Description:
Dynamat Original is a styrene-butyadine-rubber-
based, pressure-sensitive adhesive-backed, heat
bondable vibrational damper. Dynamat Original
conforms and fuses easily to sheet metal and
other hard substrates. Material performance is
optimized for temperature ranges between 14°F
and 86°F (-10°C to +30°C). Material can
withstand temperature extremes between -22°F
and +350°F (-30°C to +177°C) and is highly
resistant to aging.
Acoustic Properties:
The acoustic loss factor "n" is used as a measure
of a material's ability to damp structure-borne
sound by stating how much vibrational energy (in
steel sheets for instance) is converted to heat
rather than sound. For constructions containing
several layers of damping material, the combined
loss factor "n comb" is used. The theoretical
maximum loss factor is 1 (no vibration). An
undamped 1mm thick steel panel has a loss factor
of roughly 0.001 at 200 Hz. Dynamat Original
applied to that panel would increase the loss
factor to 0.14 @ +50°F (+10°C). Multiple layers of
Dynamat Original improve sound damping even
more.
Applications:
Dynamat Original can be cut to shape and placed
onto the body surface directly on painted panels
or after the sheet metal is cleaned before painting
(typically at the sealer application operation).
Dynamat Original is used to treat metal panels,
partitions, ducts, doors, bins, panels, and so forth
in railroad cars, buses, automobiles, and ships. It
is also used for ventilation ducts, relay cabinets,
steel furniture, home appliances, sink units,
computer equipment, machine tools and many
other objects that suffer from vibration-produced
noise.
Installation:
Use scissors, knife or die to cut Dynamat Original
to the desired size and shape before removing the
release liner. Next, remove dust, grease,
moisture, and other foreign matter from the
application surface. Peel off the release liner. The
simplest application technique is to bend the mat
slightly and attach it along its shortest edge. Press
the mat firmly into place, using a roller for larger
pieces. The roller reduces the risk of leaving air
pockets, which reduce Dynamat's sound damping
capacity. The temperature of the mat and
application surface should not be below room
temperature during fitting. Heating the material
improves bonding and elastic moldability.