SR 28
Fixed
Customized
International
Bearing
Polyurethane rubber
12.5/25mm
1.5m wide, 5.0m long
Up to 1.5m wide, up to 5.0m long
Customized
THERMOTEST/OEM
Carton
Customized
China
Product Description
Material: Mixed-celled PU elastomer (Polyurethane)
Color: blue
Dimensions can be customized,Other dimensions, punched and moulded parts on request.
PRODUCT PROPERTIES
- Combination of spring and damping characteristics
- Elastic, versatile polyurethane material
- Mixed-cell pore structure
ADVANTAGES
- High elasticity, long service life
- Static range of use of 0.011 N/mm2 to 1.2 N/mm2
- Load peaks up to 6.0 N/mm2
- Very low amplitude dependence
- Proven long-term behaviour
- High fatigue strength
- Finely graded range (10 standard types) for optimum system design
- Ability to provide customer-specific modifications
Range of use | Compressive | Deformation |
| Shape factor-dependent, the specified values apply to shape factor of q=3 | ||
| Static range of use (static loads) | up to 0.028N/mm2 | approx. 7% |
| Impact range of use (dynamic loads) | up to 0.037N/mm2 | up to 20% |
| Load peaks (occasional, brief loads) | up to 1.0 N/MM2 | approx. 75% |
Technical Data
| Material Properties | Test Methods | Comment | |
| Mechanical loss factor | 0.21 | DIN 53513 1 | temperature-, frequency-, specific load- and amplitude-dependent |
| Rebound resilience | 45 % | EN ISO 8307 1 | |
| Compression hardness 3 | 0.03N/mm2 | EN ISO 844 1 | at 10 % linear compression, 3rd load cycle |
| Compression set 2 | < 5 % | EN ISO 1856 1 | 50 % deformation, 23 °C, 72 h, 30 min after removal of load |
| Static modulus of elasticity 3 | 0.19 N/mm2 | at specific load of 0.028 N/mm2 | |
| Dynamic modulus of elasticity 3 | 0.42N/mm2 | DIN 53513 1 | at specific load of 0.028 N/mm2, 10 Hz |
| Static shear modulus | 0.07N/mm2 | DIN ISO 1827 1 | at a pretension of 0.028 N/mm2 |
| Dynamic shear modulus | 0.14N/mm2 | DIN ISO 1827 1 | at a pretension of 0.028 N/mm2, 10 Hz |
| Min. tensile stress at rupture | 0.40 N/mm2 | DIN EN ISO 527-3/5/500 1 | |
| Min. tensile elongation at rupture | 200% | DIN EN ISO 527-3/5/500 1 | |
| Abrasion 2 | ≤ 1300 mm3 | DIN IS O 464 9 1 | load 5 N |
| Coefficient of friction (steel) | 0.5 | Werkstoffe | dry, static friction |
| Coefficient of friction (concrete) | 0.7 | Werkstoffe | dry, static friction |
| Specific volume resistivity | > 1010 Ω·cm | DIN EN 6 2631-3-1 1 | dry |
| Thermal conductivity | 0.05 W/mK | DIN EN 12 667 | |
| Temperature range | -30 °C to 70 °C | short term higher temperatures possible | |
| Flammability | class E | EN ISO 11925-2 | normal combustible, EN 13501-1 |
1Measurement/evaluation in accordance with the relevant standard
2 The measurement is performed on a densitydependent basis with differing test parameters
3 Values apply to shape factor q = 3
· 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
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
· Quasi-static modulus of elasticity as tangential modulus from the load deflection curve. Dynamic modulus of elasticity from sinusoidal excitation at a vibration velocity 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
· Measurement in accordance with DIN 53513
· Shape factor q = 3
· Natural frequencies of a vibratory system with a single degree of freedome, 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
· Parameter: thickness of the Sylomer® bearing
· Shape factor q = 3
· 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 %
· Parameter: factor of transmission in dB, isolation rate in %
