|
Phenolic
SMC - DMC
SMC (Sheet Moulding Compound) and DMC (Dough Moulding
Compound) are reinforced composite materials based on a unique
and patented thermosetting Phenolic resin, filler and glass fibre.
The materials are asbestos free and non-acid catalysed, and specially
formulated for hot compression moulding. Moulding produced from
these materials combine the convenience of SMC- DMC with the special
properties of phenolics. These include excellent chemical resistance,
high temperature capability and outstanding fire performance.
As with most phenolics, the smoke and toxic fume emission in a
developed fire is also very low and meets the requirements of
Rail Industry specific BS 6853 class 1a.
| Typical
properties |
DMC
|
SMC
|
| MECHANICAL.. |
| Tensile
strength (Mpa) |
30
|
75
|
| Tensile
modulus (GPa) |
9.0
|
13.0
|
| Elongation
at break (%) |
0.4
|
0.85
|
| Flexural
strength (Mpa) |
100
|
137
|
| Impact
strength (Charpy unnotched) (KJ/m-2) |
8-10
|
35-40
|
| PHYSICAL.. |
| Colour |
Black
|
Black
|
| Specific
Gravity (gm/cc) |
2.0
|
1.75
|
|
Coefficient
of Linear expansion (°C)
|
10.0x10-6
|
20x10-6
|
| Mould
Shrinkage |
0.01-0.05%
|
0.01-0.05%
|
| 24Hour
water absorption (%) |
0.5
|
0.5
|
| HEAT
AND FIRE.. |
| Continuous
use temperature (°C) |
200
|
200
|
| BS476
Part 6 |
I-7.0,
i-0.7
|
-
|
| BS476
Part 7 |
Class
1
|
-
|
| UL 94 |
Vo
|
-
|
| London
Underground (°C) |
367
|
-
|
| 3m cube
temperature index |
Ao
(on) 0.43
|
-
|
| smoke
emission |
Ao
(off) 0.56
|
-
|
| Annex
B toxicity |
0.29
|
-
|
| BS
6853CHEMICAL RESISTANCE |
| Highly
resistant to: Organic
acids, alcohols, keynotes, adehydes, esters, hydrocarbons,
metallic salt solutions |
| Good
resistance to: Mineral acids |
| Poor
resistance to: Alkalis, alkaline solutions |
 |
Download
our Phenolic SMC - DMC datasheet
(Approx size 148k) |
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