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The advantages of silicone Cellular silicone elastomers

Our range of cellular silicone elastomers allows the making of gaskets with low hardness and shock
absorbing stops. All these products are available with or without adhesive on request.
GETELEC formulates its own silicone mixtures and transforms then itself, thus ensuring we can provide bespoke
solutions for our customers. We use specific grades of silicone as the basis of our formulations. Our laboratory
and research center support customers from selection of material through to the choice of transformation
procedure. Having in-house control of the various processes (extrusion, cutting, molding, injection, automatic Reference GT 11 GT 21 GT 31 GT 27 EX
placement, vulcanization onto cover...) ensures we are able to provide a bespoke solution for your environment. Type Closed cell cellular material
Expanded Expanded Expanded Expanded
Material Silicone Silicone Silicone Fluorosilicone

Hardness (shore A ±5) 12 20 30 20
Density (g/cm3 ±0.1) 0.40 0.60 0.80 0.55
• Permeability and gas absorption: • Heat resistance : UL94 rating RF version (UL94 V1) feasibility
Elastomers’ gas permeability and silicone fluids’ Silicones’ thermo-oxidative stability is considerably Color Off-white (other color on request) Blue
• gas absorption are relatively high. superior to that of classical organic molecules For Working temperature -55°C to +200°C (peak at 250°C) -60°C to +230°C
example, continuous temperature resistance, in the Minimum thickness 2 mm
absence of other constraints, can be estimated as
follow : HTV silicone elastomer............180 – 250°C
• Resistance to light and ozone-induced natural
aging: : The light-resistance of HTV (Hight
temperature vulcanization) in the absence of other Compression force
constraints can be estimated as shown on a scale
of 1 (weak resistance) to 5 (good resistance): • Dielectric properties : Reference GT 11 GT 21 GT 31
HTV silicone ..................4-5 Silicones naturally have good insulating properties, Sample thickness 4 mm 3.5 mm 4 mm
although it is possible to make them conductive Force kg*/cm² Crushing % Force kg*/cm² Crushing% Force kg*/cm² Crushing %
by incorporating conductive fillers. Electrical
• Low degradation of properties with properties are on average in the following ranges: 0.26 7 0.4 17 0.65 5
temperature : Viscosity, dielectric properties, heat 0.45 18.6 0.7 25 1.3 10
capacity, etc., Change less with temperature than 12 16 0.76 30.2 1.1 35 2.34 15
many other polymers.. - Transverse resistivity.....................10 to 10 Ohms/cm
- Dielectric constant....................1 to 4 1.16 41.9 1.5 42 3.25 20
- Loss factor.................................2 to 200.10 1.84 53.5 2.1 48 - -
-4
- Dielectric strength.........................10 to 30 kV/mm
• Fire resistance :
Silicone have better natural fire resistance than Available formats : Molded Customized cutting Sheet
polyolefins. Silicones also have the advantages
forming a silica skeleton than can act as a final
barrier to the propagation of fires and maintain • Chemical resistance :
electrical insulation, for cable sheaths for example. In the absence of acid or base catalysts, silicones Tolerances of our sealing sheets :
are highly stable to hydrolysis. This explains their
medical and paramedical uses in physiological External dimensions (mm) Thickness (mm) Thickness tolerances +/-
environments, as well as their use in the 300 x 300 1.00 ≤ Th. < 2.00 +/- 0.20
manufacture of packaging for certain food and
• Physiological safety : cosmetic products. 300 x 300 2.00 ≤ Th. < 4.00 +/- 0.30
The carefully chosen grades of silicone comply 300 x 300 4.00 ≤ Th. < 8.00 +/- 0.50
with all necessary European and American
standards for medical, pharmaceutical,
paramedical and food applications..

Note :
The use of expanded material beyond 50% compression is not
recommended due to the risk of breaking the cell walls and
inducing significant residual deformation.

Recommended compression is in the 20 to 30% range.

106
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Tel : 01 39 20 42 42 | info@getelec.com