Sandwich Foil SFRT

Sandwich Foil SFRT

Sandwich foil SFRT is a viscoelastic foil of fibre-enforced bitumen. The foil has self-adhesive glue at both sides for the application in between two constraining layers of constructional material.

Areas Of Application

Industry
Workshop machines, fans, mills, printers, material handling machines, particle separators, power equipment, generators, compressors, food processing machines, hoods.

Transportation and vehicles
Bus floors, off road vehicles, forest machines, ships and railway wagons.

Office
Printers, sorting- and enveloping machines, loud speakers.

Architecture
Elevators, steps, engine rooms, ventilation installations, doors, floors, transportation shoots, fans.

Method of use
The pieces are cut or punched out to the desired shape and carefully pressed on to the surface to be damped. When applied, the surface must be free from oil, dirt, and dust. The pressure has to exceed 30 N/cm2 for at least five minutes.

Advantages

Very good structure damping also for thick constructions of wood and metal
Good damping for a wide frequency range
Increase the transmission loss, especially for wood constructions
Water-repellent
Long service life

Technical Data

Loss factor:
See PDF diagram.

Temperature resistance:
-30°C to +100°C

Fire class:
FMVSS 302

Coefficient of thermal conductivity:
Lambda=0.11W/m°C

Colour:
Black

Adhesive’s tear strength:
Approx. 15 N/cm test width

Environmental:
Freon and PVC free

Thickness:
1.6 mm

Weight:
1.3 kg/m2

Delivery format:
1000x1000mm (other sizes and shapes can be supplied on request)

Advice

The shaping and positioning of the material is of major importance to achieve an optimal sound-dampening effect. Sontech has long experience of practical noise control projects in a wide range of industrial fields. These experiences can be a valuable addition to the laboratory data given in the datasheet. Sontech can also assist with advice and sound measurements for noise control and in the manufacture of customised material sets.