| Material |
AFM 55 is an asbestos-free gasket and insulating material. It is composed of aramide fibres and other asbestos substitutes which are resistant to high temperatures. These substitutes are processed with synthetic binders under elevated pressure and temperature. |
| Properties |
AFM 55 is a material which has a good electrical and thermal insulating effect as well as excellent thermal resistance. In the delivery state, AFM 55 is soft, pliable and easy to work and process. Special temperature treatment or normal use at elevated temperature cause the material to become hard and achieve its maximum mechanical strength. |
| Application |
To seal off fluids and for thermal and/or electrical insulation, e.g. in hot pressing or welding devices or to manufacture transport rolls resistant to high temperatures. |
| Surfaces |
The standard version of AFM 55 has a non-stick layer on one surface with a high coefficient of friction (TD 1). This facilitates dismantling. |
Technical Data
(Nominal thickness
2.00 mm) |
Density |
g/cm³ |
1.8 - 2.0 |
| Ignition loss acc. to DIN 52 911 |
% |
< 34 |
| Tensile strength |
| acc. to ASTM F 152 |
across grain |
N/mm² |
> 10 |
| acc. to DIN 52 910 |
across grain |
N/mm² |
> 8 |
Residual stress acc. to DIN 52 913
heated material (2h, 200 °C) |
| 16 h, 300 °C |
N/mm² |
 20 |
| 16 h, 175 °C |
N/mm² |
28 |
Compressibility and recovery
acc. to ASTM F 36, procedure J |
| compressibility |
% |
4 - 10 |
| recovery |
% |
> 50 |
| Swelling acc. to ASTM F 146 |
in IRM 903 Oil (replaces ASTM Oil No. 3)
5 h, 150 °C |
| increase in thickness |
% |
< 10 |
| increase in weight |
% |
< 15 |
in ASTM Fuel B
5 h, RT |
| increase in thickness |
% |
< 10 |
| increase in weight |
% |
< 10 |
in water / antifreeze (50:50)
5 h, 100 °C |
| increase in thickness |
% |
< 5 |
| increase in weight |
% |
< 10 |
Heat conductivity
following two-sheet device
acc. to DIN 52612,
at 5 N/mm² surface pressure |
| fresh material (48 h, RT, 60% rel. hum.) |
W/m·K |
0.65 |
| heated material (2 h, 200 °C) |
W/m·K |
0.58 |
Electrical specific resistance
acc. to DIN 53482,
at 5 N/mm² surface pressure |
| fresh material (48 h, RT, 60% rel. hum.) |
 cm |
3.7 x 109 |
| heated material (2 h, 200 °C) |
cm |
1.7 x 1014 |
Dielectric strength
acc. to DIN 53481,
at constant voltage |
| fresh material (48 h, RT, 60% rel. hum.) |
kV/mm |
8.5 |
| heated material (2 h, 200 °C) |
kV/mm |
10.0 |
| Short-term peak temperature |
°C |
400 |
| Maximum continuous temperature |
°C |
300 |
| Maximum operating pressure |
bar |
100 |
