|
| PTFE Detailed Properties
(Polytetrafluoroethylene) |
|
|
Properties
|
ASTM or Unit
|
PTFE
|
| MECHANICAL PROPERTIES |
| Specific Gravity |
D792 | 2.18 |
| Elongation % |
D638 | 200~450 |
| Tensile Strength (psi) |
D638 | 2,000~4,500 |
| Flexural Strength (psi) |
D790 |
no break |
| Compressive Strength |
D695 | 3,500 |
Tensile Elastic Modulus
(Young's Modulus) (psi) |
D638 | 57,000 |
(psi)
Flexural Modulus
103MPa (103kgf/cm2) | D790 | 71,000~
85,000 |
| D790 | 0.5-0.6
(5.0-6.0) |
FlexLife
(MIT cycles) | D2176 |
>1,000,000 |
Hardness Durometer
Shore D |
D636 | D50~65 |
| Coefficient of Friction |
on steel | 0.02 |
Abrasion Resistance
1000 revs. |
Taber | 12 |
Impact Strength IZOD
73°F/23°C, notched ft/lbs/in |
D256 | 3 |
| THERMAL PROPERTIES |
| Melting Point |
°C
(°F) | 327
(621) |
Upper Service
Temperature(20,000h) |
°C
(°F) |
260
(500) |
| Flame Rating** |
UL 94 | V-0 |
Thermal
Conductivity
|
BTU/hr/ft2/deg F in |
1.7 |
| cal/sec/cm2,ºC/cm |
6
x 10-4 |
| Linear Coefficient of
Thermal Expansion 10-5 °C |
D696 |
>11.6 |
| Heat of
Fusion |
BTU/LB |
29-37 |
| Heat
of Combustion |
BTU/LB |
2200 |
| Low
Temperature Embrittlement |
°C
(°F) |
-268
(-450) |
| ELECTRICAL
PROPERTIES |
| Dielectric
Constant |
D150/103Hz |
2.1 |
| D150/106Hz |
2.1 |
Dielectric
Strength
10 mil film |
D149 |
>1400 |
| Volume
Resistivity ohm-cm |
D257 |
>1018 |
Surface
Resistivity
ohm/sq. |
D257 |
>1017 |
| GENERAL
PROPERTIES |
Chemical/Solvent
Resistance |
D543 |
Excellent |
| Water
Absorption, 24h |
% |
<0.01 |
|
Deformation Under Load |
*D621/100°C |
5.0 |
|
**D621/25°C |
7.0 |
| Refractive
Index |
|
1.35 |
|
Limiting Oxygen Index |
>95 |
>95 |
|
Properties
|
ASTM or Unit
|
PTFE
|
|
*6.8 MPa (986 psi),24h
**13.7 MPa (1987 psi),24h
|
|
