Page 106 - GETELEC - Products and solutions Catalog

The advantages of silicone

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, moulding, injection, automatic
placement, vulcanization onto cover...) ensures we are able to provide a bespoke solution for your environment.

• permeability and gas absorption : • Heat resistance :
Elastomers’ gas permeability and silicone fluids’ Silicones’ thermo-oxidative stability is considerably
gas absorption are relatively high. superior to that of classical organic molecules. For
example, contiuous temperature resistance, in the
absence of other constraints, can be estimated as
follow : EVC silicone elastomers............180 – 250°C

• resistance to ligHt and ozone-induced natural ageing:
The light-resistance of HCR (High cured reticulation)
in the absence of other constraints can be estimated
as shown on a scale of 1 (weak resistance) to 5 (good • dielectric properties :
resistance): HCR silicone elastomers...............4-5 Silicones are naturally good insulators, even
though its is possible to make them conductive
by incorporating conductive loads. Their electri-
cal properties fall on average within the following
• low temperature-induced loss of properties : range :
Their viscosity, dielectric properties, thermal capa-
16
12
city etc... change less with temperature than many - Volume resistivity......................10 to 10 Ohms/cm
other polymers. - Dielectric constant....................1 to 4
- Loss factor.................................2 to 200.10
-4
- Dielectric strength.........................10 to 30 kV/mm

• fire resistance : • cHemicals resistance :
Silicone have better natural fire resistance In the absence of acidic or basis catalysts,
than polyolefins. Silicones also have the ad- silicones have very good hydrolytic stability. This
vantage of forming a silicic skeleton wich may exmplains their use in medical and paramedical
work as the final barrier to the propagation of applications and physiological settings as
fires and maintain eletrical insulation, for cable well as their employment for the manufacture
sheaths, for example. of packaging for certain food and cosmetic
products.

• pHysiological safety :
The carefully chosen grades of silicone comply with all necessary European and American standards for medical,
pharmaceutical, paramedical and food applications.

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106 Tel : +33 1 39 20 42 42 | infos@getelec.net