| Typical
properties |
DMC
|
SMC
|
| MECHANICAL |
. |
. |
| Tensile
strength (Mpa) |
30-70 |
50-130 |
| Tensile
modulus (GPa) |
8-10 |
8-12 |
| Elongation
at break (%) |
|
|
| Flexural
strength (Mpa) |
80-120 |
125-225 |
| Flexural
modulus (GPa) |
9-15 |
9-15 |
| Impact
strength (Charpy unnotched) (KJ/m-2) |
8-14 |
40-50 |
| PHYSICAL |
. |
. |
| Colour |
Various
to suit |
Various
to suit |
| Specific
Gravity (gm/cc) |
1.8-2.1 |
1.7-2.1 |
|
Coefficient
of Linear expansion (°C)
|
2x10-5 |
2x10-5 |
| Mould
Shrinkage |
0-0.2% |
0-0.2% |
| 24Hour
water absorption (mg) |
<25 |
<25 |
| ELECTRICAL |
|
|
| Electrical
strength at 90°C (MV/m) |
8.0-10.0 |
8.0-10.0 |
| Surface
Resistivity (log10ohms) |
10-12 |
12-13 |
| Volume
Resistivity (log10ohm cm) |
11-13 |
12.5-13 |
| Power
Factor at 1Mhz Tan o |
0.010-0.017 |
0.010-0.017 |
| Permittivity
at 1Mhz |
4.0-5.5 |
4.0-5.5 |
| Insulation
resistance (3mm specimen)(log10ohms) |
>13 |
>13 |
| HEAT
AND FIRE |
. |
. |
| Surface
spread of flame BS 467 part 7 |
Class
1-3 |
Class
1-3 |
