| |
PTFE Detailed Properties
(Polytetrafluoroethylene) |
The
table below lists a generally accepted summary of properties that
we believe to be reliable. Please note that many of these resins
are produced in several varieties and property characteristics
may vary. Therefore, determination of resin is dependent on the
application and this table is only meant to serve as a general
guideline. |
|
| Properties |
ASTM or Unit |
PTFE |
| MECHANICAL PROPERTIES |
| Specific Gravity |
D792 |
2.18 |
| Elongation % |
D638 |
200~450 |
| Tensile Strength (psi) |
D638 |
2,000~7,000 |
| 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 |
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