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Vibration damping materials |
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Viscoelastic Sheet
VS
Improved sound insulation of steel-walled
enclosures
Damped Sheet
Metal PVP
Reduces vibration and noise transmission in
structures.
Damping layer SWEDAC DG-U 6
Reduces noise generated by vibration in
structures.
Damping
Glue DG A2
Structure borne noise and vibration in sheet
material and wood products.
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SWEDAC
Damping cassettes
Reduction of structure borne noise and
vibration in steel and aluminium constructions.
Damping sheet
DS
Reduces vibration and prevents radiation of noise on metal
structures up to 2 mm in thickness.
Damping compound
DC-P5
Reduces vibration and prevents radiation of
noise on metal structures up to 2 mm in
thickness |
- Viscoelastic Sheet
VS
The VS range of Viscoelastic Sheet is intended for use in
constrained layer constructions to the damping of resonant vibration in
aluminium and steel constructions.
Use:
Shipdecks
and bulkheads, improved sound insulation of steel doors, engine
compartments and other steel-walled enclosures, and improved impact
sound reduction on steel staircases.
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- Damped Sheet Metal
PVP
Swedac PVP is a laminate designed to reduce vibration and noise
transmission in structures. It consists of two metal sheets joined by a
thin layer of viscoelastic glue. The construction operates on the
principle of constrained layer damping - the sheer forces in the
constrained viscoelastic layer cause the energy of the vibration to be
converted into heat.
Undamped metal construction normally have a very
low loss factor, typically in the range 0.001 to 0.01. The loss factor
can be increased to something in the region of 0.3 to 0.8 by using
Swedac PVP. This means that the amplitude of the resonant vibration when
the construction is subjected to structure borne sound or vibration will
be much lower than for an undamped construction. Reduced amplitude of
vibration means less radiation of sound, and also a reduced risk of
fatigue failure.
Use:
To reduce
vibration and noise transmission in structures.
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- Damping layer SWEDAC
DG-U 6
Two component polyurethane compound designed for use in
constrained layer applications.
DG-U6 viscoelastic damping layer is a
specially formulated polyurethane polymer designed to produce, together
with the steel construction and a steel sheet constraining layer, a
final structure with very high loss factor over a wide temperature and
frequency range. This dramatically reduces noise generated by vibrations
in the structure.
DG-U 6 has a high tixotrophy allowing thick layers
to be applied on vertical
surfaces.
Use:
To dramatically reduce
noise generated by vibrations in structures.
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- Damping Glue DG
A2
Swedac DG A2 Damping Glue is a water-based acrylic glue designed
for the control of structure borne noise and vibration in sheet material
and wood products. Such stiff materials require very little excitation
to produce resonant vibration and it is quite easy to produce structure
borne vibration which is reradiated as noise in other parts of a
building construction. Just how big a problem the noise becomes is
dependent on the overall Loss Factor of the construction. Typical
construction materials such as plywood, chipboard and plasterboard have
very small loss factors in the region of 0.01 to 0.03 - that is to say,
very little internal damping. By means of Swedac DG A2 Damping glue, the
loss factor can be raised to 0.2 to 0.4 - the effect of which is to
provide a noise reduction of 8 to 16
dB.
Use:
Control of structure borne
noise and vibration in sheet material and wood products.
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- SWEDAC Damping
cassettes
A new development for the reduction of structure borne noise and
vibration in steel and aluminium constructions.
Swedac Damping
Cassettes have been developed for the purpose of reducing the amplitude
of free resonant bending waves which are set up in response to vibration
in the plating of steel and aluminium constructions.
Damping Cassettes are very
practical where the plate thickness exceeds 5 mm, being simply welded to
the structure, in contrast to other methods of damping, such as damping
sheet and conventional constrained layer constructions, which are glued
to the resonant plating.
Use:
Reduction
of structure borne noise and vibrations in steel and aluminium
constructions.
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- Damping sheet
DS
Applied at up to twice the thickness of the substrate, Swedac DS
substantially improves damping characteristics of the structure, thereby
reducing vibration and preventing the radiation of noise.
For easy
installation, Swedac DS is produced with a self adhesive
backing.
Use:
Typical applications are
on metal structures up to 2 mm in thickness, such as ventilation ducts,
automotive applications, business and domestic machinery.
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- Damping compound
DC-P5
Applied at up to twice the thickness of the substrate, Swedac
DC-P 5 substantially improves damping characteristics of the structure,
thereby reducing vibration and preventing the radiation of
noise.
Use:
Typical applications are on
metal structures up to 2 mm in thickness, such as ventilation ducts,
automotive applications, business and domestic machinery.
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