PTFE (Poly Tetra Fluoro Ethylene) Properties
PTFE grade used are as per ASTM D 1457 Type III and ASTM D 4895 standard
Mechanical |
Value |
Test Method |
1. Density |
2.15 – 2.18 g / cm3 |
As per DN 53479 |
2. Tensile Strength |
20.7 MPA |
As per DN 53455 |
3. Elongation at Break |
200 to 300 % |
As per DN 53455 |
4. Hardness |
50-60 Shore’D’ |
As per DN 53516 |
Thermal |
Value |
Test Method |
1. Melting Point |
320 – 340°C |
As per ISO 12086 |
2. Temperature Strength |
-200°C to 260°C |
|
3. Coefficient of Linear Expansion |
20°C – 100°C 16 x 10-5 K-1 |
As per DIN 53328 |
|
20°C – 200°C 19.5 x 10-5 K-1 |
|
|
20°C – 300°C 25 x 10-5 K-1 |
|
4. Softening Point |
110°C |
As per DIN 53640 |
5. Conductivity |
0.25 W / mk |
As per DIN 52612 |
6. Flammability |
Non Flammable |
|
7. Sp. Heat at 0°C |
0.96 kj / kg x k |
|
8. Specific Heat at 50°C |
1.05 kj / kg x k |
|
Electrical |
Value |
Test Method |
1. Dielectric Strength |
40 – 80 kv / mm |
As per VDE 0303 part 2 |
(Film 0.2 mm thick) |
|
|
2. Dielectric constant |
2.1 |
As per DIN 53483 |
from 50 – 107 Hz |
|
|
3. Volume Resistivity |
1018 x cm |
As per DIN 53482 |
4. Surface Resistivity |
>1017 |
As per DIN 53482 |
5. Arc Resistance |
L4 Degree |
As per VDE 0303 part 5 |
Others |
Value |
Test Method |
1. Water Absorption |
<0.01 % |
As per DIN 53495 |
2. Weather Resistance |
Excellent |
|
3. Chemical Resistance |
Excellent |
|
4. Coefficient of Permeability |
2 – 8 x10-7 cm3.cm /cm.sec.bar |
|
5. FDA Compliant |
Yes |
21 CFR 1771550 |
6. UL Listed |
Yes |
File 54681 QMFZ2 |