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ACOUSTIC MATERIALS
Alfakel M - Serie 1000/2000
Alfakel M - Serie 4000
Alfakel M - Serie 6000


SOUNDPROOFING TREATMENTS
Alfakel B - Serie 202
Alfakel B - Serie 208


INDUSTRIAL SILENCERS
S - Serie 102
S - Serie 200


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Alfa BS - 2M - Iboce
Alfa TM/ALL - TM/ACC
Alfakel V1000 cert

Alfakel V2000

 




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Noise Damping Panels

Alfakel M1000/2000

Description

These heat laminated bituminous panels are filled with high density materials. These flat tiles can be die-cut in variable sizes.
Depending on the application, one surface can be treated with a protecting coat or pressure adhesive. Due to their viscoelastic characteristics the Alfakel M panels damp the vibrations generated by metal surfaces excited by shock or airborne sounds and transform part of the vibration energy into heat through processes of inner friction.


Applications

The Alfakel M damping panels reduce the vibrations of sheet metals and the radiated noise.
Particularly, they can be placed over engine components, industrial machinery, steel furniture, ventilation fans, compressors, refrigerators, washers, vacuum cleaner, dish washers, etc.


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 at 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:
Color:
Specific weight:
Thickness:
Maximum Temperatures:
Burning rate:
Flammability vertically:
Thermal conductivity:
Water resistance:
Gasoline and oil resistance:
Diluted acid resistance:

1230 x 1040 mm
black
5,5 kg/dm3
3 mm
— 20 ÷ + 90°CBurning rate:
V ≤ 20 mm/min (classes: self-extinguishing)
classes V2
0.45 Kcal/mh °C
good
insufficient, when the surfaces are not protected
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.


Alfakel s.r.l. • Via G. Galilei 39/D • 42027 Montecchio Emilia (RE)
Tel. 0522 86.35.23 Fax 0522 86.60.08 • E-mail: info@alfakel.it


Alfakel ®
The descriptions of Alfakel’s products are merely indicative. Alfakel retains the rights to apply further modifications.

 




 

 



 


Alfakel s.r.l. • Via G. Galilei 39/D • 42027 Montecchio Emilia (RE) • P.IVA 01838090353
Tel. 0522 86.35.23 • Fax 0522 86.60.08 • e-mail:info@alfakel.it