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Detectamet/Detecta-thane
Sheeting offers the following service
properties:
Metal Detectable
Detectamet/Detecta-thane”
is a metal detectable general
purpose compound having good
mechanical properties. Features
include good heat stability inside
temperature range, high impact
resistance, excellent abrasion
resistance, tough & durable,
supplied in specific colour; Blue.
Applications:
Wearstrips, Guide Blocks, Impact
Bars, Gaskets, Conveyor
Skirting, Roller Coverings,
Scrapers, Storage Trays,Mixing
Blades, General Engineering
Applications, Liners, etc.etc.
Hardness
Detectamet/Detecta-thane is supplied
in a range of hardnesses from 25°
Shore A which is softer than a
pencil rubber or an elastic band to
84° Shore D which is harder than a
golf ball. The table below gives some
guidance as to these hardness
ranges.
Compression
When load is applied to a Detectamet/Detecta-thane
it deflects but unrestrained
surfaces bulge in sympathy. This is
because Detectamet/Detecta-thane
is incompressible and acts like a
fluid capable of changing its shape
to the limit of its strength under
load. Strictly speaking this is not
compression but nevertheless it is
the term used in elastomer
technology. Detectamet/Detecta-thane
has a higher load bearing capacity
than that of more conventional
elastomers for the same hardness.
This characteristic permits greater
design choices and usually allows
the use of smaller components. ECC/Detectamet
can offer guidance on polymer
selection and provide indicative
load and deflection figures for most
compression applications.
Tension
Tensile strength and associated
elongation are usually measured as
part of material and process control
regimes. It is rare that elastomers
are used in tension and then only at
a small fractlon of thelr ultimate
strength. Even so Detectamet/Detecta-thane
has much higher tensile strengths
than conventional elastomers.
Resilience
While resilience is generally a
function of hardness in conventional
elastomers, this is not true of
Detectamet/Detecta-thane. Detectamet/Detecta-thane
can be formulated to give a wide
range of resilience values. An added
benefit is that the resilience
changes very little between 10°C and
100°C giving more consistent
performance in a variable
environment.
Abrasion
When compared to rubber, plastics
and metals Detectamet/Detecta-thane
offers outstanding resistance to
wear giving many times the life span
of these conventional materials.
Detectamet/Detecta-thane can be
tailored to suit sliding and
impingement abrasion and has a well
deserved reputation for its
durability.
Temperature
Detectamet/Detecta-thane will
provide excellent service in cold
stores and Arctic conditions.
Physical properties change little
down to -15°C, and while further
reductions in temperature result in
a gradual stiffening, Detectamet/Detecta-thane
is still quite serviceable at -70°C.
At higher temperatures Detectamet/Detecta-thane
will provide good service up to 90°C
and is suitable for intermittent use
at 120°C. Beyond these temperatures,
specially formulated materials are
needed.
Water Resistance
Selected grades of Detectamet/Detecta-thanes
are suitable for use in water at up
to 50°C. Water absorption is very
low and volume swell is negligible.
This means that precise components
can be used safely in water without
fear of size changes affecting
performance. High humidity has
little effect on Detectamet/Detecta-thanes
and a secondary benefit is that
these elastomers do not support
fungus growth and are generally
resistant to such attack. This makes
Detectamet/Detecta-thanes mouldings
particularly suitable for tropical
environments.
Mechanical Properties
At low hardnesses all elastomers,
Detectamet/Detecta-thane
included, merely bend under impact.
As hardness rises elastomers and
plastics demonstrate a tendency to
brittleness and crack under impact.
Detectamet/Detecta-thane
has significantly better impact
resistance than any material of
comparable hardness.
Detectamet/Detecta-thane
will resist cracking under repeated
flexing. Selection of the
appropriate grade will allow
extremely high life spans, with
tests proving that in excess of
1,000,000 cycles is common place.
Detectamet/Detecta-thane
will also show excellent resistance
to cut propagation and can be used
in very thin sections because of its
exceptional strength and toughness.
Friction
Detectamet/Detecta-thane
resembles most other elastomers in
that friction decreases as hardness
rises. The coefficient of friction
against non-Iubricated surfaces
ranges from 0.2 (hard polymers) to
0.6 (soft polymers).
Machineability
It is possible to machine most
grades of
Detctamet/Detecta-thane. The harder
grades can be processed on most
conventional machine tools, while
softer compounds need to be ground
or cut with very sharp tools.
Electrical Properties
Detectamet/Detecta-thane
generally has very good insulating
properties and can be used for
potting and encapsulation. It is
also an excellent material for
mounting conductive rails,
particularly outside, where it not
only provides good insulation but
also does not deteriorate.
Noise
The combination of compressive and
flex characteristics make
Detectamet/Detecta-thane
ideal for breaking noise
transmission paths. It makes superb
heavy duty machine mounts.
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