Alfakel M1000/2000
Acoustic properties and vibrations
Applied onto sheet metal panels the Alfakel M tiles reduce the amplitude of vibrations and the radiated noise.
The Alfakel M tiles will achieve the following results in acoustic quieting:
- Rapid damping of vibrations originated from surfaces excited by shock
- Lower or eliminate resonance effect
- Reduce the propagation of bending waves vibrations
- “Anti-sheet” effect, that is the partial or total elimination of “metal characteristics” of the damped objects “tinniness”
The sound damping properties of the Alfakel M panels have the following properties:
Total Loss Factor
Total loss Factor ηtot for thickness ratio
Damping layer
———––————— = 2
Support Sheet
And for frequency of 200 Hz (DIN 53440, Vibrating bar test)
T = 20°C
ηtot = 0.05÷0.09
Decay rate
Decay rate Dt of the vibration amplitude as function of time (Geiger and SAE methods):
T = 20°
Dtot = 5÷12 dB/s.
Shear Modulus and Internal Damping
Shear modulus and Damping (ETAG method Interkeller):
| Temperature °C | G = a 200 Hz (Kg/cm2) | η a 200 Hz |
|---|---|---|
| 0 | 6000÷8000 | 0,2÷0,3 |
| 20 | 1800÷2500 | 0,4÷0,5 |
| 50 | 100÷150 | 0,9÷1,1 |
General properties
| Dimension: | 1230 x 1040 mm |
| Color: | black |
| Specific weight: | 5,5 kg/dm3 |
| Thickness: | 3 mm |
| Maximum Temperatures: | — 20 ÷ + 90°C |
| Burning rate: | V ≤ 20 mm/min (classes: self-extinguishing) |
| Flammability vertically: | classes V2 |
| Thermal conductivity: | 0,45 Kcal/mh °C |
| Water resistance: | good |
| Gasoline and oil resistance: | insufficient, when the surfaces are not protected |
| Diluted acid resistance: | medium |
More benefits
- Thermal bonding
- Fits well to the shape of the substrate
- Very easy to cut
- Anti-corrosion coated
Installation
Alfakel M damping tiles are made of thermoplastic materials and are generally heat installed. If needed, they can be applied using water based adhesives.
For heat based installations, follow these guidelines:
On horizontal surfaces the standard product (Alfakel M 1000) is placed before heating directly on the area to be treated.
Adequate temperatures required to obtain a correct adhesion of the Alfakel M thermo bonding tiles are 120+160°C.
Cold installation:
For horizontal and vertical surfaces use the product Alfakel M 2000 with contact adhesive applied to the substrate.
