression set² | < 5 % | EN ISO 1856¹ | 50 % deformation, 23 °C, 72 h, 30 min after removal of load |
| Static modulus of elasticity³ | 0.19 N/mm² | at specific load of 0.028 N/mm² | |
| Dynamic modulus of elasticity³ | 0.42 N/mm² | DIN 53513¹ | at specific load of 0.028 N/mm², 10 Hz |
| Static shear modulus | 0.07 N/mm² | DIN ISO 1827¹ | at a pretension of 0.028 N/mm² |
| Dynamic shear modulus | 0.14 N/mm² | DIN ISO 1827¹ | at a pretension of 0.028 N/mm², 10 Hz |
| Min. tensile stress at rupture | 0.40 N/mm² | EN ISO 527-3/5/500¹ | |
| Min. tensile elongation at rupture | 200 % | EN ISO 527-3/5/500¹ | |
| Abrasion² | ≤ 1300 mm³ | DIN ISO 4649¹ | load 5 N |
| Coefficient of friction (steel) | 0.5 | Getzner Werkstoffe | dry, static friction |
| Coefficient of friction (concrete) | 0.7 | Getzner Werkstoffe | dry, static friction |
| Specific volume resistance | > 1010 Ω · cm | DIN EN 62631-3-1¹ | dry |
| Thermal conductivity | 0.045 W/(mK) | DIN EN 12667 | |
| Temperature range | -30 °C to 70 °C | short term higher temperatures possible | |
| Flammability | class E | EN ISO 11925-2 | normal combustible, EN 13501-1 |
Load deflection curve
Quasi-static load deflection curve for different bearing thicknesses. Quasi-static load deflection curve measured with a loading rate of 0.0028 N/mm²/s.
Testing between flat and plane-parallel steel plates, recording of 3rd load, with filtered starting range in accordance with ISO 844, testing at room temperature.
Shape factor q = 3
Modulus of elasticity
Load dependency of the static and dynamic modulus of elasticity. Quasi-static modulus of elasticity as tangential modulus from the load deflection curve. Dynamic modulus of elasticity from sinusoidal excitation with a velocity level of 100 dBv re. 5 · 10-8 m/s corresponding to a vibration amplitude of 0.22 mm at 10 Hz and 0.08 mm at 30 Hz.
Measurement in accordance with DIN 53513
Shape factor q = 3
Natural frequencies
Natural frequencies for different bearing thicknesses. Natural frequencies of a vibratory system with a single degree of free-dome, consisting of a mass and an elastic bearing made of Sylomer® SR 28 on a rigid surface.
Parameter: thickness of the Sylomer® bearing
Shape factor q = 3
Vibration isolation efficiency
Factor of transmission and isolation rate. Reduction of the transmitted mechanical vibrations by implementation of an elastic bearing consisting of Sylomer® SR 28 based on a stiff subgrade.
Parameter: factor of transmission in dB, isolation rate in %
Sylomer® product range
