Silicones - Glass Fibre and Mineral Filled

Advantages

Significantly improved flexural modulus, better tensile strength, notched impact strength, mould shrinkage, surface hardness and linear expansion compared with unmodified silicone.

Disadvantages

Lower elongation at break, HDT; reduced electrical characteristics and flow compared with unmodified silicone.

Typical Properties

Property

Value

Density  (g/cm3)

1.85

Surface Hardness

RM90

Tensile Strength (MPa)

35

Flexural Modulus (GPa)

14

Notched Izod (kJ/m)

0.05

Linear Expansion (/°C x 10-5)

4

Elongation at Break (%)

1.5

Strain at Yield (%)

N/A

Max. Operating Temp. (°C)

240

Water Absorption (%)

0.1

Oxygen Index (%)

40

Flammability UL94

V0

Volume Resistivity (log ohm.cm)

14

Dielectric Strength (MV/m)

15

Dissipation Factor1kHz

0.002

Dielectric Constant  1kHz

3.9

HDT @ 0.45 MPa (°C)

260+

HDT @ 1.80 MPa (°C)

260

Material Drying  hrs @ °C

NA

Melting Temp. Range (°C)

60 -  80

Mould Shrinkage (%)

0.3

Mould Temp. Range (°C)

180 - 210

Applications

Encapsulation of electronic components. High performance PCBs.

 

Source : Abstracted from Plascams

For more information on Plascams please visit The Rubber and Plastics Research Association

 

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